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CVE-2020-8517

Status Candidate

Overview

An issue was discovered in Squid before 4.10. Due to incorrect input validation, the NTLM authentication credentials parser in ext_lm_group_acl may write to memory outside the credentials buffer. On systems with memory access protections, this can result in the helper process being terminated unexpectedly. This leads to the Squid process also terminating and a denial of service for all clients using the proxy.

Related Files

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
SHA-256 | 75240e0416b3fb5f8be101638fda3295dca71eb0dee0fffeb95657098130ceb0
Ubuntu Security Notice USN-4289-1
Posted Feb 20, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4289-1 - Jeriko One discovered that Squid incorrectly handled memory when connected to an FTP server. A remote attacker could possibly use this issue to obtain sensitive information from Squid memory. Regis Leroy discovered that Squid incorrectly handled certain HTTP requests. A remote attacker could possibly use this issue to access server resources prohibited by earlier security filters. Guido Vranken discovered that Squid incorrectly handled certain buffer operations when acting as a reverse proxy. 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, web, denial of service, arbitrary
systems | linux, ubuntu
advisories | CVE-2019-12528, CVE-2020-8449, CVE-2020-8450, CVE-2020-8517
SHA-256 | 1313e86585d39f29af765e7595c60e6ae63b933823da6dd69399de2b01187107
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