CVE-2023-52557
OpenBSD 7.3 invalid l2tp message npppd crash
HIGH
7.5
CVSS Score
Published: March 1, 2024 at 04:14 PM UTC
Updated: June 17, 2026 at 06:43 AM UTC
1 product affected across 1 vendorOpenBSD
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Severity
HIGH7.5
Exploit prediction
EPSS 0.6%
SSVC
No known exploit
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.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
v < 7.37.3 ≤ v < 7.3 errata 0167.3 ≤ v < 7.3_errata_0167.37.3 errata_0017.3 errata_0027.3 errata_0037.3 errata_0047.3 errata_0057.3 errata_0067.3 errata_0077.3 errata_0087.3 errata_0097.3 errata_0107.3 errata_0117.3 errata_0127.3 errata_0137.3 errata_0147.3 errata_015
Affected range stops below 7.3 errata 016, so it looks safe — our inference, not a vendor statement
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
References (2)
Patch
Source: 9119a7d8-5eab-497f-8521-727c672e3725
https://ftp.openbsd.org/pub/OpenBSD/patches/7.3/common/016_npppd.patch.sigPatch
Source: 9119a7d8-5eab-497f-8521-727c672e3725
https://github.com/openbsd/src/commit/abf3a29384c582c807a621e7fc6e7c68d0cafe9bSSVC — Action Prioritization
SSVCNo known exploitAutomatablePartial impact
SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.
CVSS
7.5HIGHCISA-ADP
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- NONE
- Integrity
- NONE
- Availability
- HIGH
Vector?
Quick Info
StatusANALYZED
CWE
CWE-131CWE-805
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