71 lines
2.4 KiB
XML
71 lines
2.4 KiB
XML
<?xml version="1.0" encoding="utf-8"?>
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<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
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<glsa id="200501-23">
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<title>Exim: Two buffer overflows</title>
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<synopsis>
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Buffer overflow vulnerabilities, which could lead to arbitrary code
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execution, have been found in the handling of IPv6 addresses as well as in
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the SPA authentication mechanism in Exim.
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</synopsis>
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<product type="ebuild">exim</product>
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<announced>2005-01-12</announced>
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<revised count="01">2005-01-12</revised>
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<bug>76893</bug>
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<access>remote</access>
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<affected>
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<package name="mail-mta/exim" auto="yes" arch="*">
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<unaffected range="ge">4.43-r2</unaffected>
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<vulnerable range="lt">4.43-r2</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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Exim is an highly configurable message transfer agent (MTA)
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developed at the University of Cambridge.
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</p>
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</background>
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<description>
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<p>
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Buffer overflows have been found in the host_aton() function
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(CAN-2005-0021) as well as in the spa_base64_to_bits() function
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(CAN-2005-0022), which is part of the SPA authentication code.
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</p>
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</description>
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<impact type="high">
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<p>
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A local attacker could trigger the buffer overflow in host_aton()
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by supplying an illegal IPv6 address with more than 8 components, using
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a command line option. The second vulnerability could be remotely
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exploited during SPA authentication, if it is enabled on the server.
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Both buffer overflows can potentially lead to the execution of
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arbitrary code.
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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 known workaround at this time.
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</p>
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</workaround>
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<resolution>
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<p>
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All Exim users should upgrade to the latest version:
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</p>
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<code>
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# emerge --sync
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# emerge --ask --oneshot --verbose ">=mail-mta/exim-4.43-r2"</code>
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</resolution>
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<references>
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<uri link="https://www.exim.org/mail-archives/exim-announce/2005/msg00000.html">Exim Announcement</uri>
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<uri link="https://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0021">CAN-2005-0021</uri>
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<uri link="https://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0022">CAN-2005-0022</uri>
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</references>
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<metadata tag="requester" timestamp="2005-01-10T09:24:16Z">
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koon
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</metadata>
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<metadata tag="submitter" timestamp="2005-01-10T10:01:20Z">
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vorlon078
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</metadata>
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<metadata tag="bugReady" timestamp="2005-01-12T21:52:22Z">
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koon
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</metadata>
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</glsa>
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