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Ubuntu 22.04 LTS: curl Denial of Service Vulnerability Fix USN-5495-2

ubuntu
Calendar Grey September 29, 2025
Dist Ubuntu Esm H88
Ubuntu Security Notice USN-5495-2 resolves a curl regression affecting LTS releases, addressing denial of service issues.
USN-5495-1 introduced a regression in curl

Summary

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 Ubu...

Read the Full Advisory

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://bugs.launchpad.net/ubuntu/+source/curl/+bug/2118865

Severity
important
Lowest
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Critical

Ubuntu Security Notice USN-5495-2

Package Information

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

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