VDB-3511 · CVE-2007-6434 · BID 26831

Linux Kernel 2.6.23 mmap_min_addr access control

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.0$0-$5k0.00

Summaryinfo

A vulnerability marked as problematic has been reported in Linux Kernel 2.6.23. This affects the function mmap_min_addr. This manipulation causes access control. This vulnerability is handled as CVE-2007-6434. There is not any exploit available. Disabling the affected component is recommended.

Detailsinfo

A vulnerability classified as critical was found in Linux Kernel 2.6.23 (Operating System). Affected by this vulnerability is the function mmap_min_addr. The manipulation with an unknown input leads to a access control vulnerability. The CWE definition for the vulnerability is CWE-264. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Linux kernel 2.6.23 allows local users to create low pages in virtual userspace memory and bypass mmap_min_addr protection via a crafted executable file that calls the do_brk function.

The issue has been introduced in 10/09/2007. The weakness was released 12/12/2007 with kernel.org (Website). It is possible to read the advisory at kernel.org. This vulnerability is known as CVE-2007-6434 since 12/18/2007. The attack needs to be initiated within the local network. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 04/13/2019). The attack technique deployed by this issue is T1068 according to MITRE ATT&CK.

It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 64 days. During that time the estimated underground price was around $25k-$100k.

Upgrading to version 2.6.24-rc5 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at kernel.org. The best possible mitigation is suggested to be disabling the affected component.

The vulnerability is also documented in the databases at SecurityFocus (BID 26831†), OSVDB (40907†) and Secunia (SA28070†). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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Vendor

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Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.0

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
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: Access control
CWE: CWE-264
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔍
Status: Proof-of-Concept

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Disable
Status: 🔍

0-Day Time: 🔍

Upgrade: Kernel 2.6.24-rc5
Patch: kernel.org

Timelineinfo

10/09/2007 🔍
12/11/2007 +63 days 🔍
12/12/2007 +1 days 🔍
12/12/2007 +0 days 🔍
12/12/2007 +0 days 🔍
12/18/2007 +5 days 🔍
12/18/2007 +0 days 🔍
12/18/2007 +0 days 🔍
04/13/2019 +4134 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: kernel.org
Organization: kernel.org
Status: Not defined
Confirmation: 🔍

CVE: CVE-2007-6434 (🔍)
GCVE (CVE): GCVE-0-2007-6434
GCVE (VulDB): GCVE-100-3511
SecurityFocus: 26831 - Linux Kernel Mmap_min_addr Local Security Bypass Vulnerability
Secunia: 28070 - Linux Kernel "mmap_min_addr" Security Bypass, Not Critical
OSVDB: 40907 - Linux Kernel Crafted Executable do_brk Function mmap_min_addr Protection Bypass
Vupen: ADV-2007-4200

Entryinfo

Created: 12/18/2007 17:25
Updated: 04/13/2019 18:27
Changes: 12/18/2007 17:25 (71), 04/13/2019 18:27 (3)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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