How severe is CVE-2007-4743?

CVE-2007-4743 has a CVSS 2.0 base score of 10.0, rated critical severity.

Is CVE-2007-4743 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2007-4743?

CVE-2007-4743 primarily affects Mit Kerberos 5. In total, 12 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2007-4743?

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

When was CVE-2007-4743 published?

CVE-2007-4743 was published on 2007-09-06 and last updated on 2026-06-16.

CVE-2007-4743

CVE-2007-4743 is a critical-severity vulnerability in Mit Kerberos 5 with a CVSS 2.0 base score of 10.0. 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-119.

Key facts

Severity: Critical (CVSS 2.0 base score 10.0)
EPSS exploit prediction: 5% (91st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Mit Kerberos 5
Published: 2007-09-06
Last modified: 2026-06-16

Description

The original patch for CVE-2007-3999 in svc_auth_gss.c in the RPCSEC_GSS RPC library in MIT Kerberos 5 (krb5) 1.4 through 1.6.2, as used by the Kerberos administration daemon (kadmind) and other applications that use krb5, does not correctly check the buffer length in some environments and architectures, which might allow remote attackers to conduct a buffer overflow attack.

Frequently asked questions

What is CVE-2007-4743?: The original patch for CVE-2007-3999 in svc_auth_gss.c in the RPCSEC_GSS RPC library in MIT Kerberos 5 (krb5) 1.4 through 1.6.2, as used by the Kerberos administration daemon (kadmind) and other applications that use krb5, does not correctly check the buffer length in some environments and architectures, which might allow remote attackers to conduct a buffer overflow attack.
How severe is CVE-2007-4743?: CVE-2007-4743 has a CVSS 2.0 base score of 10.0, rated critical severity.
Is CVE-2007-4743 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2007-4743?: CVE-2007-4743 primarily affects Mit Kerberos 5. In total, 12 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2007-4743?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2007-4743 published?: CVE-2007-4743 was published on 2007-09-06 and last updated on 2026-06-16.

References

Affected products (12)

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_5:1.4.4:*:*:*:*:*:*:*
cpe:2.3:a:mit:kerberos_5:1.5:*:*:*:*:*:*:*
cpe:2.3:a:mit:kerberos_5:1.5.1:*:*:*:*:*:*:*
cpe:2.3:a:mit:kerberos_5:1.5.2:*:*:*:*:*:*:*
cpe:2.3:a:mit:kerberos_5:1.5.3:*:*:*:*:*:*:*
cpe:2.3:a:mit:kerberos_5:1.6:*:*:*:*:*:*:*
cpe:2.3:a:mit:kerberos_5:1.6.1:*:*:*:*:*:*:*
cpe:2.3:a:mit:kerberos_5:1.6.2:*:*:*:*:*:*:*

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