CVE-2009-0537 EXPLOIT
4.9
MEDIUM · CVSS 2.0 · EPSS 3.6% (pctl 89)
Patch early
A public exploit exists.
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.
Scoring
| CVSS | 4.9 (MEDIUM, v2.0) |
|---|---|
| Vector | AV:L/AC:L/Au:N/C:N/I:N/A:C |
| EPSS | 3.59% — more likely to be exploited than 89% of all CVEs |
| Weakness | CWE-189 |
| On CISA KEV | no |
| Public exploit | yes |
| Published | 2009-03-09 |
| Last modified | 2026-06-16 |
Affected (2)
| Vendor | Product |
|---|---|
| microsoft | interix |
| openbsd | openbsd |
Public exploits
| Source | Title | Date |
|---|---|---|
| exploit-db | Libc - 'libc:fts_*()' Local Denial of Service | 2009-03-05 |
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
- http://www.securitytracker.com/id?1021818
- https://www.exploit-db.com/exploits/8163
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