RHSA-2020:2039 — Security Advisory
Red Hat Security Advisory: squid:4 security update
Severity
ImportantRed Hat Product Security
Products
Official CSAF product identity
Published · May 6, 2020
Updated · November 22, 2025
Topic
An update for the squid:4 module is now available for Red Hat Enterprise Linux 8.1 Extended Update Support.
Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Description
Squid is a high-performance proxy caching server for web clients, supporting FTP, Gopher, and HTTP data objects.
Security Fix(es):
-
squid: improper check for new member in ESIExpression::Evaluate allows for stack buffer overflow (CVE-2019-12519)
-
squid: improper access restriction upon Digest Authentication nonce replay could lead to remote code execution (CVE-2020-11945)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.