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Ubuntu Security Notice USN-5891-1

Ubuntu Security Notice 5891-1 - Harry Sintonen discovered that curl incorrectly handled HSTS support when multiple URLs are requested serially. A remote attacker could possibly use this issue to cause curl to use unencrypted connections. This issue only affected Ubuntu 22.04 LTS, and Ubuntu 22.10. Harry Sintonen discovered that curl incorrectly handled HSTS support when multiple URLs are requested in parallel. A remote attacker could possibly use this issue to cause curl to use unencrypted connections. This issue only affected Ubuntu 22.04 LTS, and Ubuntu 22.10.

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#vulnerability#ubuntu#dos#ssl

==========================================================================
Ubuntu Security Notice USN-5891-1
February 27, 2023

curl vulnerabilities

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

  • Ubuntu 22.10
  • Ubuntu 22.04 LTS
  • 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 discovered that curl incorrectly handled HSTS support
when multiple URLs are requested serially. A remote attacker could possibly
use this issue to cause curl to use unencrypted connections. This issue
only affected Ubuntu 22.04 LTS, and Ubuntu 22.10. (CVE-2023-23914)

Harry Sintonen discovered that curl incorrectly handled HSTS support
when multiple URLs are requested in parallel. A remote attacker could
possibly use this issue to cause curl to use unencrypted connections. This
issue only affected Ubuntu 22.04 LTS, and Ubuntu 22.10. (CVE-2023-23915)

Patrick Monnerat discovered that curl incorrectly handled memory when
processing requests with multi-header compression. A remote attacker could
possibly use this issue to cause curl to consume resources, leading to a
denial of service. (CVE-2023-23916)

Update instructions:

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

Ubuntu 22.10:
curl 7.85.0-1ubuntu0.3
libcurl3-gnutls 7.85.0-1ubuntu0.3
libcurl3-nss 7.85.0-1ubuntu0.3
libcurl4 7.85.0-1ubuntu0.3

Ubuntu 22.04 LTS:
curl 7.81.0-1ubuntu1.8
libcurl3-gnutls 7.81.0-1ubuntu1.8
libcurl3-nss 7.81.0-1ubuntu1.8
libcurl4 7.81.0-1ubuntu1.8

Ubuntu 20.04 LTS:
curl 7.68.0-1ubuntu2.16
libcurl3-gnutls 7.68.0-1ubuntu2.16
libcurl3-nss 7.68.0-1ubuntu2.16
libcurl4 7.68.0-1ubuntu2.16

Ubuntu 18.04 LTS:
curl 7.58.0-2ubuntu3.23
libcurl3-gnutls 7.58.0-2ubuntu3.23
libcurl3-nss 7.58.0-2ubuntu3.23
libcurl4 7.58.0-2ubuntu3.23

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

References:
https://ubuntu.com/security/notices/USN-5891-1
CVE-2023-23914, CVE-2023-23915, CVE-2023-23916

Package Information:
https://launchpad.net/ubuntu/+source/curl/7.85.0-1ubuntu0.3
https://launchpad.net/ubuntu/+source/curl/7.81.0-1ubuntu1.8
https://launchpad.net/ubuntu/+source/curl/7.68.0-1ubuntu2.16
https://launchpad.net/ubuntu/+source/curl/7.58.0-2ubuntu3.23

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A cleartext transmission of sensitive information vulnerability exists in curl <v7.88.0 that could cause HSTS functionality fail when multiple URLs are requested serially. Using its HSTS support, curl can be instructed to use HTTPS instead of usingan insecure clear-text HTTP step even when HTTP is provided in the URL. ThisHSTS mechanism would however surprisingly be ignored by subsequent transferswhen done on the same command line because the state would not be properlycarried on.

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