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CVE-2023-52434

8.1 · HIGH

In the Linux kernel, the following vulnerability has been resolved: smb: client: fix potential OOBs in smb2_parse_contexts() Validate offsets and lengths before dereferencing create contexts in s…

Published Feb 20, 2024CWE-119EPSS 1.02%

Overview

CVE-2023-52434 is a high-severity vulnerability. It was published on February 20, 2024 and has a CVSS 3.1 base score of 8.1 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.1, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

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

smb: client: fix potential OOBs in smb2_parse_contexts()

Validate offsets and lengths before dereferencing create contexts in

smb2_parse_contexts().

This fixes following oops when accessing invalid create contexts from

server:

BUG: unable to handle page fault for address: ffff8881178d8cc3

#PF: supervisor read access in kernel mode

#PF: error_code(0x0000) - not-present page

PGD 4a01067 P4D 4a01067 PUD 0

Oops: 0000 [#1] PREEMPT SMP NOPTI

CPU: 3 PID: 1736 Comm: mount.cifs Not tainted 6.7.0-rc4 #1

Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS

rel-1.16.2-3-gd478f380-rebuilt.opensuse.org 04/01/2014

RIP: 0010:smb2_parse_contexts+0xa0/0x3a0 [cifs]

Code: f8 10 75 13 48 b8 93 ad 25 50 9c b4 11 e7 49 39 06 0f 84 d2 00

00 00 8b 45 00 85 c0 74 61 41 29 c5 48 01 c5 41 83 fd 0f 76 55 <0f> b7

7d 04 0f b7 45 06 4c 8d 74 3d 00 66 83 f8 04 75 bc ba 04 00

RSP: 0018:ffffc900007939e0 EFLAGS: 00010216

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/13fb0fc4917621f3dfa285a27eaf7151d770b5e5Refgit.kernel.org/stable/c/17a0f64cc02d4972e21c733d9f21d1c512963afaRefgit.kernel.org/stable/c/1ae3c59355dc9882e09c020afe8ffbd895ad0f29Refgit.kernel.org/stable/c/6726429c18c62dbf5e96ebbd522f262e016553fbRefgit.kernel.org/stable/c/890bc4fac3c0973a49cac35f634579bebba7fe48Refgit.kernel.org/stable/c/af1689a9b7701d9907dfc84d2a4b57c4bc907144Refgit.kernel.org/stable/c/13fb0fc4917621f3dfa285a27eaf7151d770b5e5Refgit.kernel.org/stable/c/17a0f64cc02d4972e21c733d9f21d1c512963afaRefgit.kernel.org/stable/c/1ae3c59355dc9882e09c020afe8ffbd895ad0f29Refgit.kernel.org/stable/c/6726429c18c62dbf5e96ebbd522f262e016553fb

How CyberStrike helps

Frequently asked questions

What is CVE-2023-52434?

CVE-2023-52434 is a high-severity vulnerability. It was published on February 20, 2024 and has a CVSS 3.1 base score of 8.1 (HIGH).

How severe is CVE-2023-52434?

This vulnerability has a CVSS 3.1 base score of 8.1, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2023-52434?

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-2023-52434?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2023-52434 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.

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