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Ubuntu Security Notice USN-6429-1

Ubuntu Security Notice 6429-1 - 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. 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.

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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

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