MIT Kerberos up to 5-1.9 schpw.c process_chpw_request input validation

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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9.4$0-$5k0.00

A vulnerability has been found in MIT Kerberos up to 5-1.9 (Network Authentication Software) and classified as very critical. This vulnerability affects the function process_chpw_request of the file schpw.c of the component Kerberos. The manipulation with an unknown input leads to a input validation vulnerability. The CWE definition for the vulnerability is CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

The process_chpw_request function in schpw.c in the password-changing functionality in kadmind in MIT Kerberos 5 (aka krb5) 1.7 through 1.9 frees an invalid pointer, which allows remote attackers to execute arbitrary code or cause a denial of service (daemon crash) via a crafted request that triggers an error condition.

The weakness was presented 04/12/2011 as confirmed posting (Bugtraq). The advisory is available at securityfocus.com. This vulnerability was named CVE-2011-0285 since 01/03/2011. The exploitation appears to be easy. 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. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 01/19/2025).

It is possible to download the exploit at exploit-db.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 75562 (openSUSE Security Update : krb5 (openSUSE-SU-2011:0348-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family SuSE Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 119159 (Red Hat Update for krb5 (RHSA-2011:0447)).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at Exploit-DB (35606), Tenable (75562), SecurityFocus (BID 47310†), OSVDB (71789†) and Secunia (SA44125†). 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: 10.0
VulDB Meta Temp Score: 9.4

VulDB Base Score: 10.0
VulDB Temp Score: 9.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
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VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

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: 75562
Nessus Name: openSUSE Security Update : krb5 (openSUSE-SU-2011:0348-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 69595
OpenVAS Name: FreeBSD Ports: krb5
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

01/03/2011 🔍
04/11/2011 +98 days 🔍
04/11/2011 +0 days 🔍
04/11/2011 +0 days 🔍
04/12/2011 +1 days 🔍
04/12/2011 +0 days 🔍
04/12/2011 +0 days 🔍
04/14/2011 +1 days 🔍
04/14/2011 +0 days 🔍
06/13/2014 +1155 days 🔍
03/23/2015 +283 days 🔍
01/19/2025 +3590 days 🔍

Sourcesinfo

Vendor: mit.edu

Advisory: RHSA-2011:0447⛔
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2011-0285 (🔍)
GCVE (CVE): GCVE-0-2011-0285
GCVE (VulDB): GCVE-100-57118

OVAL: 🔍

SecurityFocus: 47310 - MIT Kerberos kadmind Change Password Feature Remote Code Execution Vulnerability
Secunia: 44125 - Kerberos kadmind Denial of Service Vulnerability, Less Critical
OSVDB: 71789 - Kerberos kadmind Unspecified Packet Handling Remote DoS
SecurityTracker: 1025320 - Kerberos kadmind Can Be Crashed By a Remote Users Conducting an NMAP Scan
Vulnerability Center: 30993 - MIT Kerberos 5 1.7 through 1.8.4 \x27kadmind\x27 Remote Arbitrary Code Execution Vulnerability, Critical
Vupen: ADV-2011-0936

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

Entryinfo

Created: 03/23/2015 04:50 PM
Updated: 01/19/2025 07:38 AM
Changes: 03/23/2015 04:50 PM (67), 03/21/2017 08:04 AM (18), 11/02/2021 04:44 PM (3), 11/02/2021 04:52 PM (1), 09/16/2024 09:53 PM (18), 01/19/2025 07:38 AM (4)
Complete: 🔍
Cache ID: 18:9FC:40

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