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62 lines
2.2 KiB
62 lines
2.2 KiB
<?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="201701-31">
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<title>flex: Potential insecure code generation</title>
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<synopsis>Flex might generate code with a buffer overflow making applications
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using such scanners vulnerable to the execution of arbitrary code.
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</synopsis>
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<product type="ebuild">flex</product>
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<announced>2017-01-11</announced>
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<revised count="1">2017-01-11</revised>
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<bug>589820</bug>
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<access>remote</access>
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<affected>
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<package name="sys-devel/flex" auto="yes" arch="*">
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<unaffected range="ge">2.6.1</unaffected>
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<vulnerable range="lt">2.6.1</vulnerable>
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</package>
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</affected>
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<background>
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<p>flex is a programming tool used to generate scanners (programs which
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recognize lexical patterns in text).
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</p>
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</background>
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<description>
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<p>A heap-based buffer overflow in the yy_get_next_buffer function in Flex
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might allow context-dependent attackers to cause a denial of service or
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possibly execute arbitrary code via vectors involving num_to_read.
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</p>
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</description>
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<impact type="normal">
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<p>Context-dependent attackers could cause a Denial of Service condition or
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possibly execute arbitrary code with the privileges of the process.
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</p>
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</impact>
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<workaround>
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<p>There is no known workaround at this time.</p>
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</workaround>
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<resolution>
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<p>All flex users should upgrade to the latest version:</p>
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<code>
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# emerge --sync
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# emerge --ask --oneshot --verbose ">=sys-devel/flex-2.6.1"
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</code>
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<p>Packages which depend on flex may need to be recompiled. Tools such as
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qdepends (included in app-portage/portage-utils) may assist in
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identifying these packages:
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</p>
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<code>
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# emerge --oneshot --ask --verbose $(qdepends -CQ sys-devel/flex | sed
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's/^/=/')
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</code>
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</resolution>
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<references>
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<uri link="https://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-6354">CVE-2016-6354</uri>
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</references>
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<metadata tag="requester" timestamp="2017-01-09T14:07:40Z">whissi</metadata>
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<metadata tag="submitter" timestamp="2017-01-11T12:41:44Z">whissi</metadata>
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</glsa>
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