Go to homepageCyberStrike

Menu

Star on GitHub · 3.2k
Sign inDownload

CVE-2021-47458

7.1 · HIGH

In the Linux kernel, the following vulnerability has been resolved: ocfs2: mount fails with buffer overflow in strlen Starting with kernel 5.11 built with CONFIG_FORTIFY_SOURCE mouting an ocfs2 f…

Published May 22, 2024CWE-787EPSS 0.25%

Overview

CVE-2021-47458 is a high-severity vulnerability. It was published on May 22, 2024 and has a CVSS 3.1 base score of 7.1 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.1, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

ocfs2: mount fails with buffer overflow in strlen

Starting with kernel 5.11 built with CONFIG_FORTIFY_SOURCE mouting an

ocfs2 filesystem with either o2cb or pcmk cluster stack fails with the

trace below. Problem seems to be that strings for cluster stack and

cluster name are not guaranteed to be null terminated in the disk

representation, while strlcpy assumes that the source string is always

null terminated. This causes a read outside of the source string

triggering the buffer overflow detection.

detected buffer overflow in strlen

------------[ cut here ]------------

kernel BUG at lib/string.c:1149!

invalid opcode: 0000 [#1] SMP PTI

CPU: 1 PID: 910 Comm: mount.ocfs2 Not tainted 5.14.0-1-amd64 #1

Debian 5.14.6-2

RIP: 0010:fortify_panic+0xf/0x11

...

Call Trace:

ocfs2_initialize_super.isra.0.cold+0xc/0x18 [ocfs2]

ocfs2_fill_super+0x359/0x19b0 [ocfs2]

mount_bdev+0x185/0x1b0

legacy_get_

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/0e677ea5b7396f715a76b6b0ef441430e4c4b57fRefgit.kernel.org/stable/c/232ed9752510de4436468b653d145565669c8498Refgit.kernel.org/stable/c/4b74ddcc22ee6455946e80a9c4808801f8f8561eRefgit.kernel.org/stable/c/7623b1035ca2d17bde0f6a086ad6844a34648df1Refgit.kernel.org/stable/c/93be0eeea14cf39235e585c8f56df3b3859deaadRefgit.kernel.org/stable/c/ac011cb3ff7a76b3e0e6e77158ee4ba2f929e1fbRefgit.kernel.org/stable/c/b15fa9224e6e1239414525d8d556d824701849fcRefgit.kernel.org/stable/c/d3a83576378b4c904f711598dde2c5e881c4295cRefgit.kernel.org/stable/c/0e677ea5b7396f715a76b6b0ef441430e4c4b57fRefgit.kernel.org/stable/c/232ed9752510de4436468b653d145565669c8498

How CyberStrike helps

Frequently asked questions

What is CVE-2021-47458?

CVE-2021-47458 is a high-severity vulnerability. It was published on May 22, 2024 and has a CVSS 3.1 base score of 7.1 (HIGH).

How severe is CVE-2021-47458?

This vulnerability has a CVSS 3.1 base score of 7.1, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2021-47458?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2021-47458?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-47458 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

Related HIGH CVEs from 2021

View all
Browse by year2026202520242023202220212020201920182017201620152014201320122011201020092008200720062005200420032002200120001999