USN-5021-1: curl vulnerabilities

Releases

• Ubuntu 21.04
• Ubuntu 20.04 LTS
• Ubuntu 18.04 ESM

Packages

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

Details

Harry Sintonen and Tomas Hoger discovered that curl incorrectly handled
TELNET connections when the -t option was used on the command line.
Uninitialized data possibly containing sensitive information could be sent
to the remote server, contrary to expectations. (CVE-2021-22898,
CVE-2021-22925)

Harry Sintonen discovered that curl incorrectly reused connections in the
connection pool. This could result in curl reusing the wrong connections.
(CVE-2021-22924)

Update instructions

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

Ubuntu 21.04

• libcurl3-gnutls - 7.74.0-1ubuntu2.1
• libcurl3-nss - 7.74.0-1ubuntu2.1
• libcurl4 - 7.74.0-1ubuntu2.1
• curl - 7.74.0-1ubuntu2.1

Ubuntu 20.04

• libcurl3-gnutls - 7.68.0-1ubuntu2.6
• libcurl3-nss - 7.68.0-1ubuntu2.6
• libcurl4 - 7.68.0-1ubuntu2.6
• curl - 7.68.0-1ubuntu2.6

Ubuntu 18.04

• libcurl3-gnutls - 7.58.0-2ubuntu3.14
• libcurl3-nss - 7.58.0-2ubuntu3.14
• libcurl4 - 7.58.0-2ubuntu3.14
• curl - 7.58.0-2ubuntu3.14

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

References

• CVE-2021-22898
• CVE-2021-22925
• CVE-2021-22924

Related notices

• USN-5021-2: libcurl4-doc, libcurl4-nss-dev, libcurl3-gnutls, libcurl3, libcurl3-nss, libcurl4-openssl-dev, curl, libcurl4-gnutls-dev
• USN-5894-1: libcurl4-doc, libcurl4-nss-dev, libcurl3-gnutls, libcurl3, libcurl3-nss, libcurl4-openssl-dev, curl, libcurl4-gnutls-dev