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Test ID:1.3.6.1.4.1.25623.1.0.844555
Category:Ubuntu Local Security Checks
Title:Ubuntu: Security Advisory (USN-4446-2)
Summary:The remote host is missing an update for the 'squid3' package(s) announced via the USN-4446-2 advisory.
Description:Summary:
The remote host is missing an update for the 'squid3' package(s) announced via the USN-4446-2 advisory.

Vulnerability Insight:
USN-4446-1 fixed vulnerabilities in Squid. The update introduced a
regression when using Squid with the icap or ecap protocols. This update
fixes the problem.

We apologize for the inconvenience.

Original advisory details:

Jeriko One discovered that Squid incorrectly handled caching certain
requests. A remote attacker could possibly use this issue to perform
cache-injection attacks or gain access to reverse proxy features such as
ESI. (CVE-2019-12520)

Jeriko One and Kristoffer Danielsson discovered that Squid incorrectly
handled certain URN requests. A remote attacker could possibly use this
issue to bypass access checks. (CVE-2019-12523)

Jeriko One discovered that Squid incorrectly handled URL decoding. A remote
attacker could possibly use this issue to bypass certain rule checks.
(CVE-2019-12524)

Jeriko One and Kristoffer Danielsson discovered that Squid incorrectly
handled input validation. A remote attacker could use this issue to cause
Squid to crash, resulting in a denial of service. (CVE-2019-18676)

Affected Software/OS:
'squid3' package(s) on Ubuntu 16.04, Ubuntu 18.04.

Solution:
Please install the updated package(s).

CVSS Score:
7.5

CVSS Vector:
AV:N/AC:L/Au:N/C:P/I:P/A:P

Cross-Ref: Common Vulnerability Exposure (CVE) ID: CVE-2019-12520
Debian Security Information: DSA-4682 (Google Search)
https://www.debian.org/security/2020/dsa-4682
http://www.squid-cache.org/Versions/v4/
http://www.squid-cache.org/Versions/v4/changesets/
https://github.com/squid-cache/squid/commits/v4
https://gitlab.com/jeriko.one/security/-/blob/master/squid/CVEs/CVE-2019-12520.txt
https://lists.debian.org/debian-lts-announce/2020/07/msg00009.html
https://usn.ubuntu.com/4446-1/
Common Vulnerability Exposure (CVE) ID: CVE-2019-12523
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UEMOYTMCCFWK5NOXSXEIH5D2VGWVXR67/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MTM74TU2BSLT5B3H4F3UDW53672NVLMC/
https://usn.ubuntu.com/4213-1/
Common Vulnerability Exposure (CVE) ID: CVE-2019-12524
https://gitlab.com/jeriko.one/security/-/blob/master/squid/CVEs/CVE-2019-12524.txt
Common Vulnerability Exposure (CVE) ID: CVE-2019-18676
https://github.com/squid-cache/squid/pull/275
CopyrightCopyright (C) 2020 Greenbone AG

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