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CVE-2020-11945

Status Candidate

Overview

An issue was discovered in Squid before 5.0.2. A remote attacker can replay a sniffed Digest Authentication nonce to gain access to resources that are otherwise forbidden. This occurs because the attacker can overflow the nonce reference counter (a short integer). Remote code execution may occur if the pooled token credentials are freed (instead of replayed as valid credentials).

Related Files

Ubuntu Security Notice USN-4356-1
Posted May 13, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4356-1 - Jeriko One discovered that Squid incorrectly handled certain Edge Side Includes responses. A malicious remote server could cause Squid to crash, possibly poison the cache, or possibly execute arbitrary code. It was discovered that Squid incorrectly handled the hostname parameter to cachemgr.cgi when certain browsers are used. A remote attacker could possibly use this issue to inject HTML or invalid characters in the hostname parameter. This issue only affected Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, and Ubuntu 19.10. Various other issues were also addressed.

tags | advisory, remote, arbitrary, cgi
systems | linux, ubuntu
advisories | CVE-2019-12519, CVE-2019-18860, CVE-2020-11945
SHA-256 | 960fef25aa8c71a4e17e850351da212e243879b78cfe6f657b38729f18431115
Gentoo Linux Security Advisory 202005-05
Posted May 13, 2020
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory 202005-5 - Multiple vulnerabilities have been found in Squid, the worst of which could result in the arbitrary execution of code. Versions less than 4.11 are affected.

tags | advisory, arbitrary, vulnerability
systems | linux, gentoo
advisories | CVE-2019-12519, CVE-2019-12521, CVE-2020-11945
SHA-256 | f86a32f4b05bd5ead7ea9b9b8aecfcac7e286aa57a83dda6bfa09afe82284eea
Red Hat Security Advisory 2020-2040-01
Posted May 6, 2020
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2020-2040-01 - Squid is a high-performance proxy caching server for web clients, supporting FTP, Gopher, and HTTP data objects. Issues addressed include buffer overflow and code execution vulnerabilities.

tags | advisory, web, overflow, vulnerability, code execution
systems | linux, redhat
advisories | CVE-2019-12519, CVE-2019-12525, CVE-2020-11945
SHA-256 | f5d0d691bcd4e3bccb003c0144cfd40493f2cf3e92af0df28263bb2aff8a7309
Red Hat Security Advisory 2020-2041-01
Posted May 6, 2020
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2020-2041-01 - Squid is a high-performance proxy caching server for web clients, supporting FTP, Gopher, and HTTP data objects. Issues addressed include buffer overflow and code execution vulnerabilities.

tags | advisory, web, overflow, vulnerability, code execution
systems | linux, redhat
advisories | CVE-2019-12519, CVE-2019-12525, CVE-2020-11945
SHA-256 | 5c589ca7b830ef3a7aecec9c71350ca36d1edcdb36e7f0e9b935ab81d6d68486
Red Hat Security Advisory 2020-2038-01
Posted May 6, 2020
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2020-2038-01 - Squid is a high-performance proxy caching server for web clients, supporting FTP, Gopher, and HTTP data objects. Issues addressed include buffer overflow and code execution vulnerabilities.

tags | advisory, web, overflow, vulnerability, code execution
systems | linux, redhat
advisories | CVE-2019-12519, CVE-2020-11945
SHA-256 | 3f722a63836106511507bb2d5972bba7eca0bcb1d0cde645a9d6478f10d6e6a8
Red Hat Security Advisory 2020-2039-01
Posted May 6, 2020
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2020-2039-01 - Squid is a high-performance proxy caching server for web clients, supporting FTP, Gopher, and HTTP data objects. Issues addressed include buffer overflow and code execution vulnerabilities.

tags | advisory, web, overflow, vulnerability, code execution
systems | linux, redhat
advisories | CVE-2019-12519, CVE-2020-11945
SHA-256 | d7a0425d736d549b3e44af90f1d7bab92776180a01c6a0329ce825726cb1db6c
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