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Ubuntu Security Notice USN-6363-1
Ubuntu Security Notice 6363-1 - It was discovered that curl incorrectly handled certain large headers. A remote attacker could possibly use this issue to cause curl to consume resources, resulting in a denial of service.
==========================================================================Ubuntu Security Notice USN-6363-1September 13, 2023curl vulnerability==========================================================================A security issue affects these releases of Ubuntu and its derivatives:- Ubuntu 23.04Summary:curl could be made to consume resources if it received specially craftednetwork traffic.Software Description:- curl: HTTP, HTTPS, and FTP client and client librariesDetails:It was discovered that curl incorrectly handled certain large headers. Aremote attacker could possibly use this issue to cause curl to consumeresources, resulting in a denial of service.Update instructions:The problem can be corrected by updating your system to the followingpackage versions:Ubuntu 23.04: curl 7.88.1-8ubuntu2.2 libcurl3-gnutls 7.88.1-8ubuntu2.2 libcurl3-nss 7.88.1-8ubuntu2.2 libcurl4 7.88.1-8ubuntu2.2In general, a standard system update will make all the necessary changes.References: https://ubuntu.com/security/notices/USN-6363-1 CVE-2023-38039Package Information: https://launchpad.net/ubuntu/+source/curl/7.88.1-8ubuntu2.2Related news
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When curl retrieves an HTTP response, it stores the incoming headers so that they can be accessed later via the libcurl headers API. However, curl did not have a limit in how many or how large headers it would accept in a response, allowing a malicious server to stream an endless series of headers and eventually cause curl to run out of heap memory.