MIT Kerberos 5-1.14 kadmin kadm5_modify_principal null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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7.0$0-$5k0.00

A vulnerability was found in MIT Kerberos 5-1.14 (Network Authentication Software). It has been declared as critical. This vulnerability affects the function kadm5_modify_principal of the component kadmin. The manipulation with an unknown input leads to a null pointer dereference vulnerability. The CWE definition for the vulnerability is CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. As an impact it is known to affect availability.

The weakness was presented 02/03/2016 as confirmed git commit (GIT Repository). The advisory is available at github.com. This vulnerability was named CVE-2015-8630 since 12/23/2015. The exploitation appears to be easy. The attack can be initiated remotely. A single authentication is necessary for exploitation. Technical details are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 88581 (Debian DSA-3466-1 : krb5 - security update), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 350010 (Amazon Linux Security Advisory for krb5: ALAS-2016-691).

Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com. A possible mitigation has been published 22 hours after the disclosure of the vulnerability. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 23817.

The vulnerability is also documented in the databases at X-Force (110394) and Tenable (88581). See 80817 for similar entry.

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CPE 2.3info

CPE 2.2info

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CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.0

VulDB Base Score: 7.5
VulDB Temp Score: 6.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
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CVSSv2info

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Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Status: Unproven

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Nessus ID: 88581
Nessus Name: Debian DSA-3466-1 : krb5 - security update
Nessus File: 🔍
Nessus Risk: 🔍
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OpenVAS ID: 703466
OpenVAS Name: Debian Security Advisory DSA 3466-1 (krb5 - security update)
OpenVAS File: 🔍
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Threat Intelligenceinfo

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Countermeasuresinfo

Recommended: Patch
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Patch: github.com
TippingPoint: 🔍

Timelineinfo

12/23/2015 🔍
01/07/2016 +15 days 🔍
01/07/2016 +0 days 🔍
02/03/2016 +26 days 🔍
02/03/2016 +0 days 🔍
02/04/2016 +1 days 🔍
02/08/2016 +3 days 🔍
02/12/2016 +4 days 🔍
02/15/2016 +3 days 🔍
07/07/2022 +2333 days 🔍

Sourcesinfo

Vendor: mit.edu

Advisory: b863de7fbf080b15e347a736fdda0a82d42f4f6b
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2015-8630 (🔍)
X-Force: 110394 - MIT Kerberos kadm5_modify_principal() function denial of service
SecurityTracker: 1034915
Vulnerability Center: 56613 - MIT Kerberos 5 Remote DoS in Lib/kadm5/srv/svr_principal.c, Medium
SecurityFocus: 82802 - MIT Kerberos 5 CVE-2015-8630 Denial of Service Vulnerability

See also: 🔍

Entryinfo

Created: 02/08/2016 09:28
Updated: 07/07/2022 08:46
Changes: 02/08/2016 09:28 (77), 08/22/2018 10:00 (14), 07/07/2022 08:43 (5), 07/07/2022 08:46 (1)
Complete: 🔍

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