Ubuntu: 5021-1 High: Curl Connection Handling Risks and Updates

ubuntu

July 22, 2021

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:

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)

Topics Covered

security advisory Ubuntu update recommended multiple threats curl sensitive data connection handling

Update Instructions

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

Ubuntu 21.04:
  curl                            7.74.0-1ubuntu2.1
  libcurl3-gnutls                 7.74.0-1ubuntu2.1
  libcurl3-nss                    7.74.0-1ubuntu2.1
  libcurl4                        7.74.0-1ubuntu2.1

Ubuntu 20.04 LTS:
  curl                            7.68.0-1ubuntu2.6
  libcurl3-gnutls                 7.68.0-1ubuntu2.6
  libcurl3-nss                    7.68.0-1ubuntu2.6
  libcurl4                        7.68.0-1ubuntu2.6

Ubuntu 18.04 LTS:
  curl                            7.58.0-2ubuntu3.14
  libcurl3-gnutls                 7.58.0-2ubuntu3.14
  libcurl3-nss                    7.58.0-2ubuntu3.14
  libcurl4                        7.58.0-2ubuntu3.14

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