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CVE-2019-12527

Status Candidate

Overview

An issue was discovered in Squid 4.0.23 through 4.7. When checking Basic Authentication with HttpHeader::getAuth, Squid uses a global buffer to store the decoded data. Squid does not check that the decoded length isn't greater than the buffer, leading to a heap-based buffer overflow with user controlled data.

Related Files

Red Hat Security Advisory 2019-2593-01
Posted Sep 2, 2019
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2019-2593-01 - Squid is a high-performance proxy caching server for web clients, supporting FTP, Gopher, and HTTP data objects. Issues addressed include a buffer overflow vulnerability.

tags | advisory, web, overflow
systems | linux, redhat
advisories | CVE-2019-12527
SHA-256 | ae38562107556cd0422ff52010969b12e31bfac7984742c1f543e664c4d7d7c4
Debian Security Advisory 4507-1
Posted Aug 26, 2019
Authored by Debian | Site debian.org

Debian Linux Security Advisory 4507-1 - Several vulnerabilities were discovered in Squid, a fully featured web proxy cache. The flaws in the HTTP Digest Authentication processing, the HTTP Basic Authentication processing and in the cachemgr.cgi allowed remote attackers to perform denial of service and cross-site scripting attacks, and potentially the execution of arbitrary code.

tags | advisory, remote, web, denial of service, arbitrary, cgi, vulnerability, xss
systems | linux, debian
advisories | CVE-2019-12525, CVE-2019-12527, CVE-2019-12529, CVE-2019-12854, CVE-2019-13345
SHA-256 | 102dff8cdfc700c7a5976e0e1116143994d1ce59068df780c80abd9cf39dc312
Ubuntu Security Notice USN-4065-1
Posted Jul 18, 2019
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4065-1 - It was discovered that Squid incorrectly handled Digest authentication. A remote attacker could possibly use this issue to cause Squid to crash, resulting in a denial of service. It was discovered that Squid incorrectly handled Basic authentication. A remote attacker could use this issue to cause Squid to crash, resulting in a denial of service, or possibly execute arbitrary code. This issue only affected Ubuntu 19.04. Various other issues were also addressed.

tags | advisory, remote, denial of service, arbitrary
systems | linux, ubuntu
advisories | CVE-2019-12525, CVE-2019-12527, CVE-2019-12529
SHA-256 | a8539b3cc79beff6e700e8c2b6380ce9def258a5a3fd8be174cc49a7546e02ba
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