A curl security update has been released for Ubuntu Linux 20.04 LTS, 22.04 LTS, and 23.04.

[USN-6429-1] curl vulnerabilities

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Ubuntu Security Notice USN-6429-1
October 11, 2023

curl vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 23.04
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS

Summary:

Several security issues were fixed in curl.

Software Description:
- 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 LTS:
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 LTS:
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:
https://ubuntu.com/security/notices/USN-6429-1
CVE-2023-38545, CVE-2023-38546

Package Information:
https://launchpad.net/ubuntu/+source/curl/7.88.1-8ubuntu2.3
https://launchpad.net/ubuntu/+source/curl/7.81.0-1ubuntu1.14
https://launchpad.net/ubuntu/+source/curl/7.68.0-1ubuntu2.20