63 lines
2.2 KiB
XML
63 lines
2.2 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
|
||
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
|
||
<glsa id="201512-03">
|
||
<title>GRUB: Authentication bypass</title>
|
||
<synopsis>GRUB's authentication prompt can be bypassed by entering a sequence
|
||
of backspace characters.
|
||
</synopsis>
|
||
<product type="ebuild">grub</product>
|
||
<announced>2015-12-19</announced>
|
||
<revised count="1">2015-12-19</revised>
|
||
<bug>568326</bug>
|
||
<access>local</access>
|
||
<affected>
|
||
<package name="sys-boot/grub" auto="no" arch="*">
|
||
<unaffected range="ge">2.02_beta2-r8</unaffected>
|
||
<unaffected range="rge">0.97</unaffected>
|
||
<vulnerable range="lt">2.02_beta2-r8</vulnerable>
|
||
</package>
|
||
</affected>
|
||
<background>
|
||
<p>GNU GRUB is a multiboot boot loader used by most Linux systems.</p>
|
||
</background>
|
||
<description>
|
||
<p>An integer underflow in GRUB’s username/password authentication code
|
||
has been discovered.
|
||
</p>
|
||
</description>
|
||
<impact type="normal">
|
||
<p>An attacker with access to the system console may bypass the username
|
||
prompt by entering a sequence of backspace characters, allowing them e.g.
|
||
to get full access to GRUB’s console or to load a customized kernel.
|
||
</p>
|
||
</impact>
|
||
<workaround>
|
||
<p>There is no known workaround at this time.</p>
|
||
</workaround>
|
||
<resolution>
|
||
<p>All GRUB 2.x users should upgrade to the latest version:</p>
|
||
|
||
<code>
|
||
# emerge --sync
|
||
# emerge --ask --oneshot --verbose ">=sys-boot/grub-2.02_beta2-r8"
|
||
</code>
|
||
|
||
<p>After upgrading, make sure to run the grub2-install command with options
|
||
appropriate for your system. See the GRUB2 Quick Start guide in the
|
||
references below for examples. Your system will be vulnerable until this
|
||
action is performed.
|
||
</p>
|
||
</resolution>
|
||
<references>
|
||
<uri link="https://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-8370">CVE-2015-8370</uri>
|
||
<uri link="https://wiki.gentoo.org/wiki/GRUB2_Quick_Start">GRUB2 Quick
|
||
Start guide
|
||
</uri>
|
||
</references>
|
||
<metadata tag="requester" timestamp="2015-12-19T13:09:44Z">
|
||
keytoaster
|
||
</metadata>
|
||
<metadata tag="submitter" timestamp="2015-12-19T14:20:07Z">
|
||
keytoaster
|
||
</metadata>
|
||
</glsa>
|