high
8.6
CWE
667
Advisory Published
Updated

CVE-2020-24606

First published: Mon Aug 24 2020(Updated: )

Squid before 4.13 and 5.x before 5.0.4 allows a trusted peer to perform Denial of Service by consuming all available CPU cycles during handling of a crafted Cache Digest response message. This only occurs when cache_peer is used with the cache digests feature. The problem exists because peerDigestHandleReply() livelocking in peer_digest.cc mishandles EOF.

Credit: cve@mitre.org cve@mitre.org

Affected SoftwareAffected VersionHow to fix
debian/squid<=4.6-1<=4.12-1<=4.6-1+deb10u3
4.13-1
4.6-1+deb10u4
Squid-Cache Squid>=3.0<4.13
Squid-Cache Squid>=5.0.1<5.0.4
Canonical Ubuntu Linux=16.04
Canonical Ubuntu Linux=18.04
Canonical Ubuntu Linux=20.04
Debian Debian Linux=9.0
Debian Debian Linux=10.0
Fedoraproject Fedora=31
Fedoraproject Fedora=32
Fedoraproject Fedora=33
openSUSE Leap=15.1
openSUSE Leap=15.2
IBM Security Guardium<=10.5
IBM Security Guardium<=10.6
IBM Security Guardium<=11.0
IBM Security Guardium<=11.1
IBM Security Guardium<=11.2
IBM Security Guardium<=11.3
ubuntu/squid<4.10-1ubuntu1.2
4.10-1ubuntu1.2
ubuntu/squid<4.13-1ubuntu1
4.13-1ubuntu1
ubuntu/squid<4.13-1ubuntu1
4.13-1ubuntu1
ubuntu/squid3<3.5.27-1ubuntu1.9
3.5.27-1ubuntu1.9
ubuntu/squid3<3.5.12-1ubuntu7.15
3.5.12-1ubuntu7.15
debian/squid
4.6-1+deb10u7
4.6-1+deb10u10
4.13-10+deb11u2
4.13-10+deb11u3
5.7-2
5.7-2+deb12u1
6.6-1
6.9-1

Remedy

http://www.squid-cache.org/Versions/v4/changesets/SQUID-2020_9.patch

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is CVE-2020-24606?

    CVE-2020-24606 is a vulnerability in Squid, a cache proxy server, that allows a trusted peer to perform a Denial of Service attack by consuming all available CPU cycles.

  • Which versions of Squid are affected by CVE-2020-24606?

    Squid versions before 4.13 and 5.x before 5.0.4 are affected by CVE-2020-24606.

  • How severe is CVE-2020-24606?

    CVE-2020-24606 has a severity rating of 8.6 (high).

  • What is the recommended fix for CVE-2020-24606?

    To fix CVE-2020-24606, it is recommended to update Squid to version 4.13 or 5.0.4 or later.

  • Where can I find more information about CVE-2020-24606?

    More information about CVE-2020-24606 can be found on the official Squid website and the OpenSUSE security announcements.

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