Vulnerability Description
The Linux kernel NFSD implementation prior to versions 5.19.17 and 6.0.2 are vulnerable to buffer overflow. NFSD tracks the number of pages held by each NFSD thread by combining the receive and send buffers of a remote procedure call (RPC) into a single array of pages. A client can force the send buffer to shrink by sending an RPC message over TCP with garbage data added at the end of the message. The RPC message with garbage data is still correctly formed according to the specification and is passed forward to handlers. Vulnerable code in NFSD is not expecting the oversized request and writes beyond the allocated buffer space. CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | < 5.19.17 |
| Netapp | Active Iq Unified Manager | - |
| Netapp | H300S Firmware | - |
| Netapp | H300S | - |
| Netapp | H500S Firmware | - |
| Netapp | H500S | - |
| Netapp | H700S Firmware | - |
| Netapp | H700S | - |
| Netapp | H410S Firmware | - |
| Netapp | H410S | - |
| Netapp | H410C Firmware | - |
| Netapp | H410C | - |
Related Weaknesses (CWE)
References
- http://packetstormsecurity.com/files/171289/Kernel-Live-Patch-Security-Notice-LN
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f9Mailing ListPatchVendor Advisory
- https://security.netapp.com/advisory/ntap-20221215-0006/Third Party Advisory
- http://packetstormsecurity.com/files/171289/Kernel-Live-Patch-Security-Notice-LN
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f9Mailing ListPatchVendor Advisory
- https://security.netapp.com/advisory/ntap-20221215-0006/Third Party Advisory
- https://cert-portal.siemens.com/productcert/html/ssa-265688.html
FAQ
What is CVE-2022-43945?
CVE-2022-43945 is a vulnerability with a CVSS score of 7.5 (HIGH). The Linux kernel NFSD implementation prior to versions 5.19.17 and 6.0.2 are vulnerable to buffer overflow. NFSD tracks the number of pages held by each NFSD thread by combining the receive and send b...
How severe is CVE-2022-43945?
CVE-2022-43945 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2022-43945?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel, Netapp Active Iq Unified Manager, Netapp H300S Firmware, Netapp H300S, Netapp H500S Firmware.