CVE-2023-52557

HIGH

Published Mar 1, 2024 Modified Oct 10, 2025 CWE-131 CWE-805

Description

In OpenBSD 7.3 before errata 016, npppd(8) could crash by a l2tp message which has an AVP (Attribute-Value Pair) with wrong length.

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CVSS v3.1 Score

7.5

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness Type (CWE)

CWE-131 CWE-131

CWE-805 CWE-805

Affected Products

Vendor	Product	Versions
openbsd	openbsd	< 7.3
openbsd	openbsd	All
openbsd	openbsd	All
openbsd	openbsd	All
openbsd	openbsd	All
openbsd	openbsd	All
openbsd	openbsd	All
openbsd	openbsd	All
openbsd	openbsd	All
openbsd	openbsd	All
openbsd	openbsd	All
openbsd	openbsd	All
openbsd	openbsd	All
openbsd	openbsd	All
openbsd	openbsd	All
openbsd	openbsd	All
openbsd	openbsd	All

References

Advisories & Patches

https://ftp.openbsd.org/pub/OpenBSD/patches/7.3/common/016_npppd.patch.sig https://github.com/openbsd/src/commit/abf3a29384c582c807a621e7fc6e7c68d0cafe9b https://ftp.openbsd.org/pub/OpenBSD/patches/7.3/common/016_npppd.patch.sig https://github.com/openbsd/src/commit/abf3a29384c582c807a621e7fc6e7c68d0cafe9b

Frequently Asked Questions

What is CVE-2023-52557? +

In OpenBSD 7.3 before errata 016, npppd(8) could crash by a l2tp message which has an AVP (Attribute-Value Pair) with wrong length. It has a CVSS v3.1 base score of 7.5 (HIGH).

How severe is CVE-2023-52557? +

CVE-2023-52557 has a CVSS v3.1 score of 7.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2023-52557? +

CVE-2023-52557 affects products from openbsd, specifically: openbsd. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2023-52557? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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