MIT Kerberos up to 5-1.6.2 lib/rpc/svc_auth_gss.c RPCSEC_GSS memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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6.4$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, was found in MIT Kerberos up to 5-1.6.2. This vulnerability affects unknown code of the file lib/rpc/svc_auth_gss.c. Executing a manipulation of the argument RPCSEC_GSS can lead to memory corruption. This vulnerability is tracked as CVE-2007-3999. Moreover, an exploit is present. Disabling the affected component is suggested.

Detailsinfo

A vulnerability was found in MIT Kerberos up to 5-1.6.2 (Network Authentication Software). It has been declared as critical. This vulnerability affects some unknown functionality of the file lib/rpc/svc_auth_gss.c. The manipulation of the argument RPCSEC_GSS 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. CVE summarizes:

Stack-based buffer overflow in the svcauth_gss_validate function in lib/rpc/svc_auth_gss.c in the RPCSEC_GSS RPC library (librpcsecgss) in MIT Kerberos 5 (krb5) 1.4 through 1.6.2, as used by the Kerberos administration daemon (kadmind) and some third-party applications that use krb5, allows remote attackers to cause a denial of service (daemon crash) and probably execute arbitrary code via a long string in an RPC message.

The weakness was disclosed 09/05/2007 by Garrett Wollman with Tenable (Website). The advisory is shared for download at web.mit.edu. The public release has been coordinated in cooperation with the vendor. This vulnerability was named CVE-2007-3999 since 07/25/2007. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details and also a public exploit are known.

It is possible to download the exploit at saintcorporation.com. It is declared as proof-of-concept. As 0-day the estimated underground price was around $25k-$100k. The vulnerability scanner Nessus provides a plugin with the ID 67562 (Oracle Linux 5 : krb5 (ELSA-2007-0858)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Oracle Linux Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 156043 (Oracle Enterprise Linux Update for Krb5 (ELSA-2007-0858)).

Upgrading to version krb5-1.6.3 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at web.mit.edu. The best possible mitigation is suggested to be disabling the affected component. A possible mitigation has been published even before and not after the disclosure of the vulnerability. Attack attempts may be identified with Snort ID 12424. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 5503.

The vulnerability is also documented in the databases at X-Force (36437), Tenable (67562), SecurityFocus (BID 25534†), OSVDB (37324†) and Secunia (SA26676†). The entries VDB-3291 and VDB-38642 are pretty similar. Once again VulDB remains the best source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 6.4

VulDB Base Score: 7.3
VulDB Temp Score: 6.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
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NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: 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: 67562
Nessus Name: Oracle Linux 5 : krb5 (ELSA-2007-0858)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍

OpenVAS ID: 58587
OpenVAS Name: Debian Security Advisory DSA 1367-1 (krb5)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Saint ID: exploit_info/mit_krb5_rpcsec_gss
Saint Name: MIT Kerberos 5 RPC library RPCSEC_GSS buffer overflow

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Disable
Status: 🔍

0-Day Time: 🔍

Upgrade: Kerberos krb5-1.6.3
Patch: web.mit.edu

Snort ID: 12424
TippingPoint: 🔍

McAfee IPS: 🔍
McAfee IPS Version: 🔍

ISS Proventia IPS: 🔍
PaloAlto IPS: 🔍
Fortigate IPS: 🔍

Timelineinfo

07/25/2007 🔍
09/04/2007 +41 days 🔍
09/04/2007 +0 days 🔍
09/04/2007 +0 days 🔍
09/04/2007 +0 days 🔍
09/05/2007 +1 days 🔍
09/05/2007 +0 days 🔍
09/05/2007 +0 days 🔍
09/09/2007 +3 days 🔍
09/12/2007 +3 days 🔍
07/12/2013 +2130 days 🔍
01/11/2025 +4201 days 🔍

Sourcesinfo

Vendor: mit.edu

Advisory: web.mit.edu
Researcher: Garrett Wollman
Organization: Tenable
Status: Confirmed
Confirmation: 🔍
Coordinated: 🔍

CVE: CVE-2007-3999 (🔍)
GCVE (CVE): GCVE-0-2007-3999
GCVE (VulDB): GCVE-100-3292

OVAL: 🔍

CERT: 🔍
X-Force: 36437 - Kerberos kadmind svcauth_gss_validate buffer overflow, High Risk
SecurityFocus: 25534 - MIT Kerberos 5 KAdminD Server SVCAuth_GSS_Validate Stack Buffer Overflow Vulnerability
Secunia: 26676 - Kerberos Multiple Vulnerabilities, Highly Critical
OSVDB: 37324 - MIT Kerberos 5 RPCSEC_GSS RPC Library (librpcsecgss) lib/rpc/svc_auth_gss.c svcauth_gss_validate Function Remote Overflow
SecurityTracker: 1018647 - Kerberos kadmind Stack Overflow and Uninitialized Pointer Lets Remote Users Execute Arbitrary Code
Vulnerability Center: 15999 - MIT Kerberos 5 Stack-Based Buffer Overflow Allows Remote Attacker Code Execution and DoS, Critical
Vupen: ADV-2007-3051

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

Entryinfo

Created: 09/12/2007 15:19
Updated: 01/11/2025 18:41
Changes: 09/12/2007 15:19 (109), 08/18/2017 13:47 (7), 03/15/2021 17:39 (3), 01/11/2025 18:41 (16)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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