[USN-6237-3] curl vulnerabilities
Ubuntu Security Notice USN-6237-3
September 11, 2023
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 18.04 LTS (Available with Ubuntu Pro)
- Ubuntu 16.04 LTS (Available with Ubuntu Pro)
- Ubuntu 14.04 LTS (Available with Ubuntu Pro)
Several security issues were fixed in curl.
- curl: HTTP, HTTPS, and FTP client and client libraries
USN-6237-1 fixed several vulnerabilities in curl. This update provides the
corresponding updates for Ubuntu 14.04 LTS, Ubuntu 16.04 LTS, and
Ubuntu 18.04 LTS.
Original advisory details:
Hiroki Kurosawa discovered that curl incorrectly handled validating
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)
The problem can be corrected by updating your system to the following
Ubuntu 18.04 LTS (Available with Ubuntu Pro):
Ubuntu 16.04 LTS (Available with Ubuntu Pro):
Ubuntu 14.04 LTS (Available with Ubuntu Pro):
In general, a standard system update will make all the necessary changes.
A curl security update has been released for Ubuntu Linux 14.04 LTS, 16.04 LTS, and 18.04 LTS.