USN-5788-1: 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

Hiroki Kurosawa discovered that curl incorrectly handled HSTS support
when certain hostnames included IDN characters. 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-2022-43551)

It was discovered that curl incorrectly handled denials when using HTTP
proxies. A remote attacker could use this issue to cause curl to crash,
resulting in a denial of service, or possibly execute arbitrary code.
(CVE-2022-43552)

Update instructions

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

Ubuntu 22.10

• libcurl3-gnutls - 7.85.0-1ubuntu0.2
• libcurl3-nss - 7.85.0-1ubuntu0.2
• libcurl4 - 7.85.0-1ubuntu0.2
• curl - 7.85.0-1ubuntu0.2

Ubuntu 22.04

• libcurl3-gnutls - 7.81.0-1ubuntu1.7
• libcurl3-nss - 7.81.0-1ubuntu1.7
• libcurl4 - 7.81.0-1ubuntu1.7
• curl - 7.81.0-1ubuntu1.7

Ubuntu 20.04

• libcurl3-gnutls - 7.68.0-1ubuntu2.15
• libcurl3-nss - 7.68.0-1ubuntu2.15
• libcurl4 - 7.68.0-1ubuntu2.15
• curl - 7.68.0-1ubuntu2.15

Ubuntu 18.04

• libcurl3-gnutls - 7.58.0-2ubuntu3.22
• libcurl3-nss - 7.58.0-2ubuntu3.22
• libcurl4 - 7.58.0-2ubuntu3.22
• curl - 7.58.0-2ubuntu3.22

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

References

• CVE-2022-43551
• CVE-2022-43552

Related notices

• USN-5894-1: curl, libcurl3, libcurl4-nss-dev, libcurl4-doc, libcurl3-nss, libcurl3-gnutls, libcurl4-openssl-dev, libcurl4-gnutls-dev