CVE-2009-0537

Exp

Integer overflow in the fts_build function in fts.c in libc in (1) OpenBSD 4.4 and earlier and (2) Microsoft Interix 6.0 build 10.0.6030.0 allows context-dependent attackers to cause a denial of service (application crash) via a deep directory tree, related to the fts_level structure member, as demonstrated by (a) du, (b) rm, (c) chmod, and (d) chgrp on OpenBSD; and (e) SearchIndexer.exe on Vista Enterprise.

Published: 2009-03-09 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2009-0537 is rated High Exploit Risk (61/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 3.59%). 2 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2009-0537

EDB-ID Source Kind Published Link
8163 exploit_db edb 2009-03-05 Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2009-0537

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 7.95% 3.59% -4.36%
2 2026-04-29 7.05% 7.95% +0.90%
3 2025-10-09 — 7.05% —

Full EPSS history (11 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2009-0537

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
4.9 2.0 MEDIUM
AV:L/AC:L/Au:N/C:N/I:N/A:C Click to expand
Access vector (AV:L)
Requires local access to the target system.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:C)
Complete availability impact.
 3.9 6.9 [email protected]

Weakness enumeration for CVE-2009-0537

OS Trackers for CVE-2009-0537

vendor priority summary link
debian unimportant CVE-2009-0537 unimportant priority: Debian including 1 source packages (glibc), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2009-0537
ubuntu low CVE-2009-0537 low priority: Ubuntu including 1 source packages (glibc), 5 status rows across 5 suites (dapper, gutsy, hardy, intrepid, upstream): not-affected 4, needs-triage 1. https://ubuntu.com/security/CVE-2009-0537

Affected software / configurations for CVE-2009-0537

Vendor Product Version Raw CPE
microsoft interix 6.0 cpe:2.3:a:microsoft:interix:6.0:*:10.0.6030.0:*:*:*:*:*
openbsd openbsd <= 4.4 cpe:2.3:o:openbsd:openbsd:*:*:*:*:*:*:*:*
openbsd openbsd 2.0 cpe:2.3:o:openbsd:openbsd:2.0:*:*:*:*:*:*:*
openbsd openbsd 2.1 cpe:2.3:o:openbsd:openbsd:2.1:*:*:*:*:*:*:*
openbsd openbsd 2.2 cpe:2.3:o:openbsd:openbsd:2.2:*:*:*:*:*:*:*
openbsd openbsd 2.3 cpe:2.3:o:openbsd:openbsd:2.3:*:*:*:*:*:*:*
openbsd openbsd 2.4 cpe:2.3:o:openbsd:openbsd:2.4:*:*:*:*:*:*:*
openbsd openbsd 2.5 cpe:2.3:o:openbsd:openbsd:2.5:*:*:*:*:*:*:*
openbsd openbsd 2.6 cpe:2.3:o:openbsd:openbsd:2.6:*:*:*:*:*:*:*
openbsd openbsd 2.7 cpe:2.3:o:openbsd:openbsd:2.7:*:*:*:*:*:*:*
openbsd openbsd 2.8 cpe:2.3:o:openbsd:openbsd:2.8:*:*:*:*:*:*:*
openbsd openbsd 2.9 cpe:2.3:o:openbsd:openbsd:2.9:*:*:*:*:*:*:*
openbsd openbsd 3.0 cpe:2.3:o:openbsd:openbsd:3.0:*:*:*:*:*:*:*
openbsd openbsd 3.1 cpe:2.3:o:openbsd:openbsd:3.1:*:*:*:*:*:*:*
openbsd openbsd 3.2 cpe:2.3:o:openbsd:openbsd:3.2:*:*:*:*:*:*:*
openbsd openbsd 3.3 cpe:2.3:o:openbsd:openbsd:3.3:*:*:*:*:*:*:*
openbsd openbsd 3.4 cpe:2.3:o:openbsd:openbsd:3.4:*:*:*:*:*:*:*
openbsd openbsd 3.5 cpe:2.3:o:openbsd:openbsd:3.5:*:*:*:*:*:*:*
openbsd openbsd 3.6 cpe:2.3:o:openbsd:openbsd:3.6:*:*:*:*:*:*:*
openbsd openbsd 3.7 cpe:2.3:o:openbsd:openbsd:3.7:*:*:*:*:*:*:*
openbsd openbsd 3.8 cpe:2.3:o:openbsd:openbsd:3.8:*:*:*:*:*:*:*
openbsd openbsd 3.9 cpe:2.3:o:openbsd:openbsd:3.9:*:*:*:*:*:*:*
openbsd openbsd 4.0 cpe:2.3:o:openbsd:openbsd:4.0:*:*:*:*:*:*:*
openbsd openbsd 4.1 cpe:2.3:o:openbsd:openbsd:4.1:*:*:*:*:*:*:*
openbsd openbsd 4.2 cpe:2.3:o:openbsd:openbsd:4.2:*:*:*:*:*:*:*
openbsd openbsd 4.3 cpe:2.3:o:openbsd:openbsd:4.3:*:*:*:*:*:*:*

References for CVE-2009-0537

cvelogic Threat Intelligence