CVE-2006-3084

CVE-2006-3084 is a high-severity vulnerability in Heimdal with a CVSS 2.0 base score of 7.2. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-264.

Key facts

• Severity: High (CVSS 2.0 base score 7.2)
• EPSS exploit prediction: 1% (39th percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-264
• Affected product: Heimdal
• Published: 2006-08-09
• Last modified: 2026-06-16

Description

The (1) ftpd and (2) ksu programs in (a) MIT Kerberos 5 (krb5) up to 1.5, and 1.4.x before 1.4.4, and (b) Heimdal 0.7.2 and earlier, do not check return codes for setuid calls, which might allow local users to gain privileges by causing setuid to fail to drop privileges. NOTE: as of 20060808, it is not known whether an exploitable attack scenario exists for these issues.

Frequently asked questions

What is CVE-2006-3084?

The (1) ftpd and (2) ksu programs in (a) MIT Kerberos 5 (krb5) up to 1.5, and 1.4.x before 1.4.4, and (b) Heimdal 0.7.2 and earlier, do not check return codes for setuid calls, which might allow local users to gain privileges by causing setuid to fail to drop privileges. NOTE: as of 20060808, it is not known whether an exploitable attack scenario exists for these issues.

How severe is CVE-2006-3084?

CVE-2006-3084 has a CVSS 2.0 base score of 7.2, rated high severity.

Is CVE-2006-3084 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (39th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2006-3084?

CVE-2006-3084 primarily affects Heimdal. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2006-3084?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2006-3084 published?

CVE-2006-3084 was published on 2006-08-09 and last updated on 2026-06-16.

References

• ftp://ftp.pdc.kth.se/pub/heimdal/src/heimdal-0.7.2-setuid-patch.txt
• http://fedoranews.org/cms/node/2376
• http://secunia.com/advisories/21402
• http://secunia.com/advisories/21436
• http://secunia.com/advisories/21439
• http://secunia.com/advisories/21461
• http://secunia.com/advisories/21467
• http://secunia.com/advisories/21527
• http://secunia.com/advisories/21613
• http://secunia.com/advisories/23707
• http://security.gentoo.org/glsa/glsa-200608-21.xml
• http://securitytracker.com/id?1016664
• http://web.mit.edu/Kerberos/advisories/MITKRB5-SA-2006-001-setuid.txt
• http://www.debian.org/security/2006/dsa-1146
• http://www.gentoo.org/security/en/glsa/glsa-200608-15.xml
• http://www.kb.cert.org/vuls/id/401660
• http://www.novell.com/linux/security/advisories/2006_20_sr.html
• http://www.osvdb.org/27871
• http://www.osvdb.org/27872
• http://www.pdc.kth.se/heimdal/advisory/2006-08-08/
• http://www.securityfocus.com/archive/1/442599/100/0/threaded
• http://www.securityfocus.com/archive/1/443498/100/100/threaded
• http://www.securityfocus.com/bid/19427
• http://www.ubuntu.com/usn/usn-334-1
• http://www.vupen.com/english/advisories/2006/3225

Affected products (6)

• cpe:2.3:a:heimdal:heimdal:*:*:*:*:*:*:*:*
• cpe:2.3:a:mit:kerberos_5:1.4:*:*:*:*:*:*:*
• cpe:2.3:a:mit:kerberos_5:1.4.1:*:*:*:*:*:*:*
• cpe:2.3:a:mit:kerberos_5:1.4.2:*:*:*:*:*:*:*
• cpe:2.3:a:mit:kerberos_5:1.4.3:*:*:*:*:*:*:*
• cpe:2.3:a:mit:kerberos_5:1.5:*:*:*:*:*:*:*

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