Novell Client 4.91 input validation

CVSS Meta Temp Score
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CTI Interest Score
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7.9$0-$5k0.00

Summaryinfo

A vulnerability categorized as problematic has been discovered in Novell Client 4.91. Affected by this issue is some unknown functionality. Such manipulation leads to input validation. This vulnerability is documented as CVE-2007-5667. There is not any exploit available.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Novell Client 4.91. Affected by this issue is an unknown functionality. The manipulation with an unknown input leads to a input validation vulnerability. Using CWE to declare the problem leads to 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. Impacted is confidentiality, integrity, and availability. CVE summarizes:

NWFILTER.SYS in Novell Client 4.91 SP 1 through SP 4 for Windows 2000, XP, and Server 2003 makes the \.\nwfilter device available for arbitrary user-mode input via METHOD_NEITHER IOCTLs, which allows local users to gain privileges by passing a kernel address as an argument and overwriting kernel memory locations.

The bug was discovered 11/12/2007. The weakness was released 11/13/2007 by Stephen Fewer with Harmony Security (Website). The advisory is shared for download at secure-support.novell.com. This vulnerability is handled as CVE-2007-5667 since 10/23/2007. The exploitation is known to be easy. The attack needs to be approached locally. No form of authentication is required for exploitation. There are neither technical details nor an exploit publicly available.

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 commercial vulnerability scanner Qualys is able to test this issue with plugin 115664 (Novell Client for Windows NWFILTER.SYS Local Privilege Escalation Vulnerability).

A possible mitigation has been published before and not just after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (38434), SecurityFocus (BID 26420†), OSVDB (40867†), Secunia (SA27678†) and SecurityTracker (ID 1018943†). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Vendor

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Version

License

Support

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.4
VulDB Meta Temp Score: 7.9

VulDB Base Score: 8.4
VulDB Temp Score: 7.9
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: Input validation
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Proof-of-Concept

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

10/23/2007 🔍
11/12/2007 +20 days 🔍
11/12/2007 +0 days 🔍
11/13/2007 +0 days 🔍
11/13/2007 +0 days 🔍
11/13/2007 +0 days 🔍
11/13/2007 +0 days 🔍
11/13/2007 +0 days 🔍
11/13/2007 +0 days 🔍
11/14/2007 +1 days 🔍
11/18/2007 +3 days 🔍
03/16/2015 +2675 days 🔍
06/02/2025 +3731 days 🔍

Sourcesinfo

Vendor: novell.com

Advisory: secure-support.novell.com
Researcher: Stephen Fewer
Organization: Harmony Security
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2007-5667 (🔍)
GCVE (CVE): GCVE-0-2007-5667
GCVE (VulDB): GCVE-100-39656
X-Force: 38434
SecurityFocus: 26420 - Novell Client for Windows NWFILTER.SYS Local Privilege Escalation Vulnerability
Secunia: 27678
OSVDB: 40867 - Novell Client NWFILTER.SYS Local Privilege Escalation
SecurityTracker: 1018943
Vulnerability Center: 16827 - Novell Client NWFILTER.SYS Allows Local Users to Execute Arbitrary Code with Root Privileges, High
Vupen: ADV-2007-3846

Entryinfo

Created: 03/16/2015 13:43
Updated: 06/02/2025 15:39
Changes: 03/16/2015 13:43 (72), 07/30/2019 11:51 (1), 06/02/2025 15:39 (18)
Complete: 🔍
Cache ID: 216:268:103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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