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236 lines
10 KiB
236 lines
10 KiB
<?xml version="1.0" encoding="utf-8"?>
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<?xml-stylesheet href="/xsl/glsa.xsl" type="text/xsl"?>
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<?xml-stylesheet href="/xsl/guide.xsl" type="text/xsl"?>
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<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
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<glsa id="200408-24">
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<title>Linux Kernel: Multiple information leaks</title>
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<synopsis>
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Multiple information leaks have been found in the Linux kernel, allowing an
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attacker to obtain sensitive data which may be used for further
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exploitation of the system.
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</synopsis>
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<product type="ebuild">Kernel</product>
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<announced>August 25, 2004</announced>
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<revised>March 27, 2011: 03</revised>
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<bug>59378</bug>
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<bug>59769</bug>
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<bug>59905</bug>
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<access>local</access>
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<affected>
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<package name="sys-kernel/aa-sources" auto="no" arch="*">
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<unaffected range="rge">2.4.23-r2</unaffected>
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<unaffected range="ge">2.6.5-r5</unaffected>
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<vulnerable range="lt">2.6.5-r5</vulnerable>
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</package>
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<package name="sys-kernel/alpha-sources" auto="yes" arch="*">
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<unaffected range="ge">2.4.21-r12</unaffected>
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<vulnerable range="lt">2.4.21-r12</vulnerable>
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</package>
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<package name="sys-kernel/ck-sources" auto="no" arch="*">
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<unaffected range="rge">2.4.26-r1</unaffected>
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<unaffected range="ge">2.6.7-r5</unaffected>
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<vulnerable range="lt">2.6.7-r5</vulnerable>
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</package>
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<package name="sys-kernel/development-sources" auto="yes" arch="*">
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<unaffected range="ge">2.6.8</unaffected>
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<vulnerable range="lt">2.6.8</vulnerable>
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</package>
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<package name="sys-kernel/gentoo-dev-sources" auto="yes" arch="*">
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<unaffected range="ge">2.6.7-r12</unaffected>
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<vulnerable range="lt">2.6.7-r12</vulnerable>
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</package>
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<package name="sys-kernel/gentoo-sources" auto="yes" arch="*">
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<unaffected range="rge">2.4.19-r22</unaffected>
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<unaffected range="rge">2.4.20-r25</unaffected>
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<unaffected range="rge">2.4.22-r16</unaffected>
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<unaffected range="rge">2.4.25-r9</unaffected>
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<unaffected range="ge">2.4.26-r9</unaffected>
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<vulnerable range="lt">2.4.26-r9</vulnerable>
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</package>
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<package name="sys-kernel/grsec-sources" auto="yes" arch="*">
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<unaffected range="ge">2.4.27.2.0.1-r1</unaffected>
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<vulnerable range="lt">2.4.27.2.0.1-r1</vulnerable>
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</package>
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<package name="sys-kernel/gs-sources" auto="yes" arch="*">
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<unaffected range="ge">2.4.25_pre7-r11</unaffected>
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<vulnerable range="lt">2.4.25_pre7-r11</vulnerable>
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</package>
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<package name="sys-kernel/hardened-dev-sources" auto="yes" arch="*">
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<unaffected range="ge">2.6.7-r7</unaffected>
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<vulnerable range="lt">2.6.7-r7</vulnerable>
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</package>
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<package name="sys-kernel/hardened-sources" auto="yes" arch="*">
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<unaffected range="ge">2.4.27-r1</unaffected>
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<vulnerable range="lt">2.4.27-r1</vulnerable>
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</package>
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<package name="sys-kernel/hppa-dev-sources" auto="yes" arch="*">
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<unaffected range="ge">2.6.7_p14-r1</unaffected>
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<vulnerable range="lt">2.6.7_p14-r1</vulnerable>
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</package>
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<package name="sys-kernel/hppa-sources" auto="no" arch="*">
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<unaffected range="ge">2.4.26_p7-r1</unaffected>
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<vulnerable range="lt">2.4.26_p7-r1</vulnerable>
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</package>
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<package name="sys-kernel/ia64-sources" auto="yes" arch="*">
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<unaffected range="ge">2.4.24-r10</unaffected>
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<vulnerable range="lt">2.4.24-r10</vulnerable>
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</package>
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<package name="sys-kernel/mips-sources" auto="yes" arch="*">
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<unaffected range="rge">2.4.25-r8</unaffected>
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<unaffected range="rge">2.4.26-r8</unaffected>
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<unaffected range="rge">2.6.4-r8</unaffected>
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<unaffected range="rge">2.6.6-r8</unaffected>
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<unaffected range="ge">2.6.7-r5</unaffected>
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<vulnerable range="lt">2.6.6-r8</vulnerable>
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</package>
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<package name="sys-kernel/mm-sources" auto="yes" arch="*">
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<unaffected range="ge">2.6.8_rc4-r1</unaffected>
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<vulnerable range="lt">2.6.8_rc4-r1</vulnerable>
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</package>
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<package name="sys-kernel/openmosix-sources" auto="yes" arch="*">
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<unaffected range="ge">2.4.24-r4</unaffected>
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<vulnerable range="lt">2.4.24-r4</vulnerable>
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</package>
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<package name="sys-kernel/pac-sources" auto="yes" arch="*">
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<unaffected range="ge">2.4.23-r12</unaffected>
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<vulnerable range="lt">2.4.23-r12</vulnerable>
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</package>
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<package name="sys-kernel/pegasos-dev-sources" auto="yes" arch="*">
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<unaffected range="ge">2.6.8</unaffected>
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<vulnerable range="lt">2.6.8</vulnerable>
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</package>
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<package name="sys-kernel/rsbac-sources" auto="yes" arch="*">
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<unaffected range="ge">2.4.26-r5</unaffected>
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<vulnerable range="lt">2.4.26-r5</vulnerable>
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</package>
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<package name="sys-kernel/rsbac-dev-sources" auto="yes" arch="*">
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<unaffected range="ge">2.6.7-r5</unaffected>
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<vulnerable range="lt">2.6.7-r5</vulnerable>
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</package>
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<package name="sys-kernel/selinux-sources" auto="yes" arch="*">
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<unaffected range="ge">2.4.26-r3</unaffected>
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<vulnerable range="lt">2.4.26-r3</vulnerable>
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</package>
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<package name="sys-kernel/sparc-sources" auto="yes" arch="*">
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<unaffected range="ge">2.4.27-r1</unaffected>
