Important: squid security update

Topic

An update for squid is now available for Red Hat Enterprise Linux 9.

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: Denial of Service in SSL Certificate validation (CVE-2023-46724)
• squid: NULL pointer dereference in the gopher protocol code (CVE-2023-46728)
• squid: Buffer over-read in the HTTP Message processing feature (CVE-2023-49285)
• squid: Incorrect Check of Function Return Value In Helper Process management (CVE-2023-49286)

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.

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

After installing this update, the squid service will be restarted automatically.

Affected Products

• Red Hat Enterprise Linux for x86_64 9 x86_64
• Red Hat Enterprise Linux for IBM z Systems 9 s390x
• Red Hat Enterprise Linux for Power, little endian 9 ppc64le
• Red Hat Enterprise Linux for ARM 64 9 aarch64

Fixes

• BZ - 2247567 - CVE-2023-46724 squid: Denial of Service in SSL Certificate validation
• BZ - 2248521 - CVE-2023-46728 squid: NULL pointer dereference in the gopher protocol code
• BZ - 2252923 - CVE-2023-49286 squid: Incorrect Check of Function Return Value In Helper Process management
• BZ - 2252926 - CVE-2023-49285 squid: Buffer over-read in the HTTP Message processing feature

CVEs

• CVE-2023-46724
• CVE-2023-46728
• CVE-2023-49285
• CVE-2023-49286

References

• https://access.redhat.com/security/updates/classification/#important