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CVE-2012-1015

The kdc_handle_protected_negotiation function in the Key Distribution Center (KDC) in MIT...

9.3 HighFix available

CVE-2012-1015 is a high vulnerability (CVSS 9.3) in Mit Kerberos 5, published July 31, 2012. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 4.81%, the 91st percentile. Fixed in krb5 1.10.1+dfsg-2.

The kdc_handle_protected_negotiation function in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) 1.8.x, 1.9.x before 1.9.5, and 1.10.x before 1.10.3 attempts to calculate a checksum before verifying that the key type is appropriate for a checksum, which allows remote attackers to execute arbitrary code or cause a denial of service (uninitialized pointer free, heap memory corruption, and daemon crash) via a crafted AS-REQ request.

Exploit likelihood

4.81%Up 0.5 points since Feb 4, 2022
90%50%10%1%

What each source reports

NVD Score used 9.3

The kdc_handle_protected_negotiation function in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) 1.8.x, 1.9.x before 1.9.5, and 1.10.x before 1.10.3 attempts to calculate a checksum before verifying that the key type is appropriate for a checksum, which allows remote attackers to execute arbitrary code or cause a denial of service (uninitialized pointer free, heap memory corruption, and daemon crash) via a crafted AS-REQ request.

Record
CVE-2012-1015
CVSS 2.0
9.3 HighAV:N/AC:M/Au:N/C:C/I:C/A:C
Weakness
CWE-20
Updated
2026-11-02
CVE List No score

The kdc_handle_protected_negotiation function in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) 1.8.x, 1.9.x before 1.9.5, and 1.10.x before 1.10.3 attempts to calculate a checksum before verifying that the key type is appropriate for a checksum, which allows remote attackers to execute arbitrary code or cause a denial of service (uninitialized pointer free, heap memory corruption, and daemon crash) via a crafted AS-REQ request.

Record
CVE-2012-1015
Updated
2026-11-02
EUVDEUVD-2012-1053 No score

The kdc_handle_protected_negotiation function in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) 1.8.x, 1.9.x before 1.9.5, and 1.10.x before 1.10.3 attempts to calculate a checksum before verifying that the key type is appropriate for a checksum, which allows remote attackers to execute arbitrary code or cause a denial of service (uninitialized pointer free, heap memory corruption, and daemon crash) via a crafted AS-REQ request.

Record
EUVD-2012-1053
Updated
2026-11-03
GitHub AdvisoriesGHSA-phxm-4gpx-94fr No score

The kdc_handle_protected_negotiation function in the Key Distribution Center (KDC) in MIT...

The kdc_handle_protected_negotiation function in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) 1.8.x, 1.9.x before 1.9.5, and 1.10.x before 1.10.3 attempts to calculate a checksum before verifying that the key type is appropriate for a checksum, which allows remote attackers to execute arbitrary code or cause a denial of service (uninitialized pointer free, heap memory corruption, and daemon crash) via a crafted AS-REQ request.

Record
GHSA-phxm-4gpx-94fr
Weakness
CWE-20
Updated
2026-11-02
OSV No score

The kdc_handle_protected_negotiation function in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) 1.8.x, 1.9.x before 1.9.5, and 1.10.x before 1.10.3 attempts to calculate a checksum before verifying that the key type is appropriate for a checksum, which allows remote attackers to execute arbitrary code or cause a denial of service (uninitialized pointer free, heap memory corruption, and daemon crash) via a crafted AS-REQ request.

Record
CVE-2012-1015
Updated
2026-11-02
OSVDEBIAN-CVE-2012-1015 No score

The kdc_handle_protected_negotiation function in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) 1.8.x, 1.9.x before 1.9.5, and 1.10.x before 1.10.3 attempts to calculate a checksum before verifying that the key type is appropriate for a checksum, which allows remote attackers to execute arbitrary code or cause a denial of service (uninitialized pointer free, heap memory corruption, and daemon crash) via a crafted AS-REQ request.

