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USN-4898-1: curl vulnerabilities

31 March 2021

curl could be made to expose sensitive information over the network.

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Releases

Packages

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

Details

Viktor Szakats discovered that curl did not strip off user credentials
from referrer header fields. A remote attacker could possibly use this
issue to obtain sensitive information. (CVE-2021-22876)

Mingtao Yang discovered that curl incorrectly handled session tickets when
using an HTTPS proxy. A remote attacker in control of an HTTPS proxy could
use this issue to bypass certificate checks and intercept communications.
This issue only affected Ubuntu 20.04 LTS and Ubuntu 20.10.
(CVE-2021-22890)

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 20.10
Ubuntu 20.04
Ubuntu 18.04
Ubuntu 16.04

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

Related notices

  • USN-4903-1: curl-udeb, libcurl4-openssl-dev, libcurl3-nss, curl, libcurl4-gnutls-dev, libcurl3-gnutls, libcurl3-udeb, libcurl4-nss-dev, libcurl3, libcurl4-doc