CVE-2022-43945

kernel: nfsd buffer overflow by RPC message over TCP with garbage data

Published Nov 4, 2022 CVSS 3.1 · 7.5 High EPSS 5.5% KEV · Not listed
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

Remediation

No solution or workaround provided in the CVE record

Tracking

Sign in to view the affected projects.

Advisories

Source ID Title
Debian DSA Debian DSA DSA-5730-1 linux security update
EUVD EUVD EUVD-2022-46915 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
Ubuntu USN Ubuntu USN USN-5754-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-5754-2 Linux kernel (Azure) vulnerabilities
Ubuntu USN Ubuntu USN USN-5755-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-5755-2 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-5773-1 Linux kernel (OEM) vulnerabilities
Ubuntu USN Ubuntu USN USN-5779-1 Linux kernel (Azure) vulnerabilities
Ubuntu USN Ubuntu USN USN-5789-1 Linux kernel (OEM) vulnerabilities
Ubuntu USN Ubuntu USN USN-5794-1 Linux kernel (AWS) vulnerabilities
Ubuntu USN Ubuntu USN USN-5802-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-5804-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-5804-2 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-5808-1 Linux kernel (IBM) vulnerabilities
Ubuntu USN Ubuntu USN USN-5813-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-5829-1 Linux kernel (Raspberry Pi) vulnerabilities
Ubuntu USN Ubuntu USN USN-5830-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-5861-1 Linux kernel (Dell300x) vulnerabilities
Ubuntu USN Ubuntu USN USN-5863-1 Linux kernel (Azure) vulnerabilities
Ubuntu USN Ubuntu USN USN-5875-1 Linux kernel (GKE) vulnerabilities
Ubuntu USN Ubuntu USN USN-5914-1 Linux kernel (OEM) vulnerabilities
Ubuntu USN Ubuntu USN USN-5918-1 Linux kernel (BlueField) vulnerabilities
History
Type Values Removed Values Added
Metrics epss

{'score': 0.00633}

epss

{'score': 0.00467}

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}