USN-5412-1: curl vulnerabilities

Releases

• Ubuntu 22.04 LTS
• Ubuntu 21.10
• Ubuntu 20.04 LTS
• Ubuntu 18.04 ESM

Packages

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

Details

Axel Chong discovered that curl incorrectly handled percent-encoded URL
separators. A remote attacker could possibly use this issue to trick curl
into using the wrong URL and bypass certain checks or filters. This issue
only affected Ubuntu 22.04 LTS. (CVE-2022-27780)

Florian Kohnhuser discovered that curl incorrectly handled returning a
TLS server's certificate chain details. A remote attacker could possibly
use this issue to cause curl to stop responding, resulting in a denial of
service. (CVE-2022-27781)

Harry Sintonen discovered that curl incorrectly reused a previous
connection when certain options had been changed, contrary to expectations.
(CVE-2022-27782)

Update instructions

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

Ubuntu 22.04

• libcurl3-gnutls - 7.81.0-1ubuntu1.2
• libcurl3-nss - 7.81.0-1ubuntu1.2
• libcurl4 - 7.81.0-1ubuntu1.2
• curl - 7.81.0-1ubuntu1.2

Ubuntu 21.10

• libcurl3-gnutls - 7.74.0-1.3ubuntu2.2
• libcurl3-nss - 7.74.0-1.3ubuntu2.2
• libcurl4 - 7.74.0-1.3ubuntu2.2
• curl - 7.74.0-1.3ubuntu2.2

Ubuntu 20.04

• libcurl3-gnutls - 7.68.0-1ubuntu2.11
• libcurl3-nss - 7.68.0-1ubuntu2.11
• libcurl4 - 7.68.0-1ubuntu2.11
• curl - 7.68.0-1ubuntu2.11

Ubuntu 18.04

• libcurl3-gnutls - 7.58.0-2ubuntu3.18
• libcurl3-nss - 7.58.0-2ubuntu3.18
• libcurl4 - 7.58.0-2ubuntu3.18
• curl - 7.58.0-2ubuntu3.18

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

References

• CVE-2022-27780
• CVE-2022-27782
• CVE-2022-27781

Related notices

• USN-5499-1: libcurl3, libcurl3-nss, libcurl4-gnutls-dev, libcurl4-openssl-dev, libcurl4-doc, libcurl3-gnutls, curl, libcurl4-nss-dev