Vulmon
Amazon Linux 2 Security Advisory: ALAS-2024-2509
Advisory Release Date: 2024-03-27 21:32 Pacific
Advisory Updated Date: 2024-03-27 21:32 Pacific
A flaw was found in squid. When Squid is parsing ESI, it keeps the ESI elements in ESIContext. ESIContext contains a buffer for holding a stack of ESIElements. When a new ESIElement is parsed, it is added via addStackElement. addStackElement has a check for the number of elements in this buffer, but it's off by 1, leading to a Heap Overflow of 1 element. The overflow is within the same structure so it can't affect adjacent memory blocks, and thus just leads to a crash while processing. (CVE-2019-12521)
Due to chunked decoder lenience Squid is vulnerable to Request/Response smuggling attacks when parsing HTTP/1.1 and ICAP messages. (CVE-2023-46846)
Affected Packages:
squid
Note:
This advisory is applicable to Amazon Linux 2 (AL2) Core repository. Visit this FAQ section for the difference between AL2 Core and AL2 Extras advisories.
Issue Correction:
Run yum update squid to update your system.
aarch64:
squid-3.5.20-17.amzn2.7.20.aarch64
squid-sysvinit-3.5.20-17.amzn2.7.20.aarch64
squid-migration-script-3.5.20-17.amzn2.7.20.aarch64
squid-debuginfo-3.5.20-17.amzn2.7.20.aarch64
i686:
squid-3.5.20-17.amzn2.7.20.i686
squid-sysvinit-3.5.20-17.amzn2.7.20.i686
squid-migration-script-3.5.20-17.amzn2.7.20.i686
squid-debuginfo-3.5.20-17.amzn2.7.20.i686
src:
squid-3.5.20-17.amzn2.7.20.src
x86_64:
squid-3.5.20-17.amzn2.7.20.x86_64
squid-sysvinit-3.5.20-17.amzn2.7.20.x86_64
squid-migration-script-3.5.20-17.amzn2.7.20.x86_64
squid-debuginfo-3.5.20-17.amzn2.7.20.x86_64