Vulmon
Amazon Linux 2 Security Advisory: ALAS-2023-2065
Advisory Release Date: 2023-05-25 17:41 Pacific
Advisory Updated Date: 2023-06-01 23:37 Pacific
An issue was discovered in Squid before 4.9. When handling a URN request, a corresponding HTTP request is made. This HTTP request doesn't go through the access checks that incoming HTTP requests go through. This causes all access checks to be bypassed and allows access to restricted HTTP servers, e.g., an attacker can connect to HTTP servers that only listen on localhost. (CVE-2019-12523)
An issue was discovered in Squid 3.x and 4.x through 4.8. Due to incorrect input validation, there is a heap-based buffer overflow that can result in Denial of Service to all clients using the proxy. Severity is high due to this vulnerability occurring before normal security checks; any remote client that can reach the proxy port can trivially perform the attack via a crafted URI scheme. (CVE-2019-18676)
Affected Packages:
squid
Issue Correction:
Run yum update squid to update your system.
aarch64:
squid-3.5.20-17.amzn2.7.5.aarch64
squid-sysvinit-3.5.20-17.amzn2.7.5.aarch64
squid-migration-script-3.5.20-17.amzn2.7.5.aarch64
squid-debuginfo-3.5.20-17.amzn2.7.5.aarch64
i686:
squid-3.5.20-17.amzn2.7.5.i686
squid-sysvinit-3.5.20-17.amzn2.7.5.i686
squid-migration-script-3.5.20-17.amzn2.7.5.i686
squid-debuginfo-3.5.20-17.amzn2.7.5.i686
src:
squid-3.5.20-17.amzn2.7.5.src
x86_64:
squid-3.5.20-17.amzn2.7.5.x86_64
squid-sysvinit-3.5.20-17.amzn2.7.5.x86_64
squid-migration-script-3.5.20-17.amzn2.7.5.x86_64
squid-debuginfo-3.5.20-17.amzn2.7.5.x86_64