glsa-202107-19.xml


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<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="202107-19">
  <title>Jinja: Denial of service</title>
  <synopsis>An inefficient regular expression could be exploited to cause a
    Denial of Service condition.
  </synopsis>
  <product type="ebuild">jinja2</product>
  <announced>2021-07-08</announced>
  <revised count="1">2021-07-08</revised>
  <bug>768300</bug>
  <access>remote</access>
  <affected>
    <package name="dev-python/jinja" auto="yes" arch="*">
      <unaffected range="ge">2.11.3</unaffected>
      <vulnerable range="lt">2.11.3</vulnerable>
    </package>
  </affected>
  <background>
    <p>Jinja is a template engine written in pure Python.</p>
  </background>
  <description>
    <p>The ‘urlize’ filter in Jinja utilized an inefficient regular
      expression that could be exploited to consume excess CPU.
    </p>
  </description>
  <impact type="low">
    <p>An attacker could cause a Denial of Service condition via crafted input
      to the ‘urlize’ Jinja filter.
    </p>
  </impact>
  <workaround>
    <p>There is no known workaround at this time.</p>
  </workaround>
  <resolution>
    <p>All Jinja users should upgrade to the latest version:</p>
    
    <code>
      # emerge --sync
      # emerge --ask --oneshot --verbose "&gt;=dev-python/jinja-2.11.3"
    </code>
  </resolution>
  <references>
    <uri link="https://nvd.nist.gov/vuln/detail/CVE-2020-28493">CVE-2020-28493</uri>
  </references>
  <metadata tag="requester" timestamp="2021-05-31T21:46:47Z">whissi</metadata>
  <metadata tag="submitter" timestamp="2021-07-08T04:02:25Z">ajak</metadata>
</glsa>