Squid is an open source caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. Due to a Collapse of Data into Unsafe Value bug ,Squid may be vulnerable to a Denial of Service attack against HTTP header parsing. This problem allows a remote client or a remote server to perform Denial of Service when sending oversized headers in HTTP messages. In versions of Squid prior to 6.5 this can be achieved if the request_header_max_size or reply_header_max_size settings are unchanged from the default. In Squid version 6.5 and later, the default setting of these parameters is safe. Squid will emit a critical warning in cache.log if the administrator is setting these parameters to unsafe values. Squid will not at this time prevent these settings from being changed to unsafe values. Users are advised to upgrade to version 6.5. There are no known workarounds for this vulnerability. This issue is also tracked as SQUID-2024:2. References: https://github.com/squid-cache/squid/security/advisories/GHSA-h5x6-w8mv-xfpr https://megamansec.github.io/Squid-Security-Audit/response-memleaks.html Upstream patch: https://github.com/squid-cache/squid/commit/72a3bbd5e431597c3fdb56d752bc56b010ba3817
Created squid tracking bugs for this issue: Affects: fedora-all [bug 2264310]
The fix https://github.com/squid-cache/squid/commit/72a3bbd5e431597c3fdb56d752bc56b010ba3817 appears in all upstream releases that are currently built in Fedora.
This issue has been addressed in the following products: Red Hat Enterprise Linux 8.8 Extended Update Support Via RHSA-2024:1062 https://access.redhat.com/errata/RHSA-2024:1062
This issue has been addressed in the following products: Red Hat Enterprise Linux 8.6 Extended Update Support Via RHSA-2024:1066 https://access.redhat.com/errata/RHSA-2024:1066
This issue has been addressed in the following products: Red Hat Enterprise Linux 9.2 Extended Update Support Via RHSA-2024:1184 https://access.redhat.com/errata/RHSA-2024:1184
This issue has been addressed in the following products: Red Hat Enterprise Linux 9 Via RHSA-2024:1376 https://access.redhat.com/errata/RHSA-2024:1376
This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2024:1375 https://access.redhat.com/errata/RHSA-2024:1375
This issue has been addressed in the following products: Red Hat Enterprise Linux 7 Via RHSA-2024:1787 https://access.redhat.com/errata/RHSA-2024:1787
This issue has been addressed in the following products: Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions Red Hat Enterprise Linux 8.4 Telecommunications Update Service Via RHSA-2024:1832 https://access.redhat.com/errata/RHSA-2024:1832
This issue has been addressed in the following products: Red Hat Enterprise Linux 9.0 Extended Update Support Via RHSA-2024:1833 https://access.redhat.com/errata/RHSA-2024:1833
This issue has been addressed in the following products: Red Hat Enterprise Linux 8.2 Advanced Update Support Red Hat Enterprise Linux 8.2 Update Services for SAP Solutions Red Hat Enterprise Linux 8.2 Telecommunications Update Service Via RHSA-2024:2777 https://access.redhat.com/errata/RHSA-2024:2777