MIT Kerberos 5-1.6 k5unseal.c memory corruption

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
8.9$0-$5k0.00

A vulnerability classified as critical was found in MIT Kerberos 5-1.6 (Network Authentication Software). Affected by this vulnerability is an unknown code in the library lib/gssapi/krb5/k5unseal.c. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Double free vulnerability in the GSS-API library (lib/gssapi/krb5/k5unseal.c), as used by the Kerberos administration daemon (kadmind) in MIT krb5 before 1.6.1, when used with the authentication method provided by the RPCSEC_GSS RPC library, allows remote authenticated users to execute arbitrary code and modify the Kerberos key database via a message with an "an invalid direction encoding".

The bug was discovered 04/03/2007. The weakness was shared 04/05/2007 as confirmed advisory (CERT.org). It is possible to read the advisory at kb.cert.org. This vulnerability is known as CVE-2007-1216 since 03/02/2007. The attack can be launched remotely. A single authentication is needed for exploitation. Technical details of the vulnerability are known, but there is no available exploit.

It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 2 days. During that time the estimated underground price was around $25k-$100k. The vulnerability scanner Nessus provides a plugin with the ID 26144 (HP-UX PHSS_34991 : HP-UX running Kerberos, Remote Arbitrary Code Execution (HPSBUX02217 SSRT071337 rev.2)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family HP-UX Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 156081 (Oracle Enterprise Linux Update for krb5 (ELSA-2007-0095)).

Upgrading to version 1.6.1 eliminates this vulnerability. A possible mitigation has been published 2 months after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (33413), Tenable (26144), SecurityFocus (BID 23282†), OSVDB (34105†) and Secunia (SA24706†). The entries VDB-36017 and VDB-36016 are related to this item. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.9
VulDB Meta Temp Score: 8.9

VulDB Base Score: 9.9
VulDB Temp Score: 8.9
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
unlockunlockunlockunlockunlockunlock
unlockunlockunlockunlockunlockunlock
unlockunlockunlockunlockunlockunlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Yes

Availability: 🔍
Status: Proof-of-Concept

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Dayunlockunlockunlockunlock
Todayunlockunlockunlockunlock

Nessus ID: 26144
Nessus Name: HP-UX PHSS_34991 : HP-UX running Kerberos, Remote Arbitrary Code Execution (HPSBUX02217 SSRT071337 rev.2)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍

OpenVAS ID: 58328
OpenVAS Name: Debian Security Advisory DSA 1276-1 (krb5)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: Kerberos 1.6.1

Timelineinfo

03/02/2007 🔍
04/03/2007 +32 days 🔍
04/03/2007 +0 days 🔍
04/03/2007 +0 days 🔍
04/03/2007 +0 days 🔍
04/04/2007 +1 days 🔍
04/05/2007 +1 days 🔍
04/05/2007 +0 days 🔍
04/10/2007 +5 days 🔍
05/08/2007 +28 days 🔍
09/25/2007 +140 days 🔍
03/13/2015 +2726 days 🔍
01/12/2025 +3593 days 🔍

Sourcesinfo

Vendor: mit.edu

Advisory: kb.cert.org
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2007-1216 (🔍)
GCVE (CVE): GCVE-0-2007-1216
GCVE (VulDB): GCVE-100-36019

OVAL: 🔍

CERT: 🔍
X-Force: 33413
SecurityFocus: 23282 - MIT Kerberos Administration Daemon Kadmind Double Free Memory Corruption Vulnerabilities
Secunia: 24706 - Ubuntu update for krb5, Moderately Critical
OSVDB: 34105 - CVE-2007-1216 - MIT - Kerberos - Double Free Issue
SecurityTracker: 1017852
Vulnerability Center: 14785 - MIT Kerberos 5 GSS-API Library Double-Free Vulnerability, High
Vupen: ADV-2007-1218

See also: 🔍

Entryinfo

Created: 03/13/2015 02:56 PM
Updated: 01/12/2025 07:13 PM
Changes: 03/13/2015 02:56 PM (90), 07/17/2019 02:17 PM (4), 01/12/2025 07:13 PM (17)
Complete: 🔍
Cache ID: 18:9C4:40

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Want to stay up to date on a daily basis?

Enable the mail alert feature now!