Ubuntu Security Notice 5788-1 - Hiroki Kurosawa discovered that curl incorrectly handled HSTS support when certain hostnames included IDN characters. 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. It was discovered that curl incorrectly handled denials when using HTTP proxies. A remote attacker could use this issue to cause curl to crash, resulting in a denial of service, or possibly execute arbitrary code.
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Ubuntu Security Notice USN-5788-1
January 05, 2023
curl vulnerabilities
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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:
Hiroki Kurosawa discovered that curl incorrectly handled HSTS support
when certain hostnames included IDN characters. 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-2022-43551)
It was discovered that curl incorrectly handled denials when using HTTP
proxies. A remote attacker could use this issue to cause curl to crash,
resulting in a denial of service, or possibly execute arbitrary code.
(CVE-2022-43552)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 22.10:
curl 7.85.0-1ubuntu0.2
libcurl3-gnutls 7.85.0-1ubuntu0.2
libcurl3-nss 7.85.0-1ubuntu0.2
libcurl4 7.85.0-1ubuntu0.2
Ubuntu 22.04 LTS:
curl 7.81.0-1ubuntu1.7
libcurl3-gnutls 7.81.0-1ubuntu1.7
libcurl3-nss 7.81.0-1ubuntu1.7
libcurl4 7.81.0-1ubuntu1.7
Ubuntu 20.04 LTS:
curl 7.68.0-1ubuntu2.15
libcurl3-gnutls 7.68.0-1ubuntu2.15
libcurl3-nss 7.68.0-1ubuntu2.15
libcurl4 7.68.0-1ubuntu2.15
Ubuntu 18.04 LTS:
curl 7.58.0-2ubuntu3.22
libcurl3-gnutls 7.58.0-2ubuntu3.22
libcurl3-nss 7.58.0-2ubuntu3.22
libcurl4 7.58.0-2ubuntu3.22
In general, a standard system update will make all the necessary changes.
References:
https://ubuntu.com/security/notices/USN-5788-1
CVE-2022-43551, CVE-2022-43552
Package Information:
https://launchpad.net/ubuntu/+source/curl/7.85.0-1ubuntu0.2
https://launchpad.net/ubuntu/+source/curl/7.81.0-1ubuntu1.7
https://launchpad.net/ubuntu/+source/curl/7.68.0-1ubuntu2.15
https://launchpad.net/ubuntu/+source/curl/7.58.0-2ubuntu3.22