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Vulnerability of Squid cache: integer overflow via the HTTP Digest authentication

Synthesis of the vulnerability 

An attacker can trigger an integer overflow via the HTTP Digest authentication in Squid cache, in order to trigger a denial of service, and possibly to run code.
Vulnerable products: Debian, Fedora, openSUSE Leap, RHEL, Squid, SUSE Linux Enterprise Desktop, SLES, Ubuntu.
Severity of this weakness: 2/4.
Creation date: 23/04/2020.
Références of this bulletin: CERTFR-2020-AVI-239, CVE-2020-11945, DLA-2278-1, DLA-2278-2, DLA-2278-3, DSA-4682-1, FEDORA-2020-56e809930e, FEDORA-2020-848065cc4c, FEDORA-2020-a6a921a591, openSUSE-SU-2020:0623-1, RHSA-2020:2038-01, RHSA-2020:2039-01, RHSA-2020:2040-01, RHSA-2020:2041-01, SQUID-2019:12, SQUID-2020:4, SUSE-SU-2020:1134-1, SUSE-SU-2020:1156-1, SUSE-SU-2020:1227-1, SUSE-SU-2020:14460-1, USN-4356-1, VIGILANCE-VUL-32088.

Description of the vulnerability 

An attacker can trigger an integer overflow via the HTTP Digest authentication in Squid cache, in order to trigger a denial of service, and possibly to run code.
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This cybersecurity note impacts software or systems such as Debian, Fedora, openSUSE Leap, RHEL, Squid, SUSE Linux Enterprise Desktop, SLES, Ubuntu.

Our Vigil@nce team determined that the severity of this computer weakness announce is medium.

The trust level is of type confirmed by the editor, with an origin of internet server.

An attacker with a expert ability can exploit this cybersecurity vulnerability.

Solutions for this threat 

Squid cache: version 4.11.
The version 4.11 is fixed:
  http://www.squid-cache.org/Versions/v4/squid-4.11.tar.gz

Debian 10: new squid packages.
New packages are available:
  Debian 10: squid 4.6-1+deb10u2

Debian 9: new squid3 packages.
New packages are available:
  Debian 9: squid3 3.5.23-5+deb9u4

Fedora 30-31: new squid packages.
New packages are available:
  Fedora 30: squid 4.11-1.fc30
  Fedora 31: squid 4.11-1.fc31

Fedora 32: new squid packages.
New packages are available:
  Fedora 32: squid 4.11-1.fc32

openSUSE Leap 15.1: new squid packages (11/05/2020).
New packages are available:
  openSUSE Leap 15.1: squid 4.11-lp151.2.15.2

RHEL 7: new squid packages.
New packages are available:
  RHEL 7.8: squid 3.5.20-15.el7_8.1

RHEL 8: new squid packages.
New packages are available:
  RHEL 8.0: squid 4.4-5.module+el8.0.0+6430+d78e5241.1
  RHEL 8.1: squid 4.4-8.module+el8.1.0+6436+af881f9b.1
  RHEL 8.2: squid 4.4-8.module+el8.2.0+6449+6ba3df3e.1

SUSE LE 11 SP3-4: new squid3 packages.
New packages are available:
  SUSE LE 11 SP3: squid3 3.1.23-8.16.37.12.1
  SUSE LE 11 SP4: squid3 3.1.23-8.16.37.12.1

SUSE LE 12: new squid packages.
New packages are available:
  SUSE LE 12 SP4: squid 3.5.21-26.23.1
  SUSE LE 12 SP3: squid 3.5.21-26.23.1
  SUSE LE 12 SP2: squid 3.5.21-26.23.1

SUSE LE 12 SP5: new squid packages (30/04/2020).
New packages are available:
  SUSE LE 12 SP5: squid 4.11-4.9.1

SUSE LE 15 SP1/2: new squid packages.
New packages are available:
  SUSE LE 15 SP1: squid 4.11-5.17.2
  SUSE LE 15 SP2: squid 4.11-5.17.2

Ubuntu: new squid packages.
New packages are available:
  Ubuntu 20.04 LTS: squid 4.10-1ubuntu1.1
  Ubuntu 19.10: squid 4.8-1ubuntu2.3
  Ubuntu 18.04 LTS: squid 3.5.27-1ubuntu1.6
  Ubuntu 16.04 LTS: squid 3.5.12-1ubuntu7.11
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