Record
DEBIAN-CVE-2012-1015
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
krb5
Debian:12
 before 1.10.1+dfsg-2
1.10.1+dfsg-2
krb5
Debian:13
 before 1.10.1+dfsg-2
1.10.1+dfsg-2
krb5
Debian:14
 before 1.10.1+dfsg-2
1.10.1+dfsg-2
krb5
Debian:6.0
 before 1.8.3+dfsg-4squeeze6, plus listed versions
1.8.3+dfsg-41.8.3+dfsg-4squeeze11.8.3+dfsg-4squeeze21.8.3+dfsg-4squeeze5
1.8.3+dfsg-4squeeze6
krb5
Red Hat:enterprise_linux:6::client
 before 0:1.9-33.el6_3.2
0:1.9-33.el6_3.2
krb5-debuginfo
Red Hat:enterprise_linux:6::client
 before 0:1.9-33.el6_3.2
0:1.9-33.el6_3.2
krb5-libs
Red Hat:enterprise_linux:6::client
 before 0:1.9-33.el6_3.2
0:1.9-33.el6_3.2
krb5-pkinit-openssl
Red Hat:enterprise_linux:6::client
 before 0:1.9-33.el6_3.2
0:1.9-33.el6_3.2
krb5-workstation
Red Hat:enterprise_linux:6::client
 before 0:1.9-33.el6_3.2
0:1.9-33.el6_3.2
krb5-devel
Red Hat:enterprise_linux:6::client
 before 0:1.9-33.el6_3.2
0:1.9-33.el6_3.2
Show 26 moreShow less
Affected packages
PackageAffectedFixed
krb5-server
Red Hat:enterprise_linux:6::client
 before 0:1.9-33.el6_3.2
0:1.9-33.el6_3.2
krb5-server-ldap
Red Hat:enterprise_linux:6::client
 before 0:1.9-33.el6_3.2
0:1.9-33.el6_3.2
krb5
Red Hat:enterprise_linux:6::computenode
 before 0:1.9-33.el6_3.2
0:1.9-33.el6_3.2
krb5-debuginfo
Red Hat:enterprise_linux:6::computenode
 before 0:1.9-33.el6_3.2
0:1.9-33.el6_3.2
krb5-libs
Red Hat:enterprise_linux:6::computenode
 before 0:1.9-33.el6_3.2
0:1.9-33.el6_3.2
krb5-pkinit-openssl
Red Hat:enterprise_linux:6::computenode
 before 0:1.9-33.el6_3.2
0:1.9-33.el6_3.2
krb5-workstation
Red Hat:enterprise_linux:6::computenode
 before 0:1.9-33.el6_3.2
0:1.9-33.el6_3.2
krb5-devel
Red Hat:enterprise_linux:6::computenode
 before 0:1.9-33.el6_3.2
0:1.9-33.el6_3.2
krb5-server
Red Hat:enterprise_linux:6::computenode
 before 0:1.9-33.el6_3.2
0:1.9-33.el6_3.2
krb5-server-ldap
Red Hat:enterprise_linux:6::computenode
 before 0:1.9-33.el6_3.2
0:1.9-33.el6_3.2
krb5
Red Hat:enterprise_linux:6::server
 before 0:1.9-33.el6_3.2
0:1.9-33.el6_3.2
krb5-debuginfo
Red Hat:enterprise_linux:6::server
 before 0:1.9-33.el6_3.2
0:1.9-33.el6_3.2
krb5-devel
Red Hat:enterprise_linux:6::server
 before 0:1.9-33.el6_3.2
0:1.9-33.el6_3.2
krb5-libs
Red Hat:enterprise_linux:6::server
 before 0:1.9-33.el6_3.2
0:1.9-33.el6_3.2
krb5-pkinit-openssl
Red Hat:enterprise_linux:6::server
 before 0:1.9-33.el6_3.2
0:1.9-33.el6_3.2
krb5-server
Red Hat:enterprise_linux:6::server
 before 0:1.9-33.el6_3.2
0:1.9-33.el6_3.2
krb5-server-ldap
Red Hat:enterprise_linux:6::server
 before 0:1.9-33.el6_3.2
0:1.9-33.el6_3.2
krb5-workstation
Red Hat:enterprise_linux:6::server
 before 0:1.9-33.el6_3.2
0:1.9-33.el6_3.2
krb5
Red Hat:enterprise_linux:6::workstation
 before 0:1.9-33.el6_3.2
0:1.9-33.el6_3.2
krb5-debuginfo
Red Hat:enterprise_linux:6::workstation
 before 0:1.9-33.el6_3.2
0:1.9-33.el6_3.2
krb5-devel
Red Hat:enterprise_linux:6::workstation
 before 0:1.9-33.el6_3.2
0:1.9-33.el6_3.2
krb5-libs
Red Hat:enterprise_linux:6::workstation
 before 0:1.9-33.el6_3.2
0:1.9-33.el6_3.2
krb5-pkinit-openssl
Red Hat:enterprise_linux:6::workstation
 before 0:1.9-33.el6_3.2
0:1.9-33.el6_3.2
krb5-server
Red Hat:enterprise_linux:6::workstation
 before 0:1.9-33.el6_3.2
0:1.9-33.el6_3.2
krb5-server-ldap
Red Hat:enterprise_linux:6::workstation
 before 0:1.9-33.el6_3.2
0:1.9-33.el6_3.2
krb5-workstation
Red Hat:enterprise_linux:6::workstation
 before 0:1.9-33.el6_3.2
0:1.9-33.el6_3.2

History

History
WhenChangedSources
2026-11-03aliasesEUVD
2026-11-02createdCVE List, GitHub Advisories, NVD, OSV

References

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