Allocation of Resources Without Limits or Throttling Affecting bpftool package, versions <0:4.18.0-425.13.1.el8_7


Severity

Recommended
0.0
high
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.13% (49th percentile)

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  • Snyk IDSNYK-RHEL8-BPFTOOL-4344223
  • published11 Nov 2022
  • disclosed3 Oct 2022

Introduced: 3 Oct 2022

CVE-2022-43945  (opens in a new tab)
CWE-770  (opens in a new tab)

How to fix?

Upgrade RHEL:8 bpftool to version 0:4.18.0-425.13.1.el8_7 or higher.
This issue was patched in RHSA-2023:0832.

NVD Description

Note: Versions mentioned in the description apply only to the upstream bpftool package and not the bpftool package as distributed by RHEL. See How to fix? for RHEL:8 relevant fixed versions and status.

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 Scores

version 3.1