USN-6429-1: curl vulnerabilities

Releases

• Ubuntu 23.04
• Ubuntu 22.04 LTS
• Ubuntu 20.04 LTS

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)

Update instructions

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

Ubuntu 23.04

• 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

Ubuntu 22.04

• 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

Ubuntu 20.04

• 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

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

References

• CVE-2023-38546
• CVE-2023-38545

Related notices

• USN-6429-2: libcurl3-gnutls, libcurl4, libcurl4-nss-dev, libcurl4-gnutls-dev, libcurl4-openssl-dev, curl, libcurl3, libcurl3-nss, libcurl4-doc
• USN-6429-3: libcurl3-gnutls, libcurl4, libcurl4-nss-dev, libcurl4-gnutls-dev, libcurl4-openssl-dev, curl, libcurl3-nss, libcurl4-doc