How severe is CVE-2010-1321?

CVE-2010-1321 has a CVSS 2.0 base score of 6.8, rated medium severity.

Is CVE-2010-1321 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 7% (93rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2010-1321?

CVE-2010-1321 primarily affects Mit Kerberos 5. In total, 19 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2010-1321?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2010-1321 published?

CVE-2010-1321 was published on 2010-05-19 and last updated on 2026-06-16.

CVE-2010-1321

CVE-2010-1321 is a medium-severity vulnerability in Mit Kerberos 5 with a CVSS 2.0 base score of 6.8. 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-476.

Key facts

Severity: Medium (CVSS 2.0 base score 6.8)
EPSS exploit prediction: 7% (93rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-476
Affected product: Mit Kerberos 5
Published: 2010-05-19
Last modified: 2026-06-16

Description

The kg_accept_krb5 function in krb5/accept_sec_context.c in the GSS-API library in MIT Kerberos 5 (aka krb5) through 1.7.1 and 1.8 before 1.8.2, as used in kadmind and other applications, does not properly check for invalid GSS-API tokens, which allows remote authenticated users to cause a denial of service (NULL pointer dereference and daemon crash) via an AP-REQ message in which the authenticator's checksum field is missing.

Frequently asked questions

What is CVE-2010-1321?: The kg_accept_krb5 function in krb5/accept_sec_context.c in the GSS-API library in MIT Kerberos 5 (aka krb5) through 1.7.1 and 1.8 before 1.8.2, as used in kadmind and other applications, does not properly check for invalid GSS-API tokens, which allows remote authenticated users to cause a denial of service (NULL pointer dereference and daemon crash) via an AP-REQ message in which the authenticator's checksum field is missing.
How severe is CVE-2010-1321?: CVE-2010-1321 has a CVSS 2.0 base score of 6.8, rated medium severity.
Is CVE-2010-1321 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 7% (93rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2010-1321?: CVE-2010-1321 primarily affects Mit Kerberos 5. In total, 19 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2010-1321?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2010-1321 published?: CVE-2010-1321 was published on 2010-05-19 and last updated on 2026-06-16.

References

Affected products (19)

cpe:2.3:a:mit:kerberos_5:*:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:5.0:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:6.0:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:6.06:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:8.04:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:9.04:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:9.10:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:10.04:*:*:*:*:*:*:*
cpe:2.3:a:oracle:database_server:-:*:*:*:*:*:*:*
cpe:2.3:o:opensuse:opensuse:11.0:*:*:*:*:*:*:*
cpe:2.3:o:opensuse:opensuse:11.1:*:*:*:*:*:*:*
cpe:2.3:o:opensuse:opensuse:11.2:*:*:*:*:*:*:*
cpe:2.3:o:opensuse:opensuse:11.3:*:*:*:*:*:*:*
cpe:2.3:o:suse:linux_enterprise_server:10:sp3:*:*:-:*:*:*
cpe:2.3:o:suse:linux_enterprise_server:11:-:*:*:*:*:*:*
cpe:2.3:o:suse:linux_enterprise_server:11:sp1:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:11:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:12:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:13:*:*:*:*:*:*:*

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