Predictive Vulnerability Intelligence.

Product

  • Product
  • Pricing
  • Documentation

Company

  • About
  • Partnerships
  • Blog
  • Support

Legal

  • Terms
  • Privacy
  • Data Licensing

© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2009-0537

23
FAUCET Score

CVE-2009-0537 describes an integer overflow vulnerability in the fts_build function within libc, affecting OpenBSD 4.4 and earlier, and Microsoft Interix 6.0. This flaw allows a local attacker to trigger a denial of service (application crash) by providing a deeply nested directory structure to utilities like du or rm. With a CVSS score of 4.9 (AV:L/AC:L/Au:N/C:N/I:N/A:C), it indicates a low-complexity local attack leading to complete system availability loss. While an exploit is available on ExploitDB, there is no evidence of active exploitation, Metasploit modules, or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
6.0CPE matchmatch criteria
cpe:2.3:a:microsoft:interix:6.0:*:10.0.6030.0:*:*:*:*:*
<= 4.4CPE matchmatch criteria
cpe:2.3:o:openbsd:openbsd:*:*:*:*:*:*:*:*
2.0CPE matchmatch criteria
cpe:2.3:o:openbsd:openbsd:2.0:*:*:*:*:*:*:*
2.1CPE matchmatch criteria
cpe:2.3:o:openbsd:openbsd:2.1:*:*:*:*:*:*:*
2.2CPE matchmatch criteria
cpe:2.3:o:openbsd:openbsd:2.2:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

4.9MEDIUM

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

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Exploitability Score
3.9
Impact Score
6.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
3.59%
Probability of exploitation in next 30 days
EPSS Percentile
88.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
ExploitDB: EDB-8163 · Mar 5, 2009
This CVE's current EPSS score of 0.0359 is in the 98th percentile among its peer group of 3,049 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

securityreason.com / achievement_securityalert/60
exploit-db.com / exploits/8163
openbsd.org / cgi-bin/cvsweb/src/lib/libc/gen/fts.c
Vendor Advisory
openbsd.org / cgi-bin/cvsweb/src/lib/libc/gen/fts.c.diff
securityfocus.com / archive/1/501505/100/0/threaded
securityfocus.com / bid/34008
Exploit
securitytracker.com / id