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<vulnerable range="lt">2.4.27-r1</vulnerable>
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</package>
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<package name="sys-kernel/uclinux-sources" auto="yes" arch="*">
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<unaffected range="rge">2.4.26_p0-r6</unaffected>
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<unaffected range="ge">2.6.7_p0-r5</unaffected>
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<vulnerable range="lt">2.6.7_p0-r5</vulnerable>
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</package>
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<package name="sys-kernel/usermode-sources" auto="yes" arch="*">
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<unaffected range="rge">2.4.24-r9</unaffected>
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<unaffected range="rge">2.4.26-r6</unaffected>
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<unaffected range="ge">2.6.6-r6</unaffected>
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<vulnerable range="lt">2.6.6-r6</vulnerable>
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</package>
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<package name="sys-kernel/vanilla-sources" auto="yes" arch="*">
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<unaffected range="ge">2.4.27</unaffected>
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<vulnerable range="lt">2.4.27</vulnerable>
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</package>
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<package name="sys-kernel/vserver-sources" auto="yes" arch="*">
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<unaffected range="ge">2.0</unaffected>
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<vulnerable range="lt">2.4.26.1.28-r4</vulnerable>
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<vulnerable range="lt">2.0</vulnerable>
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<vulnerable range="ge">2.4</vulnerable>
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</package>
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<package name="sys-kernel/win4lin-sources" auto="yes" arch="*">
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<unaffected range="rge">2.4.26-r6</unaffected>
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<unaffected range="ge">2.6.7-r2</unaffected>
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<vulnerable range="lt">2.6.7-r5</vulnerable>
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</package>
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<package name="sys-kernel/wolk-sources" auto="yes" arch="*">
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<unaffected range="rge">4.9-r14</unaffected>
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<unaffected range="rge">4.11-r10</unaffected>
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<unaffected range="ge">4.14-r7</unaffected>
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<vulnerable range="lt">4.14-r7</vulnerable>
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</package>
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<package name="sys-kernel/xbox-sources" auto="yes" arch="*">
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<unaffected range="rge">2.4.27-r1</unaffected>
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<unaffected range="ge">2.6.7-r5</unaffected>
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<vulnerable range="lt">2.6.7-r5</vulnerable>
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</package>
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</affected>
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<background>
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<p>
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The Linux kernel is responsible for managing the core aspects of a
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GNU/Linux system, providing an interface for core system applications
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as well as providing the essential structure and capability to access
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hardware that is needed for a running system.
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</p>
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</background>
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<description>
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<p>
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The Linux kernel allows a local attacker to obtain sensitive kernel
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information by gaining access to kernel memory via several leaks in the
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/proc interfaces. These vulnerabilities exist in various drivers which
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make up a working Linux kernel, some of which are present across all
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architectures and configurations.
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</p>
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<p>
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CAN-2004-0415 deals with addressing invalid 32 to 64 bit conversions in
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the kernel, as well as insecure direct access to file offset pointers
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in kernel code which can be modified by the open(...), lseek(...) and
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other core system I/O functions by an attacker.
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</p>
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<p>
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CAN-2004-0685 deals with certain USB drivers using uninitialized
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structures and then using the copy_to_user(...) kernel call to copy
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these structures. This may leak uninitialized kernel memory, which can
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contain sensitive information from user applications.
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</p>
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<p>
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Finally, a race condition with the /proc/.../cmdline node was found,
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allowing environment variables to be read while the process was still
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spawning. If the race is won, environment variables of the process,
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which might not be owned by the attacker, can be read.
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</p>
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</description>
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<impact type="normal">
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<p>
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These vulnerabilities allow a local unprivileged attacker to access
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segments of kernel memory or environment variables which may contain
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sensitive information. Kernel memory may contain passwords, data
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transferred between processes and any memory which applications did not
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clear upon exiting as well as the kernel cache and kernel buffers.
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</p>
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<p>
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This information may be used to read sensitive data, open other attack
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vectors for further exploitation or cause a Denial of Service if the
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attacker can gain superuser access via the leaked information.
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</p>
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</impact>
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<workaround>
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<p>
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There is no temporary workaround for any of these information leaks
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other than totally disabling /proc support - otherwise, a kernel
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upgrade is required. A list of unaffected kernels is provided along
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with this announcement.
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</p>
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</workaround>
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<resolution>
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<p>
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Users are encouraged to upgrade to the latest available sources for
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their system:
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</p>
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<code>
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# emerge sync
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# emerge -pv your-favorite-sources
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# emerge your-favorite-sources
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# # Follow usual procedure for compiling and installing a kernel.
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# # If you use genkernel, run genkernel as you would normally.</code>
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</resolution>
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<references>
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<uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0415">CAN-2004-0415</uri>
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<uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0685">CAN-2004-0685</uri>
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<uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2004-1058">CVE-2004-1058</uri>
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</references>
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<metadata tag="submitter" timestamp="Tue, 17 Aug 2004 02:16:55 +0000">
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plasmaroo
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</metadata>
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</glsa>
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