Description
In the Linux kernel, the following vulnerability has been resolved: sunrpc: fix client side handling of tls alerts A security exploit was discovered in NFS over TLS in tls_alert_recv due to its assumption that there is valid data in the msghdr's iterator's kvec. Instead, this patch proposes the rework how control messages are setup and used by sock_recvmsg(). If no control message structure is setup, kTLS layer will read and process TLS data record types. As soon as it encounters a TLS control message, it would return an error. At that point, NFS can setup a kvec backed control buffer and read in the control message such as a TLS alert. Scott found that a msg iterator can advance the kvec pointer as a part of the copy process thus we need to revert the iterator before calling into the tls_alert_recv.
Product status
dea034b963c8901bdcc3d3880c04f0d75c95112f before a55b3d15331859d9fdd261cfa6d34ca2aeb0fb95
dea034b963c8901bdcc3d3880c04f0d75c95112f before c36b2fbd60e8f9c6f975522130998608880c93be
dea034b963c8901bdcc3d3880c04f0d75c95112f before 3ee397eaaca4fa04db21bb98c8f1d0c6cc525368
dea034b963c8901bdcc3d3880c04f0d75c95112f before 3feada5baf4dc96e151ff2ca54630e1d274e5458
dea034b963c8901bdcc3d3880c04f0d75c95112f before cc5d59081fa26506d02de2127ab822f40d88bc5a
6.5
Any version before 6.5
6.6.102
6.12.42
6.15.10
6.16.1
6.17
References
git.kernel.org/...c/a55b3d15331859d9fdd261cfa6d34ca2aeb0fb95
git.kernel.org/...c/c36b2fbd60e8f9c6f975522130998608880c93be
git.kernel.org/...c/3ee397eaaca4fa04db21bb98c8f1d0c6cc525368
git.kernel.org/...c/3feada5baf4dc96e151ff2ca54630e1d274e5458
git.kernel.org/...c/cc5d59081fa26506d02de2127ab822f40d88bc5a
