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CVE-2019-12526

Status Candidate

Overview

An issue was discovered in Squid before 4.9. URN response handling in Squid suffers from a heap-based buffer overflow. When receiving data from a remote server in response to an URN request, Squid fails to ensure that the response can fit within the buffer. This leads to attacker controlled data overflowing in the heap.

Related Files

Red Hat Security Advisory 2020-4743-01
Posted Nov 4, 2020
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2020-4743-01 - Squid is a high-performance proxy caching server for web clients, supporting FTP, Gopher, and HTTP data objects. Issues addressed include buffer overflow, bypass, cross site request forgery, denial of service, heap overflow, information leakage, and out of bounds read vulnerabilities.

tags | advisory, web, denial of service, overflow, vulnerability, csrf
systems | linux, redhat
advisories | CVE-2019-12520, CVE-2019-12521, CVE-2019-12523, CVE-2019-12524, CVE-2019-12526, CVE-2019-12528, CVE-2019-12529, CVE-2019-12854, CVE-2019-18676, CVE-2019-18677, CVE-2019-18678, CVE-2019-18679, CVE-2019-18860, CVE-2020-14058, CVE-2020-15049, CVE-2020-24606, CVE-2020-8449, CVE-2020-8450
MD5 | 9d6e01336e2e2755764b1fc2058759d5
Gentoo Linux Security Advisory 202003-34
Posted Mar 16, 2020
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory 202003-34 - Multiple vulnerabilities have been found in Squid, the worst of which could lead to arbitrary code execution. Versions less than 4.10 are affected.

tags | advisory, arbitrary, vulnerability, code execution
systems | linux, gentoo
advisories | CVE-2019-12526, CVE-2019-12528, CVE-2019-18678, CVE-2019-18679, CVE-2020-8449, CVE-2020-8450, CVE-2020-8517
MD5 | 8f7b8d365da0caff859f70562d93266c
Ubuntu Security Notice USN-4213-1
Posted Dec 4, 2019
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4213-1 - 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 and access restricted servers. This issue was only addressed in Ubuntu 19.04 and Ubuntu 19.10. Jeriko One discovered that Squid incorrectly handed URN responses. A remote attacker could use this issue to cause Squid to crash, resulting in a denial of service, or possibly execute arbitrary code. Various other issues were also addressed.

tags | advisory, remote, denial of service, arbitrary
systems | linux, ubuntu
advisories | CVE-2019-12523, CVE-2019-12526, CVE-2019-12854, CVE-2019-18676, CVE-2019-18677, CVE-2019-18678, CVE-2019-18679
MD5 | 7bbae365187bfb36c6c93c9790cd822a
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