<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="202105-07">
  <title>Telegram: Security bypass</title>
  <synopsis>An insufficient session expiration has been reported in Telegram.</synopsis>
  <product type="ebuild">telegram</product>
  <announced>2021-05-26</announced>
  <revised count="1">2021-05-26</revised>
  <bug>771684</bug>
  <access>remote</access>
  <affected>
    <package name="net-im/telegram-desktop" auto="yes" arch="*">
      <unaffected range="ge">2.4.11</unaffected>
      <vulnerable range="lt">2.4.11</vulnerable>
    </package>
    <package name="net-im/telegram-desktop-bin" auto="yes" arch="*">
      <unaffected range="ge">2.4.11</unaffected>
      <vulnerable range="lt">2.4.11</vulnerable>
    </package>
  </affected>
  <background>
    <p>Telegram is a cloud-based mobile and desktop messaging app with a focus
      on security and speed.
    </p>
  </background>
  <description>
    <p>It was discovered that Telegram failed to invalidate a recently active
      session.
    </p>
  </description>
  <impact type="low">
    <p>Please review the referenced CVE identifiers for details.</p>
  </impact>
  <workaround>
    <p>There is no known workaround at this time.</p>
  </workaround>
  <resolution>
    <p>All Telegram users should upgrade to the latest version:</p>
    
    <code>
      # emerge --sync
      # emerge --ask --oneshot --verbose "&gt;=net-im/telegram-desktop-2.4.11"
    </code>
    
    <p>All Telegram binary users should upgrade to the latest version:</p>
    
    <code>
      # emerge --sync
      # emerge --ask --oneshot --verbose
      "&gt;=net-im/telegram-desktop-bin-2.4.11"
    </code>
    
  </resolution>
  <references>
    <uri link="https://nvd.nist.gov/vuln/detail/CVE-2021-27351">CVE-2021-27351</uri>
  </references>
  <metadata tag="requester" timestamp="2021-05-25T20:11:43Z">whissi</metadata>
  <metadata tag="submitter" timestamp="2021-05-26T08:12:28Z">whissi</metadata>
</glsa>
