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<?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="202107-19">
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<title>Jinja: Denial of service</title>
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<synopsis>An inefficient regular expression could be exploited to cause a
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Denial of Service condition.
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</synopsis>
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<product type="ebuild">jinja2</product>
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<announced>2021-07-08</announced>
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<revised count="1">2021-07-08</revised>
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<bug>768300</bug>
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<access>remote</access>
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<affected>
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<package name="dev-python/jinja" auto="yes" arch="*">
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<unaffected range="ge">2.11.3</unaffected>
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<vulnerable range="lt">2.11.3</vulnerable>
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</package>
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</affected>
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<background>
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<p>Jinja is a template engine written in pure Python.</p>
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</background>
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<description>
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<p>The ‘urlize’ filter in Jinja utilized an inefficient regular
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expression that could be exploited to consume excess CPU.
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</p>
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</description>
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<impact type="low">
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<p>An attacker could cause a Denial of Service condition via crafted input
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to the ‘urlize’ Jinja filter.
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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 Jinja 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 ">=dev-python/jinja-2.11.3"
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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/vuln/detail/CVE-2020-28493">CVE-2020-28493</uri>
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</references>
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<metadata tag="requester" timestamp="2021-05-31T21:46:47Z">whissi</metadata>
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<metadata tag="submitter" timestamp="2021-07-08T04:02:25Z">ajak</metadata>
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</glsa>
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