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Vulnerability of Squid: information disclosure via Basic Authentication uudecode

Synthesis of the vulnerability 

An attacker can bypass access restrictions to data via Basic Authentication uudecode of Squid, in order to obtain sensitive information.
Vulnerable systems: Debian, openSUSE Leap, Solaris, Squid, SUSE Linux Enterprise Desktop, SLES, Ubuntu.
Severity of this threat: 2/4.
Creation date: 12/07/2019.
Références of this weakness: CERTFR-2019-AVI-332, CVE-2019-12529, DLA-1858-1, DSA-4507-1, openSUSE-SU-2019:2540-1, openSUSE-SU-2019:2541-1, SQUID-2019:2, SUSE-SU-2019:2089-1, SUSE-SU-2019:2975-1, USN-4065-1, USN-4065-2, VIGILANCE-VUL-29762.

Description of the vulnerability 

An attacker can bypass access restrictions to data via Basic Authentication uudecode of Squid, in order to obtain sensitive information.
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This security alert impacts software or systems such as Debian, openSUSE Leap, Solaris, Squid, SUSE Linux Enterprise Desktop, SLES, Ubuntu.

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

The trust level is of type confirmed by the editor, with an origin of intranet client.

An attacker with a expert ability can exploit this security announce.

Solutions for this threat 

Squid cache: version 4.8.
The version 4.8 is fixed:
  http://www.squid-cache.org/Versions/v4/

Squid: patch for Basic Authentication uudecode.
A patch is indicated in information sources.

Debian 10: new squid packages.
New packages are available:
  Debian 10: squid 4.6-1+deb10u1

Debian 8: new squid3 packages.
New packages are available:
  Debian 8: squid3 3.4.8-6+deb8u8

openSUSE Leap 15: new squid packages (22/11/2019).
New packages are available:
  openSUSE Leap 15.0: squid 4.9-lp150.13.1
  openSUSE Leap 15.1: squid 4.9-lp151.2.7.1

Oracle Solaris: patch for third party software of October 2019 v2.
A patch is available:
  https://support.oracle.com/rs?type=doc&id=1448883.1

SUSE LE 12: new squid packages.
New packages are available:
  SUSE LE 12 SP2: squid 3.5.21-26.17.1
  SUSE LE 12 SP3: squid 3.5.21-26.17.1
  SUSE LE 12 SP4: squid 3.5.21-26.17.1

SUSE LE 15: new squid packages (15/11/2019).
New packages are available:
  SUSE LE 15 RTM: squid 4.9-5.11.1
  SUSE LE 15 SP1: squid 4.9-5.11.1

Ubuntu 12.04: new squid3 packages.
New packages are available:
  Ubuntu 12.04 ESM: squid3 3.1.19-1ubuntu3.12.04.10

Ubuntu: new squid packages.
New packages are available:
  Ubuntu 19.04: squid 4.4-1ubuntu2.2
  Ubuntu 18.04 LTS: squid3 3.5.27-1ubuntu1.3
  Ubuntu 16.04 LTS: squid3 3.5.12-1ubuntu7.8
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