Ubuntu 22.04 LTS: USN-5891-1 Critical: curl HSTS Issues

ubuntu

February 27, 2023

Several security issues were fixed in curl.

Summary

Several security issues were fixed in curl.

Software Description:

- curl: HTTP, HTTPS, and FTP client and client libraries

Details:

Harry Sintonen discovered that curl incorrectly handled HSTS support

when multiple URLs are requested serially. 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-2023-23914)

Harry Sintonen discovered that curl incorrectly handled HSTS support

when multiple URLs are requested in parallel. 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-2023-23915)

Patrick Monnerat discovered that curl incorrectly handled memory when

processing requests with multi-header compression. A remote attacker could

possibly use this issue to cause curl to consume resources, leading to a

denial of service. (CVE-2023-23916)

Topics Covered

security advisory denial of service critical remote attack ubuntu curl HSTS

Update Instructions

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

Ubuntu 22.10:
   curl                            7.85.0-1ubuntu0.3
   libcurl3-gnutls                 7.85.0-1ubuntu0.3
   libcurl3-nss                    7.85.0-1ubuntu0.3
   libcurl4                        7.85.0-1ubuntu0.3

Ubuntu 22.04 LTS:
   curl                            7.81.0-1ubuntu1.8
   libcurl3-gnutls                 7.81.0-1ubuntu1.8
   libcurl3-nss                    7.81.0-1ubuntu1.8
   libcurl4                        7.81.0-1ubuntu1.8

Ubuntu 20.04 LTS:
   curl                            7.68.0-1ubuntu2.16
   libcurl3-gnutls                 7.68.0-1ubuntu2.16
   libcurl3-nss                    7.68.0-1ubuntu2.16
   libcurl4                        7.68.0-1ubuntu2.16

Ubuntu 18.04 LTS:
   curl                            7.58.0-2ubuntu3.23
   libcurl3-gnutls                 7.58.0-2ubuntu3.23
   libcurl3-nss                    7.58.0-2ubuntu3.23
   libcurl4                        7.58.0-2ubuntu3.23

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