USN-6237-1: curl vulnerabilities

Releases

• Ubuntu 23.04
• Ubuntu 22.10
• Ubuntu 22.04 LTS
• Ubuntu 20.04 LTS

Packages

• curl - HTTP, HTTPS, and FTP client and client libraries

Details

Hiroki Kurosawa discovered that curl incorrectly handled validating certain
certificate wildcards. A remote attacker could possibly use this issue to
spoof certain website certificates using IDN hosts. (CVE-2023-28321)

Hiroki Kurosawa discovered that curl incorrectly handled callbacks when
certain options are set by applications. This could cause applications
using curl to misbehave, resulting in information disclosure, or a denial
of service. (CVE-2023-28322)

It was discovered that curl incorrectly handled saving cookies to files. A
local attacker could possibly use this issue to create or overwrite files.
This issue only affected Ubuntu 22.10, and Ubuntu 23.04. (CVE-2023-32001)

Update instructions

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

Ubuntu 23.04

• libcurl3-gnutls - 7.88.1-8ubuntu2.1
• libcurl3-nss - 7.88.1-8ubuntu2.1
• libcurl4 - 7.88.1-8ubuntu2.1
• curl - 7.88.1-8ubuntu2.1

Ubuntu 22.10

• libcurl3-gnutls - 7.85.0-1ubuntu0.6
• libcurl3-nss - 7.85.0-1ubuntu0.6
• libcurl4 - 7.85.0-1ubuntu0.6
• curl - 7.85.0-1ubuntu0.6

Ubuntu 22.04

• libcurl3-gnutls - 7.81.0-1ubuntu1.11
• libcurl3-nss - 7.81.0-1ubuntu1.11
• libcurl4 - 7.81.0-1ubuntu1.11
• curl - 7.81.0-1ubuntu1.11

Ubuntu 20.04

• libcurl3-gnutls - 7.68.0-1ubuntu2.19
• libcurl3-nss - 7.68.0-1ubuntu2.19
• libcurl4 - 7.68.0-1ubuntu2.19
• curl - 7.68.0-1ubuntu2.19

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

References

• CVE-2023-28321
• CVE-2023-28322
• CVE-2023-32001

Related notices

• USN-6237-3: libcurl3, libcurl4, libcurl3-gnutls, libcurl4-nss-dev, libcurl4-doc, curl, libcurl4-gnutls-dev, libcurl4-openssl-dev, libcurl3-nss