MIT Kerberos 5-1.6 Key Distribution Center krb5_klog_syslog stack-based overflow

CVSS Meta Temp Score
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CTI Interest Score
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8.9$0-$5k0.00

Summaryinfo

A vulnerability identified as critical has been detected in MIT Kerberos 5-1.6. This vulnerability affects the function krb5_klog_syslog of the component Key Distribution Center. The manipulation leads to stack-based overflow. This vulnerability is uniquely identified as CVE-2007-0957. Moreover, an exploit is present. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in MIT Kerberos 5-1.6 (Network Authentication Software). It has been rated as critical. This issue affects the function krb5_klog_syslog of the component Key Distribution Center. The manipulation with an unknown input leads to a stack-based overflow vulnerability. Using CWE to declare the problem leads to CWE-121. A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Stack-based buffer overflow in the krb5_klog_syslog function in the kadm5 library, as used by the Kerberos administration daemon (kadmind) and Key Distribution Center (KDC), in MIT krb5 before 1.6.1 allows remote authenticated users to execute arbitrary code and modify the Kerberos key database via crafted arguments, possibly involving certain format string specifiers.

The bug was discovered 04/03/2007. The weakness was disclosed 04/05/2007 as confirmed advisory (CERT.org). The advisory is shared at kb.cert.org. The identification of this vulnerability is CVE-2007-0957 since 02/14/2007. The exploitation is known to be easy. The attack may be initiated remotely. A simple authentication is required for exploitation. Technical details as well as a public exploit are known.

The exploit is available at securityfocus.com. 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 $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 23444 , which helps to determine the existence of the flaw in a target environment. It is . 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. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 11763.

The vulnerability is also documented in the databases at X-Force (33411), Tenable (23444), SecurityFocus (BID 23285†), OSVDB (34104†) and Secunia (SA24706†). The entries VDB-36019 and VDB-36016 are pretty similar. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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

NVD Base Score: 🔍

Exploitinginfo

Class: Stack-based overflow
CWE: CWE-121 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 23444
Nessus File: 🔍
Nessus Risk: 🔍
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: 🔍

0-Day Time: 🔍

Upgrade: Kerberos 1.6.1
TippingPoint: 🔍
ISS Proventia IPS: 🔍
PaloAlto IPS: 🔍
Fortigate IPS: 🔍

Timelineinfo

02/14/2007 🔍
04/03/2007 +48 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 🔍
03/13/2015 +2894 days 🔍
01/12/2025 +3593 days 🔍

Sourcesinfo

Vendor: mit.edu

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

CVE: CVE-2007-0957 (🔍)
GCVE (CVE): GCVE-0-2007-0957
GCVE (VulDB): GCVE-100-36017

OVAL: 🔍

CERT: 🔍
X-Force: 33411
SecurityFocus: 23285 - MIT Kerberos 5 KAdminD Server Stack Buffer Overflow Vulnerability
Secunia: 24706 - Ubuntu update for krb5, Moderately Critical
OSVDB: 34104 - CVE-2007-0957 - MIT - Kerberos 5 - Buffer Overflow Issue
SecurityTracker: 1017849
Vulnerability Center: 14784 - MIT Kerberos 5 Kerberos Administration Daemon and Key Distribution Center Buffer Overflow, High
Vupen: ADV-2007-1250

scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍

Entryinfo

Created: 03/13/2015 14:56
Updated: 01/12/2025 18:07
Changes: 03/13/2015 14:56 (90), 07/17/2019 14:12 (4), 07/14/2021 08:59 (3), 01/12/2025 18:07 (15)
Complete: 🔍
Cache ID: 216:C63:103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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