1. Ubuntu Security Notices
  2. USN-5788-1

USN-5788-1: curl vulnerabilities

Publication date

5 January 2023

Overview

Several security issues were fixed in curl.

Releases

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)

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

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
22.10 kinetic 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
22.04 jammy 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
20.04 focal 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
18.04 bionic 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

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 ›