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

ubuntu
Calendar Grey September 29, 2025
Scroller Ubuntu
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

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 ha...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory DoS Ubuntu curl cookie issue regression

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
Low
Medium
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Critical

Ubuntu Security Notice USN-5495-2

Topics%20covered

Topics Covered

security advisory DoS Ubuntu curl cookie issue regression

Package Information

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

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