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Ubuntu Security Notice USN-5021-1

Ubuntu Security Notice USN-5021-1
Posted Jul 22, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 5021-1 - 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. Harry Sintonen discovered that curl incorrectly reused connections in the connection pool. This could result in curl reusing the wrong connections. Various other issues were also addressed.

tags | advisory, remote
systems | linux, ubuntu
advisories | CVE-2021-22898, CVE-2021-22924, CVE-2021-22925
SHA-256 | 7ac8b3d2c694f2858e4713261d1ae24b6f8a1aae63be74dbdc2984959e7d4c58

Ubuntu Security Notice USN-5021-1

Change Mirror Download
==========================================================================
Ubuntu Security Notice USN-5021-1
July 22, 2021

curl vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 21.04
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS

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)

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.

References:
https://ubuntu.com/security/notices/USN-5021-1
CVE-2021-22898, CVE-2021-22924, CVE-2021-22925

Package Information:
https://launchpad.net/ubuntu/+source/curl/7.74.0-1ubuntu2.1
https://launchpad.net/ubuntu/+source/curl/7.68.0-1ubuntu2.6
https://launchpad.net/ubuntu/+source/curl/7.58.0-2ubuntu3.14
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