Linux Kernel 2.6.16.15 fs/locks.c lease_init memory leak

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.9$0-$5k0.00

A vulnerability classified as problematic was found in Linux Kernel 2.6.16.15 (Operating System). This vulnerability affects the function lease_init of the file fs/locks.c. 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. CVE summarizes:

Memory leak in __setlease in fs/locks.c in Linux kernel before 2.6.16.16 allows attackers to cause a denial of service (memory consumption) via unspecified actions related to an "uninitialised return value," aka "slab leak."

The bug was discovered 05/07/2006. The weakness was shared 05/11/2006 by Daniel Hokka Zakrisson and B. Steinbrink (Website). The advisory is shared for download at kernel.org. This vulnerability was named CVE-2006-1859 since 04/19/2006. Access to the local network is required for this attack. No form of authentication is required for a successful exploitation. There are known technical details, but no exploit is available.

It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 52 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 22058 (Mandrake Linux Security Advisory : kernel (MDKSA-2006:123)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Mandriva Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 165140 (SUSE Security Update for kernel (SUSE-SA:2006:042)).

Upgrading 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 upgrading to the latest version. A possible mitigation has been published 3 months after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (26438) and Tenable (22058). The entries 2108, 2326, 2360 and 2476 are related to this item.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

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CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 5.9

VulDB Base Score: 6.5
VulDB Temp Score: 5.9
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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Exploitinginfo

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

Local: No
Remote: Partially

Availability: 🔍
Status: Proof-of-Concept

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Nessus ID: 22058
Nessus Name: Mandrake Linux Security Advisory : kernel (MDKSA-2006:123)
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Threat Intelligenceinfo

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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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Patch: kernel.org

Timelineinfo

03/20/2006 🔍
04/19/2006 +30 days 🔍
05/07/2006 +18 days 🔍
05/11/2006 +4 days 🔍
05/11/2006 +0 days 🔍
05/11/2006 +0 days 🔍
05/11/2006 +0 days 🔍
05/15/2006 +4 days 🔍
05/19/2006 +4 days 🔍
06/19/2006 +31 days 🔍
07/13/2006 +23 days 🔍
07/18/2006 +5 days 🔍
07/25/2006 +7 days 🔍
06/23/2019 +4716 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: kernel.org
Researcher: Daniel Hokka Zakrisson, B. Steinbrink
Status: Not defined
Confirmation: 🔍

CVE: CVE-2006-1859 (🔍)
X-Force: 26438 - Linux kernel fs/locks __setlease() denial of service, Medium Risk
Vulnerability Center: 12362 - Linux Kernel Denial of Service Vulnerability in __setlease, Medium
SecurityFocus: 18033 - Linux Kernel __SetLease Local Denial of Service Vulnerability
Secunia: 20083 - Linux Kernel "lease_init()" Denial of Service Vulnerability, Not Critical
OSVDB: 26616 - Linux Kernel fs/locks.c __setlease Function Memory Leak DoS
Vupen: ADV-2006-1767

See also: 🔍

Entryinfo

Created: 05/15/2006 11:31
Updated: 06/23/2019 16:12
Changes: 05/15/2006 11:31 (95), 06/23/2019 16:12 (2)
Complete: 🔍

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