CVE-2023-50967Public exploitNetwork attack vector

CPU exhaustion via unbounded PBES2 iteration count

Published Mar 20, 2024 · Updated Nov 4, 2025

Denial of service in Latchset José 11 allows remote attackers to exhaust CPU resources via a JWE with an excessive PBES2 p2c value. The PBES2 unwrap path in lib/openssl/pbes2.c passes the header-controlled iteration count to PBKDF2 without enforcing an upper bound. Any application that decrypts attacker-supplied JWE data with a PBES2 algorithm can have its processing capacity consumed until the operation is stopped.

CVSS severity7.5
High
EPSS probability1.38%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Latchset José 11 allows remote attackers to exhaust CPU resources via a JWE with an excessive PBES2 p2c value. The PBES2 unwrap path in lib/openssl/pbes2.c passes the header-controlled iteration count to PBKDF2 without enforcing an upper bound. Any application that decrypts attacker-supplied JWE data with a PBES2 algorithm can have its processing capacity consumed until the operation is stopped.

The record

CVE
CVE-2023-50967
Published
Mar 20, 2024
Updated
Nov 4, 2025
Vendor
Latchset
Product
José
Classifications
CWE-400, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 20, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 4, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=11

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Latchset · Joséversion=11

Published CVSS scores

7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
T1499.004Application or System Exploitation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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