(krb5kdc): NULL pointer dereference in the TGS handling (MITKRB5-SA-2011-007)
Published Dec 8, 2011
6.8
MEDIUMCVSS 2.0
EPSS 2.38%
Description
The process_tgs_req function in do_tgs_req.c in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) 1.9 through 1.9.2 allows remote authenticated users to cause a denial of service (NULL pointer dereference and daemon crash) via a crafted TGS request that triggers an error other than the KRB5_KDB_NOENTRY error.
Affected products
No data.
- 5.1.9
- 5.1.9.1
- 5.1.9.2
No data.
Red Hat Enterprise Linux 6
krb5-0:1.9-22.el6_2.1
Fixed · RHSA-2011:1790
Red Hat Enterprise Linux 4
krb5
Not affected
Red Hat Enterprise Linux 5
krb5
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 6 | krb5-0:1.9-22.el6_2.1 | Fixed | RHSA-2011:1790 |
| Red Hat Enterprise Linux 4 | krb5 | Not affected | n/a |
| 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 4 and 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:L/Au:S/C:N/I:N/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 | 2.38% (0.02383) | 83.30th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.47% (0.02473) | 82.39th | v5 (v2026.06.15) |
| Mar 17, 2025 | 1.06% (0.01056) | 76.06th | v4 (v2025.03.14) |
| Feb 7, 2025 | 54.15% (0.54154) | 97.81th | v3 (v2023.03.01) |
| Dec 24, 2024 | 61.47% (0.61469) | 97.95th | v3 (v2023.03.01) |
| Dec 17, 2024 | 68.09% (0.68094) | 98.14th | v3 (v2023.03.01) |
| May 3, 2024 | 1.32% (0.01319) | 85.86th | v3 (v2023.03.01) |
| Mar 7, 2023 | 1.32% (0.01319) | 83.86th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.31% (0.01315) | 68.50th | v2 (v2022.01.01) |
| Feb 22, 2023 | 1.31% (0.01315) | 68.21th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.31% (0.01315) | 66.08th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.31% (0.01315) | 41.88th | v2 (v2022.01.01) |
References (13)
- http://secunia.com/advisories/47124 third-party-advisoryx_refsource_SECUNIAVendor Advisory
- http://securitytracker.com/id?1026374 vdb-entryx_refsource_SECTRACK
- http://web.mit.edu/Kerberos/advisories/MITKRB5-SA-2011-007.txt
- http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2011-007.txt x_refsource_CONFIRMPatch
- http://www.mandriva.com/security/advisories?name=MDVSA-2011:184 vendor-advisoryx_refsource_MANDRIVA
- http://www.redhat.com/support/errata/RHSA-2011-1790.html vendor-advisoryx_refsource_REDHAT
- http://www.securityfocus.com/archive/1/520756/100/0/threaded mailing-listx_refsource_BUGTRAQ
- http://www.securityfocus.com/bid/50929 vdb-entryx_refsource_BID
- https://access.redhat.com/security/cve/CVE-2011-1530 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=753748 Issue Tracking
- https://exchange.xforce.ibmcloud.com/vulnerabilities/71655 vdb-entryx_refsource_XF
- https://nvd.nist.gov/vuln/detail/CVE-2011-1530
- https://www.cve.org/CVERecord?id=CVE-2011-1530
| Link | Providers | Tags |
|---|---|---|
| http://secunia.com/advisories/47124 | third-party-advisoryx_refsource_SECUNIAVendor Advisory | |
| http://securitytracker.com/id?1026374 | vdb-entryx_refsource_SECTRACK | |
| http://web.mit.edu/Kerberos/advisories/MITKRB5-SA-2011-007.txt | ||
| http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2011-007.txt | x_refsource_CONFIRMPatch | |
| http://www.mandriva.com/security/advisories?name=MDVSA-2011:184 | vendor-advisoryx_refsource_MANDRIVA | |
| http://www.redhat.com/support/errata/RHSA-2011-1790.html | vendor-advisoryx_refsource_REDHAT | |
| http://www.securityfocus.com/archive/1/520756/100/0/threaded | mailing-listx_refsource_BUGTRAQ | |
| http://www.securityfocus.com/bid/50929 | vdb-entryx_refsource_BID | |
| https://access.redhat.com/security/cve/CVE-2011-1530 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=753748 | Issue Tracking | |
| https://exchange.xforce.ibmcloud.com/vulnerabilities/71655 | vdb-entryx_refsource_XF | |
| https://nvd.nist.gov/vuln/detail/CVE-2011-1530 | ||
| https://www.cve.org/CVERecord?id=CVE-2011-1530 |
Change history (0)
No recorded changes yet.