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<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="202012-22">
<title>HAProxy: Arbitrary code execution</title>
<synopsis>A buffer overflow in HAProxy might allow an attacker to execute
arbitrary code.
</synopsis>
<product type="ebuild">haproxy</product>
<announced>2020-12-24</announced>
<revised count="1">2020-12-24</revised>
<bug>715944</bug>
<access>remote</access>
<affected>
<package name="net-proxy/haproxy" auto="yes" arch="*">
<unaffected range="ge" slot="0/2.0">2.0.13</unaffected>
<unaffected range="ge">2.1.4</unaffected>
<vulnerable range="lt">2.1.4</vulnerable>
</package>
</affected>
<background>
<p>HAProxy is a TCP/HTTP reverse proxy for high availability environments.</p>
</background>
<description>
<p>It was discovered that HAProxy incorrectly handled certain HTTP/2
headers.
</p>
</description>
<impact type="normal">
<p>A remote attacker, by sending a specially crafted HTTP/2 request, could
possibly execute arbitrary code with the privileges of the process, or
cause a Denial of Service condition.
</p>
</impact>
<workaround>
<p>Disable HTTP/2 support.</p>
</workaround>
<resolution>
<p>All HAProxy 2.0.x users should upgrade to the latest version:</p>
<code>
# emerge --sync
# emerge --ask --oneshot --verbose ">=net-proxy/haproxy-2.0.13:0/2.0"
</code>
<p>All other HAProxy users should upgrade to the latest version:</p>
<code>
# emerge --sync
# emerge --ask --oneshot --verbose ">=net-proxy/haproxy-2.1.4"
</code>
</resolution>
<references>
<uri link="https://nvd.nist.gov/vuln/detail/CVE-2020-11100">CVE-2020-11100</uri>
</references>
<metadata tag="requester" timestamp="2020-05-20T16:01:15Z">sam_c</metadata>
<metadata tag="submitter" timestamp="2020-12-24T14:09:42Z">sam_c</metadata>
</glsa>
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