Linux Kernel 2.6.10 locks.c fcntl_setlease 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 2.6.10 and classified as problematic. This impacts the function fcntl_setlease of the file locks.c. Such manipulation leads to memory leak. This vulnerability is referenced as CVE-2005-3807. Furthermore, an exploit is available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel 2.6.10 (Operating System). It has been rated as problematic. Affected by this issue is the function fcntl_setlease of the file locks.c. The manipulation with an unknown input leads to a memory leak vulnerability. Using CWE to declare the problem leads to CWE-401. The product does not sufficiently track and release allocated memory after it has been used, which slowly consumes remaining memory. Impacted is availability. CVE summarizes:

Memory leak in the VFS file lease handling in locks.c in Linux kernels 2.6.10 to 2.6.15 allows local users to cause a denial of service (memory exhaustion) via certain Samba activities that cause an fasync entry to be re-allocated by the fcntl_setlease function after the fasync queue has already been cleaned by the locks_delete_lock function.

The bug was discovered 11/29/2005. The weakness was published 11/25/2005 (Website). The advisory is shared for download at marc.theaimsgroup.com. This vulnerability is handled as CVE-2005-3807 since 11/25/2005. The exploitation is known to be easy. The attack needs to be approached locally. No form of authentication is required for exploitation. Technical details as well as a public exploit are known.

A public exploit has been developed in ANSI C. The exploit is available at securityfocus.com. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 336 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 20775 (Ubuntu 4.10 / 5.04 / 5.10 : linux-source-2.6.8.1/-2.6.10/-2.6.12 vulnerabilities (USN-231-1)), 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.

Upgrading eliminates this vulnerability. A possible mitigation has been published 4 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (23467), Exploit-DB (26749), Tenable (20775), SecurityFocus (BID 15745†) and OSVDB (21517†). Similar entries are available at VDB-1817, VDB-27130, VDB-27079 and VDB-27078. VulDB is the best source for vulnerability data and more expert information about this specific topic.

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: 🔍
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NVD Base Score: 🔍

Exploitinginfo

Class: Memory leak
CWE: CWE-401 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Programming Language: 🔍
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 20775
Nessus Name: Ubuntu 4.10 / 5.04 / 5.10 : linux-source-2.6.8.1/-2.6.10/-2.6.12 vulnerabilities (USN-231-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Timelineinfo

12/24/2004 🔍
11/25/2005 +336 days 🔍
11/25/2005 +0 days 🔍
11/25/2005 +0 days 🔍
11/29/2005 +4 days 🔍
11/29/2005 +0 days 🔍
11/29/2005 +0 days 🔍
12/06/2005 +7 days 🔍
12/13/2005 +7 days 🔍
12/22/2005 +9 days 🔍
01/21/2006 +30 days 🔍
03/11/2015 +3336 days 🔍
12/18/2024 +3570 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: marc.theaimsgroup.com
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2005-3807 (🔍)
GCVE (CVE): GCVE-0-2005-3807
GCVE (VulDB): GCVE-100-27080
X-Force: 23467
SecurityFocus: 15745 - Linux Kernel File Lock Lease Local Denial of Service Vulnerability
Secunia: 17917 - SUSE update for kernel, Less Critical
OSVDB: 21517 - Linux Kernel - File Lock Lease Local Denial of Service Issue
Vulnerability Center: 9962 - Linux Kernel Local Users DoS via Samba Activities, Medium

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

Entryinfo

Created: 03/11/2015 23:39
Updated: 12/18/2024 21:32
Changes: 03/11/2015 23:39 (79), 06/12/2019 16:23 (6), 12/18/2024 21:32 (19)
Complete: 🔍
Cache ID: 216::103

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