Ubuntu 23.04: USN-6237-1 Critical: Curl Certificate Spoofing Issues

ubuntu

July 19, 2023

Several security issues were fixed in curl.

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 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)

Topics Covered

security advisory critical remote attack local attack information disclosure ubuntu curl

Update Instructions

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

Ubuntu 23.04:
   curl                            7.88.1-8ubuntu2.1
   libcurl3-gnutls                 7.88.1-8ubuntu2.1
   libcurl3-nss                    7.88.1-8ubuntu2.1
   libcurl4                        7.88.1-8ubuntu2.1

Ubuntu 22.10:
   curl                            7.85.0-1ubuntu0.6
   libcurl3-gnutls                 7.85.0-1ubuntu0.6
   libcurl3-nss                    7.85.0-1ubuntu0.6
   libcurl4                        7.85.0-1ubuntu0.6

Ubuntu 22.04 LTS:
   curl                            7.81.0-1ubuntu1.11
   libcurl3-gnutls                 7.81.0-1ubuntu1.11
   libcurl3-nss                    7.81.0-1ubuntu1.11
   libcurl4                        7.81.0-1ubuntu1.11

Ubuntu 20.04 LTS:
   curl                            7.68.0-1ubuntu2.19
   libcurl3-gnutls                 7.68.0-1ubuntu2.19
   libcurl3-nss                    7.68.0-1ubuntu2.19
   libcurl4                        7.68.0-1ubuntu2.19

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