sunrpc: fix client side handling of tls alerts
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 6.6.102, 6.12.42, 6.15.10, 6.16.1
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
- Exploitation: none
- Automatable: yes
- Technical impact: partial
Summary
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.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: yes · Technical impact: partial
- Record last updated
Affected versions
- Linux Linux
From dea034b963c8901bdcc3d3880c04f0d75c95112f · fixed in a55b3d15331859d9fdd261cfa6d34ca2aeb0fb95; From dea034b963c8901bdcc3d3880c04f0d75c95112f · fixed in c36b2fbd60e8f9c6f975522130998608880c93be; From dea034b963c8901bdcc3d3880c04f0d75c95112f · fixed in 3ee397eaaca4fa04db21bb98c8f1d0c6cc525368; From dea034b963c8901bdcc3d3880c04f0d75c95112f · fixed in 3feada5baf4dc96e151ff2ca54630e1d274e5458; From dea034b963c8901bdcc3d3880c04f0d75c95112f · fixed in cc5d59081fa26506d02de2127ab822f40d88bc5a
- Linux Linux
6.5
- KernelLinux
From 6.5.0 · fixed in 6.6.102; From 6.7.0 · fixed in 6.12.42; From 6.13.0 · fixed in 6.15.10; From 6.16.0 · fixed in 6.16.1