CVE-2009-0537

Severity: medium (CVSS 4.9 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 3.6% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2009-03-09 · updated 2026-06-16
Weakness: CWE-189

Description

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.

Affected products

Microsoft Interix: 6.0
OpenBSD: through 4.4; 2.0, 2.1, 2.2, 2.3, 2.4, 2.5 (+18)

References

http://securityreason.com/achievement_securityalert/60
http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gen/fts.c
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
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
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

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