Linux Kernel 2.6.21 memory leak

CVSS Meta Temp Score
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CTI Interest Score
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5.6$0-$5k0.00

Summaryinfo

A vulnerability was found in Linux Kernel 2.6.21. It has been rated as problematic. Affected by this issue is some unknown functionality. This manipulation causes memory leak. This vulnerability is handled as CVE-2007-2525. There is not any exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability classified as problematic was found in Linux Kernel 2.6.21 (Operating System). Affected by this vulnerability is an unknown function. The manipulation with an unknown input leads to a memory leak vulnerability. The CWE definition for the vulnerability is CWE-401. The product does not sufficiently track and release allocated memory after it has been used, which slowly consumes remaining memory. As an impact it is known to affect availability. The summary by CVE is:

Memory leak in the PPP over Ethernet (PPPoE) socket implementation in the Linux kernel before 2.6.21-git8 allows local users to cause a denial of service (memory consumption) by creating a socket using connect, and releasing it before the PPPIOCGCHAN ioctl is initialized.

The bug was discovered 05/07/2007. The weakness was released 05/08/2007 (Website). It is possible to read the advisory at secunia.com. This vulnerability is known as CVE-2007-2525 since 05/08/2007. The exploitation appears to be easy. Attacking locally is a requirement. The exploitation doesn't need any form of authentication. The technical details are unknown and an exploit is not publicly available.

It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 12 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 28114 (Ubuntu 7.04 : linux-source-2.6.20 vulnerabilities (USN-510-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Ubuntu Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 156102 (Oracle Enterprise Linux Update for Kernel (ELSA-2007-0376)).

Upgrading to version 2.6.21-git8 eliminates this vulnerability. A possible mitigation has been published 5 months after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (34150), Tenable (28114), SecurityFocus (BID 23870†), OSVDB (35929†) and Secunia (SA25163†). Entries connected to this vulnerability are available at VDB-36765, VDB-36319, VDB-37467 and VDB-37242. 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: 6.2
VulDB Meta Temp Score: 5.6

VulDB Base Score: 6.2
VulDB Temp Score: 5.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Memory leak
CWE: CWE-401 / CWE-404
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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Nessus ID: 28114
Nessus Name: Ubuntu 7.04 : linux-source-2.6.20 vulnerabilities (USN-510-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍

OpenVAS ID: 58528
OpenVAS Name: Debian Security Advisory DSA 1356-1 (linux-2.6)
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: 🔍

Upgrade: Kernel 2.6.21-git8

Timelineinfo

04/26/2007 🔍
05/07/2007 +11 days 🔍
05/07/2007 +0 days 🔍
05/07/2007 +0 days 🔍
05/08/2007 +1 days 🔍
05/08/2007 +0 days 🔍
05/08/2007 +0 days 🔍
05/08/2007 +0 days 🔍
06/25/2007 +48 days 🔍
08/31/2007 +67 days 🔍
11/10/2007 +71 days 🔍
03/13/2015 +2680 days 🔍
07/20/2019 +1590 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: secunia.com⛔
Status: Not defined
Confirmation: 🔍

CVE: CVE-2007-2525 (🔍)
GCVE (CVE): GCVE-0-2007-2525
GCVE (VulDB): GCVE-100-36631

OVAL: 🔍

X-Force: 34150
SecurityFocus: 23870 - Linux Kernel PPPoE Socket Local Denial of Service Vulnerability
Secunia: 25163
OSVDB: 35929 - CVE-2007-2525 - Linux - Kernel - Denial-Of-Service Issue
Vulnerability Center: 15433 - Linux Kernel Memory Leak Allows Local Users to Cause DoS, Low
Vupen: ADV-2007-1703

See also: 🔍

Entryinfo

Created: 03/13/2015 14:56
Updated: 07/20/2019 20:26
Changes: 03/13/2015 14:56 (83), 07/20/2019 20:26 (4)
Complete: 🔍
Cache ID: 216::103

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

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