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CVE-2010-1321· NVD / CVE Program· CNA mitre

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.

Noroxi assessment

Priority: Monitor (action score 29/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 6.8% (FIRST EPSS); higher than 94% of all records.
  • No special conditions are required; it is repeatable.
  • Fixed version: heimdal (Debian:12) 1.4.0~git20100605.dfsg.1-1; krb5 (Debian:12) 1.8.1+dfsg-3; krb5 (Debian:5.0) 1.6.dfsg.4~beta1-5lenny4.

Low priority for now. Upgrade to heimdal (Debian:12) 1.4.0~git20100605.dfsg.1-1; krb5 (Debian:12) 1.8.1+dfsg-3; krb5 (Debian:5.0) 1.6.dfsg.4~beta1-5lenny4 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

MediumCVSS 6.8 · v2.0—No exploit Fix available
Published
May 19, 2010
Updated
Jun 16, 2026
EPSS
6.8% · 94th percentile

Report tools

JSON

Action score

29

Monitor

Low priority for now.

CVSS
27 / 40 · 6.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
2 / 30 · 6.8%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2010-1321

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
mitkerberos 5
debiandebian linux
canonicalubuntu linux
oracledatabase server
opensuseopensuse
suselinux enterprise server
fedoraprojectfedora

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • canonical ubuntu linux10.04
  • canonical ubuntu linux6.06
  • canonical ubuntu linux8.04
  • canonical ubuntu linux9.04
  • canonical ubuntu linux9.10
  • debian debian linux5.0
  • debian debian linux6.0
  • fedoraproject fedora11
  • fedoraproject fedora12
  • fedoraproject fedora13
  • mit kerberos 5up to 1.7.1 inclusive
  • mit kerberos 51.8 and later · before 1.8.2
  • opensuse opensuse11.0
  • opensuse opensuse11.1
  • opensuse opensuse11.2
  • opensuse opensuse11.3
  • oracle database serverall versions
  • suse linux enterprise server10
  • suse linux enterprise server11

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12heimdalbefore 1.4.0~git20100605.dfsg.1-11.4.0~git20100605.dfsg.1-1
Debian:12krb5before 1.8.1+dfsg-31.8.1+dfsg-3
Debian:5.0krb5before 1.6.dfsg.4~beta1-5lenny41.6.dfsg.4~beta1-5lenny4
openSUSE:Tumbleweedkrb5before 1.15-1.11.15-1.1
Red Hat:enterprise_linux:3::askrb5before 0:1.2.7-720:1.2.7-72
Red Hat:enterprise_linux:3::askrb5-debuginfobefore 0:1.2.7-720:1.2.7-72
Red Hat:enterprise_linux:3::askrb5-develbefore 0:1.2.7-720:1.2.7-72
Red Hat:enterprise_linux:3::askrb5-libsbefore 0:1.2.7-720:1.2.7-72
Red Hat:enterprise_linux:3::askrb5-serverbefore 0:1.2.7-720:1.2.7-72
Red Hat:enterprise_linux:3::askrb5-workstationbefore 0:1.2.7-720:1.2.7-72
Red Hat:enterprise_linux:4::askrb5before 0:1.3.4-62.el4_8.20:1.3.4-62.el4_8.2
Red Hat:enterprise_linux:4::askrb5-debuginfobefore 0:1.3.4-62.el4_8.20:1.3.4-62.el4_8.2
Red Hat:enterprise_linux:4::askrb5-develbefore 0:1.3.4-62.el4_8.20:1.3.4-62.el4_8.2
Red Hat:enterprise_linux:4::askrb5-libsbefore 0:1.3.4-62.el4_8.20:1.3.4-62.el4_8.2
Red Hat:enterprise_linux:4::askrb5-serverbefore 0:1.3.4-62.el4_8.20:1.3.4-62.el4_8.2
Red Hat:enterprise_linux:4::askrb5-workstationbefore 0:1.3.4-62.el4_8.20:1.3.4-62.el4_8.2
Red Hat:enterprise_linux:5::clientkrb5-libsbefore 0:1.6.1-36.el5_5.40:1.6.1-36.el5_5.4
Red Hat:enterprise_linux:5::clientkrb5-workstationbefore 0:1.6.1-36.el5_5.40:1.6.1-36.el5_5.4
Red Hat:enterprise_linux:5::client_workstationkrb5before 0:1.6.1-36.el5_5.40:1.6.1-36.el5_5.4
Red Hat:enterprise_linux:5::client_workstationkrb5-debuginfobefore 0:1.6.1-36.el5_5.40:1.6.1-36.el5_5.4
Red Hat:enterprise_linux:5::client_workstationkrb5-develbefore 0:1.6.1-36.el5_5.40:1.6.1-36.el5_5.4
Red Hat:enterprise_linux:5::client_workstationkrb5-serverbefore 0:1.6.1-36.el5_5.40:1.6.1-36.el5_5.4
Red Hat:network_satellite:5.4::el5java-1.6.0-ibmbefore 1:1.6.0.9.1-1jpp.1.el51:1.6.0.9.1-1jpp.1.el5
Red Hat:network_satellite:5.4::el5java-1.6.0-ibm-develbefore 1:1.6.0.9.1-1jpp.1.el51:1.6.0.9.1-1jpp.1.el5

