krb5: KDC daemon crash via free() of an uninitialized pointer
Published Aug 6, 2012
9.3
HIGHCVSS 2.0
EPSS 4.81%
Description
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.
Affected products
No data.
Configuration 1
- 1.8
- 1.8.1
- 1.8.2
- 1.8.3
- 1.8.4
- 1.8.5
- 1.8.6
Configuration 2
- 1.9.4
Configuration 3
- 1.10
- 1.10.1
- 1.10.2
No data.
Red Hat Enterprise Linux 6
krb5-0:1.9-33.el6_3.2
Fixed · RHSA-2012:1131
Red Hat Enterprise Linux 5
krb5
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 6 | krb5-0:1.9-33.el6_3.2 | Fixed | RHSA-2012:1131 |
| Red Hat Enterprise Linux 5 | krb5 | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
Not vulnerable. This issue did not affect the versions of krb5 as shipped with Red Hat Enterprise Linux 5.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:N/AC:M/Au:N/C:C/I:C/A:C
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (12 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 4.81% (0.04814) | 91.69th | v5 (v2026.06.15) |
| Jun 15, 2026 | 4.81% (0.04814) | 90.80th | v5 (v2026.06.15) |
| Nov 9, 2025 | 1.23% (0.01234) | 78.55th | v4 (v2025.03.14) |
| Mar 30, 2025 | 3.10% (0.03103) | 85.62th | v4 (v2025.03.14) |
| Mar 29, 2025 | 8.09% (0.08086) | 86.65th | v4 (v2025.03.14) |
| Mar 17, 2025 | 3.10% (0.03103) | 85.91th | v4 (v2025.03.14) |
| Dec 12, 2024 | 13.36% (0.13357) | 95.80th | v3 (v2023.03.01) |
| Mar 6, 2024 | 13.36% (0.13357) | 95.42th | v3 (v2023.03.01) |
| Mar 7, 2023 | 11.81% (0.11806) | 94.37th | v3 (v2023.03.01) |
| Mar 6, 2023 | 4.29% (0.04291) | 87.64th | v2 (v2022.01.01) |
| Apr 1, 2022 | 4.29% (0.04291) | 86.39th | v2 (v2022.01.01) |
| Feb 4, 2022 | 4.29% (0.04291) | 70.14th | v2 (v2022.01.01) |
References (9)
- http://lists.opensuse.org/opensuse-updates/2012-08/msg00016.html vendor-advisoryx_refsource_SUSE
- http://rhn.redhat.com/errata/RHSA-2012-1131.html vendor-advisoryx_refsource_REDHAT
- http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2012-001.txt x_refsource_CONFIRMPatchVendor Advisory
- http://www.debian.org/security/2012/dsa-2518 vendor-advisoryx_refsource_DEBIAN
- http://www.mandriva.com/security/advisories?name=MDVSA-2012:120 vendor-advisoryx_refsource_MANDRIVA
- https://access.redhat.com/security/cve/CVE-2012-1015 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=838012 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2012-1015
- https://www.cve.org/CVERecord?id=CVE-2012-1015
| Link | Providers | Tags |
|---|---|---|
| http://lists.opensuse.org/opensuse-updates/2012-08/msg00016.html | vendor-advisoryx_refsource_SUSE | |
| http://rhn.redhat.com/errata/RHSA-2012-1131.html | vendor-advisoryx_refsource_REDHAT | |
| http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2012-001.txt | x_refsource_CONFIRMPatchVendor Advisory | |
| http://www.debian.org/security/2012/dsa-2518 | vendor-advisoryx_refsource_DEBIAN | |
| http://www.mandriva.com/security/advisories?name=MDVSA-2012:120 | vendor-advisoryx_refsource_MANDRIVA | |
| https://access.redhat.com/security/cve/CVE-2012-1015 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=838012 | Issue Tracking | |
| https://nvd.nist.gov/vuln/detail/CVE-2012-1015 | ||
| https://www.cve.org/CVERecord?id=CVE-2012-1015 |
Change history (0)
No recorded changes yet.