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[USN-5495-2] curl regression

Posted on 29 September 2025
Ubuntu Security

==========================================================================Ubuntu Security Notice USN-5495-2
September 29, 2025

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

- Ubuntu 22.04 LTS

Summary:

USN-5495-1 introduced a regression in curl

Software Description:
- curl: HTTP, HTTPS, and FTP client and client libraries

Details:

USN-5495-1 fixed vulnerabilities in curl. The fix for CVE-2022-32205
miscalculated the maximum cookie size, causing a regression. This update
fixes the problem.

Original advisory details:

Harry Sintonen discovered that curl incorrectly handled certain cookies.
An attacker could possibly use this issue to cause a denial of service.
This issue only affected Ubuntu 21.10, and Ubuntu 22.04 LTS. (CVE-2022-32205)

Harry Sintonen discovered that curl incorrectly handled certain HTTP compressions.
An attacker could possibly use this issue to cause a denial of service.
(CVE-2022-32206)

Harry Sintonen incorrectly handled certain file permissions.
An attacker could possibly use this issue to expose sensitive information.
This issue only affected Ubuntu 21.10, and Ubuntu 22.04 LTS. (CVE-2022-32207)

Harry Sintonen discovered that curl incorrectly handled certain FTP-KRB messages.
An attacker could possibly use this to perform a machine-in-the-middle attack.
(CVE-2022-32208)

Update instructions:

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

Ubuntu 22.04 LTS
curl 7.81.0-1ubuntu1.21
libcurl3-gnutls 7.81.0-1ubuntu1.21
libcurl3-nss 7.81.0-1ubuntu1.21
libcurl4 7.81.0-1ubuntu1.21

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

References:
https://ubuntu.com/security/notices/USN-5495-2
https://ubuntu.com/security/notices/USN-5495-1
https://launchpad.net/bugs/2118865

Package Information:
https://launchpad.net/ubuntu/+source/curl/7.81.0-1ubuntu1.21

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