USN-5891-1: curl vulnerabilities

Releases

• Ubuntu 22.10
• Ubuntu 22.04 LTS
• Ubuntu 20.04 LTS
• Ubuntu 18.04 ESM

Packages

• curl - HTTP, HTTPS, and FTP client and client libraries

Details

Harry Sintonen discovered that curl incorrectly handled HSTS support
when multiple URLs are requested serially. A remote attacker could possibly
use this issue to cause curl to use unencrypted connections. This issue
only affected Ubuntu 22.04 LTS, and Ubuntu 22.10. (CVE-2023-23914)

Harry Sintonen discovered that curl incorrectly handled HSTS support
when multiple URLs are requested in parallel. A remote attacker could
possibly use this issue to cause curl to use unencrypted connections. This
issue only affected Ubuntu 22.04 LTS, and Ubuntu 22.10. (CVE-2023-23915)

Patrick Monnerat discovered that curl incorrectly handled memory when
processing requests with multi-header compression. A remote attacker could
possibly use this issue to cause curl to consume resources, leading to a
denial of service. (CVE-2023-23916)

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 22.10

• libcurl3-gnutls - 7.85.0-1ubuntu0.3
• libcurl3-nss - 7.85.0-1ubuntu0.3
• libcurl4 - 7.85.0-1ubuntu0.3
• curl - 7.85.0-1ubuntu0.3

Ubuntu 22.04

• libcurl3-gnutls - 7.81.0-1ubuntu1.8
• libcurl3-nss - 7.81.0-1ubuntu1.8
• libcurl4 - 7.81.0-1ubuntu1.8
• curl - 7.81.0-1ubuntu1.8

Ubuntu 20.04

• libcurl3-gnutls - 7.68.0-1ubuntu2.16
• libcurl3-nss - 7.68.0-1ubuntu2.16
• libcurl4 - 7.68.0-1ubuntu2.16
• curl - 7.68.0-1ubuntu2.16

Ubuntu 18.04

• libcurl3-gnutls - 7.58.0-2ubuntu3.23
• libcurl3-nss - 7.58.0-2ubuntu3.23
• libcurl4 - 7.58.0-2ubuntu3.23
• curl - 7.58.0-2ubuntu3.23

In general, a standard system update will make all the necessary changes.

References

• CVE-2023-23915
• CVE-2023-23914
• CVE-2023-23916