CVE-2003-0693

CVE-2003-0693 is a critical-severity vulnerability in Openbsd Openssh with a CVSS 2.0 base score of 10.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Description

A "buffer management error" in buffer_append_space of buffer.c for OpenSSH before 3.7 may allow remote attackers to execute arbitrary code by causing an incorrect amount of memory to be freed and corrupting the heap, a different vulnerability than CVE-2003-0695.

Frequently asked questions

What is CVE-2003-0693?
A "buffer management error" in buffer_append_space of buffer.c for OpenSSH before 3.7 may allow remote attackers to execute arbitrary code by causing an incorrect amount of memory to be freed and corrupting the heap, a different vulnerability than CVE-2003-0695.
How severe is CVE-2003-0693?
CVE-2003-0693 has a CVSS 2.0 base score of 10.0, rated critical severity.
Is CVE-2003-0693 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 10% (95th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2003-0693?
CVE-2003-0693 affects Openbsd Openssh. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2003-0693?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2003-0693 published?
CVE-2003-0693 was published on 2003-09-22 and last updated on 2026-06-16.

References

Affected products (1)

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