Vulnerability record · CVE-2009-0537 · published 9 March 2009

CVE-2009-0537: Microsoft interix vulnerability

Microsoft · Interix

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.

4.9 CVSS 2.0 Medium EPSS 3.6% · top 11.0% CWE-189 · CWE-189

4.9CVSS 2.0 base score

3.6%EPSS exploitation probability, 30 days

NoNot in CISA KEV

2Affected product versions listed by NVD

14References, 2 tagged exploit

16 Jun 2026Last modified by NVD

Description

AV:L/AC:L/Au:N/C:N/I:N/A:C

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

Interix Microsoft

Openbsd Openbsd

References

Link	Tags
http://securityreason.com/achievement_securityalert/60
http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gen/fts.c	Vendor Advisory
http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gen/fts.c.diff?r1=1.41%3Br2=1.42%3Bf=h
http://www.securityfocus.com/archive/1/501505/100/0/threaded
http://www.securityfocus.com/bid/34008	Exploit
http://www.securitytracker.com/id?1021818
https://www.exploit-db.com/exploits/8163
http://securityreason.com/achievement_securityalert/60
http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gen/fts.c	Vendor Advisory
http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gen/fts.c.diff?r1=1.41%3Br2=1.42%3Bf=h
http://www.securityfocus.com/archive/1/501505/100/0/threaded
http://www.securityfocus.com/bid/34008	Exploit
http://www.securitytracker.com/id?1021818
https://www.exploit-db.com/exploits/8163

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2009-0537), CISA KEV, FIRST EPSS (scores of 2026-09-30). This page is refreshed as NVD updates the record.