gentoo-overlay/metadata/glsa/glsa-202012-21.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="202012-21">
  <title>Mozilla Network Security Service (NSS): Denial of service</title>
  <synopsis>A vulnerability in NSS might allow remote attackers to cause a
    Denial of Service condition.
  </synopsis>
  <product type="ebuild">nss</product>
  <announced>2020-12-23</announced>
  <revised count="1">2020-12-23</revised>
  <bug>750254</bug>
  <access>remote</access>
  <affected>
    <package name="dev-libs/nss" auto="yes" arch="*">
      <unaffected range="ge">3.58</unaffected>
      <vulnerable range="lt">3.58</vulnerable>
    </package>
  </affected>
  <background>
    <p>The Mozilla Network Security Service (NSS) is a library implementing
      security features like SSL v.2/v.3, TLS, PKCS #5, PKCS #7, PKCS #11, PKCS
      #12, S/MIME and X.509 certificates.
    </p>
  </background>
  <description>
    <p>A flaw was found in the way Mozilla Network Security Service (NSS)
      handled CCS (ChangeCipherSpec) messages in TLS 1.3.
    </p>
  </description>
  <impact type="low">
    <p>A remote attacker could send multiple crafted CSS messages in row after
      ClientHello message to a server application linked against NSS library,
      possibly resulting in a Denial of Service condition.
    </p>
  </impact>
  <workaround>
    <p>Disable TLS 1.3 protocol.</p>
  </workaround>
  <resolution>
    <p>All NSS users should upgrade to the latest version:</p>
    
    <code>
      # emerge --sync
      # emerge --ask --oneshot --verbose "&gt;=dev-libs/nss-3.58"
    </code>
    
  </resolution>
  <references>
    <uri link="https://nvd.nist.gov/vuln/detail/CVE-2020-25648">CVE-2020-25648</uri>
  </references>
  <metadata tag="requester" timestamp="2020-12-22T23:13:35Z">whissi</metadata>
  <metadata tag="submitter" timestamp="2020-12-23T19:58:04Z">whissi</metadata>
</glsa>