Vulnerability Monitor

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CVE-2007-5939

The gss_userok function in appl/ftp/ftpd/gss_userok.c in Heimdal 0.7.2 does not allocate memory for the ticketfile pointer before calling free, which allows remote attackers to have an unknown impact via an invalid username. NOTE: the vulnerability was originally reported for ftpd.c, but this is incorrect.

Security Impact Summary

CVE-2007-5939 is a security vulnerability that . Impacting 1 product from heimdal organizations running these solutions should prioritize assessment and patching.

Historical Context

Originally identified in 2007, this vulnerability predates many modern security frameworks and practices. The vulnerability landscape of that era was characterized by different threat models and less mature defense mechanisms compared to contemporary standards.

Published

2007-12-06T15:46:00.000

Last Modified

2026-04-23T00:35:47.467

Status

Modified

Source

[email protected]

Severity

CVSSv2: 10.0 (HIGH)

CVSSv2 Vector

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

Access Vector: NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: COMPLETE
Integrity Impact: COMPLETE
Availability Impact: COMPLETE

Exploitability Score

10.0

Impact Score

10.0

Weaknesses

Type: Primary
CWE-119

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	heimdal	heimdal	0.7.2	Yes

References

http://bugs.gentoo.org/show_bug.cgi?id=199207 ([email protected])
http://marc.info/?l=full-disclosure&m=119704362903699&w=2 ([email protected])
http://osvdb.org/44750 ([email protected])
http://securitytracker.com/id?1019057 ([email protected])
http://www.mandriva.com/security/advisories?name=MDKSA-2007:239 ([email protected])
http://www.securityfocus.com/bid/26758 ([email protected])
http://bugs.gentoo.org/show_bug.cgi?id=199207 (af854a3a-2127-422b-91ae-364da2661108)
http://marc.info/?l=full-disclosure&m=119704362903699&w=2 (af854a3a-2127-422b-91ae-364da2661108)
http://osvdb.org/44750 (af854a3a-2127-422b-91ae-364da2661108)
http://securitytracker.com/id?1019057 (af854a3a-2127-422b-91ae-364da2661108)
http://www.mandriva.com/security/advisories?name=MDKSA-2007:239 (af854a3a-2127-422b-91ae-364da2661108)
http://www.securityfocus.com/bid/26758 (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For heimdal's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.