Security: This update includes fixes for CVE-2025-47905 aka VSV00016: A client- side desync vulnerability can be triggered in Varnish Cache. This vulnerability can be triggered under specific circumstances involving malformed HTTP/1 chunked requests.. -------------------------------------------------------------------------------- Fedora Update Notification FEDORA-2025-f7e5d2e40f 2025-08-09 03:07:08.046900+00:00 -------------------------------------------------------------------------------- Name : varnish Product : Fedora 41 Version : 7.5.0 Release : 4.fc41 URL : https://vinyl-cache.org/ Summary : High-performance HTTP accelerator Description : This is Varnish Cache, a high-performance HTTP accelerator. Varnish Cache stores web pages in memory so web servers don\u2019t have to create the same web page over and over again. Varnish Cache serves pages much faster than any application server; giving the website a significant speed up. Documentation wiki and additional information about Varnish Cache is available on: https://vinyl-cache.org/ -------------------------------------------------------------------------------- Update Information: Security: This update includes fixes for CVE-2025-47905 aka VSV00016: A client- side desync vulnerability can be triggered in Varnish Cache. This vulnerability can be triggered under specific circumstances involving malformed HTTP/1 chunked requests. -------------------------------------------------------------------------------- ChangeLog: * Thu Jul 31 2025 Ingvar Hagelund - 7.5.0-4 - Security: Added patch for VSV00016 AKA CVE-2025-47905 -------------------------------------------------------------------------------- References: [ 1 ] Bug #2369404 - CVE-2025-47905 varnish: request smuggling attacks [fedora-all] https://bugzilla.redhat.com/show_bug.cgi?id=2369404 -------------------------------------------------------------------------------- This update can be installed with the "dnf" update program. Use su -c 'dnf upgrade--advisory FEDORA-2025-f7e5d2e40f' at the command line. For more information, refer to the dnf documentation available at http://dnf.readthedocs.io/en/latest/command_ref.html#upgrade-command-label All packages are signed with the Fedora Project GPG key. More details on the GPG keys used by the Fedora Project can be found at https://fedoraproject.org/keys -------------------------------------------------------------------------------- . Patch release for Varnish Cache fixes server-side timing issue in Fedora 41, boosting overall security measures.. Varnish Cache,Fedora 41,security update,client-side risk,HTTP vulnerability. . Severity: Critical. LinuxSecurity.com Team
A client-side desync vulnerability can be triggered in Varnish, a high-performance web accelerator. An attacker can abuse a flaw in Varnishâs handling of chunked transfer encoding which allows certain malformed HTTP/1 requests to exploit improper framing of the message body to smuggle additional . ------------------------------------------------------------------------- Debian LTS Advisory DLA-4187-1
A HTTP/1 client-side desync vulnerability has been fixed in Varnish, a caching HTTP reverse proxy. For Debian 11 bullseye, this problem has been fixed in version . - ------------------------------------------------------------------------- Debian LTS Advisory DLA-4101-1
The Twisted Web HTTP 1.1 server, located in the twisted.web.http module, parsed several HTTP request constructs more leniently than permitted by RFC 7230. This non-conformant parsing can lead to desync if requests pass through multiple HTTP parsers, potentially resulting in HTTP request smuggling. . ------------------------------------------------------------------------- Debian LTS Advisory DLA-2991-1
Get the latest Linux and open source security news straight to your inbox.