Ubuntu 22.04 LTS USN-5412-1 Critical: Curl Denial Of Service

ubuntu

May 11, 2022

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:

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)

Topics Covered

security advisory denial of service security issue Ubuntu remote execution curl

Update Instructions

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

Ubuntu 22.04 LTS:
  curl                            7.81.0-1ubuntu1.2
  libcurl3-gnutls                 7.81.0-1ubuntu1.2
  libcurl3-nss                    7.81.0-1ubuntu1.2
  libcurl4                        7.81.0-1ubuntu1.2

Ubuntu 21.10:
  curl                            7.74.0-1.3ubuntu2.2
  libcurl3-gnutls                 7.74.0-1.3ubuntu2.2
  libcurl3-nss                    7.74.0-1.3ubuntu2.2
  libcurl4                        7.74.0-1.3ubuntu2.2

Ubuntu 20.04 LTS:
  curl                            7.68.0-1ubuntu2.11
  libcurl3-gnutls                 7.68.0-1ubuntu2.11
  libcurl3-nss                    7.68.0-1ubuntu2.11
  libcurl4                        7.68.0-1ubuntu2.11

Ubuntu 18.04 LTS:
  curl                            7.58.0-2ubuntu3.18
  libcurl3-gnutls                 7.58.0-2ubuntu3.18
  libcurl3-nss                    7.58.0-2ubuntu3.18
  libcurl4                        7.58.0-2ubuntu3.18

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