1. Ubuntu Security Notices
  2. USN-6429-1

USN-6429-1: curl vulnerabilities

Publication date

11 October 2023

Overview

Several security issues were fixed in curl.

Releases

Packages

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

Details

Jay Satiro discovered that curl incorrectly handled hostnames when using a
SOCKS5 proxy. In environments where curl is configured to use a SOCKS5
proxy, a remote attacker could possibly use this issue to execute arbitrary
code. This issue only affected Ubuntu 22.04 LTS, and Ubuntu 23.04.
(CVE-2023-38545)

It was discovered that curl incorrectly handled cookies when an application
duplicated certain handles. A local attacker could possibly create a cookie
file and inject arbitrary cookies into subsequent connections.
(CVE-2023-38546)

Jay Satiro discovered that curl incorrectly handled hostnames when using a
SOCKS5 proxy. In environments where curl is configured to use a SOCKS5
proxy, a remote attacker could possibly use this issue to execute arbitrary
code. This issue only affected Ubuntu 22.04 LTS, and Ubuntu 23.04.
(CVE-2023-38545)

It was discovered that curl incorrectly handled cookies when an application
duplicated certain handles. A local attacker could possibly create a cookie
file and inject arbitrary cookies into subsequent connections.
(CVE-2023-38546)

Update instructions

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

Learn more about how to get the fixes.

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

Ubuntu Release Package Version
23.04 lunar curl –  7.88.1-8ubuntu2.3
libcurl3-gnutls –  7.88.1-8ubuntu2.3
libcurl3-nss –  7.88.1-8ubuntu2.3
libcurl4 –  7.88.1-8ubuntu2.3
22.04 jammy curl –  7.81.0-1ubuntu1.14
libcurl3-gnutls –  7.81.0-1ubuntu1.14
libcurl3-nss –  7.81.0-1ubuntu1.14
libcurl4 –  7.81.0-1ubuntu1.14
20.04 focal curl –  7.68.0-1ubuntu2.20
libcurl3-gnutls –  7.68.0-1ubuntu2.20
libcurl3-nss –  7.68.0-1ubuntu2.20
libcurl4 –  7.68.0-1ubuntu2.20

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Get Ubuntu Pro

References

Have additional questions?

Talk to a member of the team ›