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USN-5964-1: curl vulnerabilities

20 March 2023

Several security issues were fixed in curl.

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Releases

Packages

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

Details

Harry Sintonen discovered that curl incorrectly handled certain TELNET
connection options. Due to lack of proper input scrubbing, curl could pass
on user name and telnet options to the server as provided, contrary to
expectations. (CVE-2023-27533)

Harry Sintonen discovered that curl incorrectly handled special tilde
characters when used with SFTP paths. A remote attacker could possibly use
this issue to circumvent filtering. (CVE-2023-27534)

Harry Sintonen discovered that curl incorrectly reused certain FTP
connections. This could lead to the wrong credentials being reused,
contrary to expectations. (CVE-2023-27535)

Harry Sintonen discovered that curl incorrectly reused connections when the
GSS delegation option had been changed. This could lead to the option being
reused, contrary to expectations. (CVE-2023-27536)

Harry Sintonen discovered that curl incorrectly reused certain SSH
connections. This could lead to the wrong credentials being reused,
contrary to expectations. (CVE-2023-27538)

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.

Learn more about Ubuntu Pro

Update instructions

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

Ubuntu 22.10
Ubuntu 22.04
Ubuntu 20.04
Ubuntu 18.04

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

References

Related notices

  • USN-5964-2: libcurl4-doc, libcurl3, libcurl3-gnutls, libcurl4-nss-dev, libcurl3-nss, curl, libcurl4-openssl-dev, libcurl4-gnutls-dev

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Further reading