MIT Kerberos 5-1.6.3 asn1buf_imbed numeric error

CVSS Meta Temp Score
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CTI Interest Score
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4.8$0-$5k0.00

Summaryinfo

A vulnerability has been found in MIT Kerberos 5-1.6.3 and classified as problematic. Affected by this issue is the function asn1buf_imbed. Performing a manipulation results in numeric error. This vulnerability is identified as CVE-2009-0847. There is not any exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as problematic, was found in MIT Kerberos 5-1.6.3 (Network Authentication Software). This affects the function asn1buf_imbed. The manipulation with an unknown input leads to a numeric error vulnerability. CWE is classifying the issue as CWE-189. This is going to have an impact on availability. The summary by CVE is:

The asn1buf_imbed function in the ASN.1 decoder in MIT Kerberos 5 (aka krb5) 1.6.3, when PK-INIT is used, allows remote attackers to cause a denial of service (application crash) via a crafted length value that triggers an erroneous malloc call, related to incorrect calculations with pointer arithmetic.

The bug was discovered 04/07/2009. The weakness was released 04/08/2009 with Apple Product Security (Website). It is possible to read the advisory at us-cert.gov. This vulnerability is uniquely identified as CVE-2009-0847 since 03/06/2009. It is possible to initiate the attack remotely. No form of 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 1 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 43739 (CentOS 5 : krb5 (CESA-2009:0408)), 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 185031 (HP-UX Running Kerberos Multiple Vulnerabilities (HPSBUX02421)).

Upgrading eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (49750), Tenable (43739), SecurityFocus (BID 34408†), OSVDB (53385†) and Secunia (SA34640†). Entries connected to this vulnerability are available at VDB-23858, VDB-30376, VDB-40710 and VDB-42878. Be aware that VulDB is the high quality 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: 5.3
VulDB Meta Temp Score: 4.8

VulDB Base Score: 5.3
VulDB Temp Score: 4.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

Exploitinginfo

Class: Numeric error
CWE: CWE-189
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Proof-of-Concept

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 43739
Nessus Name: CentOS 5 : krb5 (CESA-2009:0408)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 63793
OpenVAS Name: Debian Security Advisory DSA 1766-1 (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: 🔍

Timelineinfo

03/06/2009 🔍
04/07/2009 +32 days 🔍
04/07/2009 +0 days 🔍
04/07/2009 +0 days 🔍
04/07/2009 +0 days 🔍
04/08/2009 +1 days 🔍
04/08/2009 +0 days 🔍
04/08/2009 +0 days 🔍
04/08/2009 +0 days 🔍
04/13/2009 +5 days 🔍
01/06/2010 +268 days 🔍
03/17/2015 +1896 days 🔍
09/01/2019 +1629 days 🔍

Sourcesinfo

Vendor: mit.edu

Advisory: us-cert.gov
Organization: Apple Product Security
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2009-0847 (🔍)
GCVE (CVE): GCVE-0-2009-0847
GCVE (VulDB): GCVE-100-47631

OVAL: 🔍

X-Force: 49750
SecurityFocus: 34408 - MIT Kerberos SPNEGO and ASN.1 Multiple Remote Denial Of Service Vulnerabilities
Secunia: 34640
OSVDB: 53385 - CVE-2009-0847 - MIT - Kerberos - Denial-of-Service Issue
SecurityTracker: 1021993
Vulnerability Center: 21532 - MIT Kerberos 5 1.6.3 asn1buf_imbed Function Remote DoS Vulnerability via PK-INIT is Used, High
Vupen: ADV-2009-0960

See also: 🔍

Entryinfo

Created: 03/17/2015 23:38
Updated: 09/01/2019 09:37
Changes: 03/17/2015 23:38 (83), 09/01/2019 09:37 (5)
Complete: 🔍
Cache ID: 216::103

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