What’s Vulnerable › Vulnerabilities

CVE-2024-43688

• Severity: high (CVSS 7.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-08-20 · updated 2026-06-17
• Weakness: CWE-787

Description

cron/entry.c in vixie cron before 9cc8ab1, as used in OpenBSD 7.4 and 7.5, allows a heap-based buffer underflow and memory corruption. NOTE: this issue was introduced during a May 2023 refactoring.

Affected products

• OpenBSD: 7.4, 7.5
• Vixie Cron: before 9cc8ab1 — fixed in 9cc8ab1

How to fix

Upgrade to a fixed version: Vixie Cron 9cc8ab1. Check the vendor advisory for mitigations.

References

• https://github.com/vixie/cron/commit/9cc8ab1087bb9ab861dd5595c41200683c9f6712
• https://www.supernetworks.org/CVE-2024-43688/openbsd-cron-heap-underflow.txt
• https://www.supernetworks.org/advisories/CVE-2024-43688-openbsd-cron-heap-underflow.txt

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