MIT Kerberos 5-1.6.1 svc_auth_unix.c gssrpc__svcauth_unix memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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8.6$0-$5k0.00

A vulnerability was found in MIT Kerberos 5-1.6.1 (Network Authentication Software). It has been rated as critical. This issue affects the function gssrpc__svcauth_unix of the file svc_auth_unix.c. The manipulation with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to 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. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Integer signedness error in the gssrpc__svcauth_unix function in svc_auth_unix.c in the RPC library in MIT Kerberos 5 (krb5) 1.6.1 and earlier might allow remote attackers to execute arbitrary code via a negative length value.

The bug was discovered 06/26/2007. The weakness was published 06/26/2007 by DiGiT with Secunia Research (Website). It is possible to read the advisory at us-cert.gov. The identification of this vulnerability is CVE-2007-2443 since 05/02/2007. The attack needs to be initiated within the local network. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit.

It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 25574 (CentOS 3 : krb5 (CESA-2007:0384)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CentOS Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 118148 (HP-UX Running Kerberos Remote Denial of Service Vulnerability (HPSBUX02544)).

Upgrading eliminates this vulnerability. A possible mitigation has been published before and not just after the disclosure of the vulnerability. Attack attempts may be identified with Snort ID 12046. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 8950.

The vulnerability is also documented in the databases at X-Force (35085) and Tenable (25574). Similar entries are available at 23424, 25650, 26472 and 34597.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
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CVSSv3info

VulDB Meta Base Score: 9.6
VulDB Meta Temp Score: 8.6

VulDB Base Score: 9.6
VulDB Temp Score: 8.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
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Exploitinginfo

Class: Memory corruption
CWE: CWE-119
ATT&CK: Unknown

Local: No
Remote: Partially

Availability: 🔍
Status: Proof-of-Concept

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EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 25574
Nessus Name: CentOS 3 : krb5 (CESA-2007:0384)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 58445
OpenVAS Name: Debian Security Advisory DSA 1323-1 (krb5)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍
Snort ID: 12046
TippingPoint: 🔍
PaloAlto IPS: 🔍
Fortigate IPS: 🔍

Timelineinfo

05/02/2007 🔍
06/26/2007 +55 days 🔍
06/26/2007 +0 days 🔍
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06/27/2007 +0 days 🔍
06/27/2007 +0 days 🔍
06/27/2007 +0 days 🔍
07/02/2007 +4 days 🔍
08/01/2007 +30 days 🔍
03/15/2015 +2783 days 🔍
07/21/2019 +1589 days 🔍

Sourcesinfo

Vendor: mit.edu

Advisory: us-cert.gov
Researcher: DiGiT
Organization: Secunia Research
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2007-2443 (🔍)
OVAL: 🔍

X-Force: 35085
SecurityTracker: 1018293
Vulnerability Center: 15510 - MIT Kerberos Integer Signedness Error Allows Arbitrary Code Execution, High
SecurityFocus: 25159 - Apple Mac OS X 2007-007 Multiple Security Vulnerabilities
Secunia: 25800
OSVDB: 36597 - MIT Kerberos 5 RPC Library gssrpc__svcauth_unix Function Remote Code Execution
Vupen: ADV-2007-2337

See also: 🔍

Entryinfo

Created: 03/15/2015 15:58
Updated: 07/21/2019 10:17
Changes: 03/15/2015 15:58 (88), 07/21/2019 10:17 (6)
Complete: 🔍

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