+82

Same product

mit: all records

Other highest-scoring records for the same primary product.

  • CVE-2007-0956The telnet daemon (telnetd) in MIT krb5 before 1.6.1 allows remote attackers to bypass authentication and gain system access via a username
    49Plan
  • CVE-2011-0285The process_chpw_request function in schpw.c in the password-changing functionality in kadmind in MIT Kerberos 5 (aka krb5) 1.7 through 1.9
    46Plan
  • CVE-2001-0247Buffer overflows in BSD-based FTP servers allows remote attackers to execute arbitrary commands via a long pattern string containing a {} se
    46Plan

Published before and after this one in the same product

  • ← EarlierCVE-2010-0629Apr 7, 2010 · Use-after-free vulnerability in kadmin/server/server_stubs.c in kadmind in MIT Kerberos 5 (aka krb5) 1.5 through 1.6.3 allows remote authent
    28Monitor
  • ← EarlierCVE-2010-1320Apr 22, 2010 · Double free vulnerability in do_tgs_req.c in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) 1.7.x and 1.8.x before 1.8.2 all
    20Monitor
  • Later →CVE-2010-1322Oct 7, 2010 · The merge_authdata function in kdc_authdata.c in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) 1.8.x before 1.8.4 does not
    27Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
debian:heimdal1.4.0~git20100605.dfsg.1-1 · Debian:12Package registry (OSV)
debian:krb51.8.1+dfsg-3 · Debian:12Package registry (OSV)
opensuse:krb51.15-1.1 · openSUSE:TumbleweedPackage registry (OSV)
red hat:java-1.6.0-sun1:1.6.0.22-1jpp.1.el4 · Red Hat:rhel_extras:4Package registry (OSV)
red hat:java-1.6.0-sun-demo1:1.6.0.22-1jpp.1.el4 · Red Hat:rhel_extras:4Package registry (OSV)
red hat:java-1.6.0-sun-devel1:1.6.0.22-1jpp.1.el4 · Red Hat:rhel_extras:4Package registry (OSV)
red hat:java-1.6.0-sun-jdbc1:1.6.0.22-1jpp.1.el4 · Red Hat:rhel_extras:4Package registry (OSV)
red hat:java-1.6.0-sun-plugin1:1.6.0.22-1jpp.1.el4 · Red Hat:rhel_extras:4Package registry (OSV)
red hat:java-1.6.0-sun-src1:1.6.0.22-1jpp.1.el4 · Red Hat:rhel_extras:4Package registry (OSV)
red hat:krb50:1.2.7-72 · Red Hat:enterprise_linux:3::asPackage registry (OSV)
red hat:krb5-debuginfo0:1.2.7-72 · Red Hat:enterprise_linux:3::asPackage registry (OSV)
red hat:krb5-devel0:1.2.7-72 · Red Hat:enterprise_linux:3::asPackage registry (OSV)
red hat:krb5-libs0:1.2.7-72 · Red Hat:enterprise_linux:3::asPackage registry (OSV)
red hat:krb5-server0:1.2.7-72 · Red Hat:enterprise_linux:3::asPackage registry (OSV)
red hat:krb5-workstation0:1.2.7-72 · Red Hat:enterprise_linux:3::asPackage registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
C · the service can be disrupted
Attack complexity
Low
Confidentiality impact
None
Integrity impact
None
Availability impact
C

Weakness class (CWE)

CWE-476 · NULL Pointer Dereference

CVSS vector

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

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (19 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records