Linux Kernel 2.6.11.8 do_sigaltstack information disclosure

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 2.6.11.8 and classified as problematic. Affected is the function do_sigaltstack. Such manipulation leads to information disclosure. This vulnerability is documented as CVE-2009-2847. Additionally, an exploit exists.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Linux Kernel 2.6.11.8 (Operating System). Affected by this issue is the function do_sigaltstack. The manipulation with an unknown input leads to a information disclosure vulnerability. Using CWE to declare the problem leads to CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. Impacted is confidentiality. CVE summarizes:

The do_sigaltstack function in kernel/signal.c in Linux kernel 2.4 through 2.4.37 and 2.6 before 2.6.31-rc5, when running on 64-bit systems, does not clear certain padding bytes from a structure, which allows local users to obtain sensitive information from the kernel stack via the sigaltstack function.

The issue has been introduced in 03/02/2005. The weakness was released 08/18/2009 as Bug 515392 as not defined bug report (Bugzilla). The advisory is available at bugzilla.redhat.com. This vulnerability is handled as CVE-2009-2847. The exploitation is known to be easy. Local access is required to approach this attack. No form of authentication is required for exploitation. Technical details as well as a public exploit are known. This vulnerability is assigned to T1592 by the MITRE ATT&CK project.

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 1630 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 41973 (Fedora 10 : kernel-2.6.27.35-170.2.94.fc10 (2009-10165)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 155789 (Oracle Enterprise Linux Update for Kernel (ELSA-2009-1438)).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at Tenable (41973), SecurityFocus (BID 32676†), Secunia (SA36501†) and Vulnerability Center (SBV-23427†). Entries connected to this vulnerability are available at VDB-45344 and VDB-50089. If you want to get best quality of vulnerability data, you may have to visit VulDB.

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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Exploitinginfo

Class: Information disclosure
CWE: CWE-200 / CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

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

EPSS Score: 🔍
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Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 41973
Nessus Name: Fedora 10 : kernel-2.6.27.35-170.2.94.fc10 (2009-10165)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 64755
OpenVAS Name: Debian Security Advisory DSA 1872-1 (linux-2.6)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

03/02/2005 🔍
12/04/2008 +1373 days 🔍
08/18/2009 +256 days 🔍
08/18/2009 +0 days 🔍
08/18/2009 +0 days 🔍
08/18/2009 +0 days 🔍
09/08/2009 +21 days 🔍
10/05/2009 +27 days 🔍
03/18/2015 +1990 days 🔍
02/04/2025 +3611 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: Bug 515392
Status: Not defined
Confirmation: 🔍

CVE: CVE-2009-2847 (🔍)
GCVE (CVE): GCVE-0-2009-2847
GCVE (VulDB): GCVE-100-49466

OVAL: 🔍

SecurityFocus: 32676 - Linux Kernel 'net/atm/proc.c' Local Denial of Service Vulnerability
Secunia: 36501
Vulnerability Center: 23427 - Linux Kernel 2.4 -2.4.37 and 2.6- 2.6.31-rc4 do_sigaltstack Function Local Information Disclosure, Low

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

Entryinfo

Created: 03/18/2015 15:15
Updated: 02/04/2025 22:04
Changes: 03/18/2015 15:15 (67), 02/14/2017 16:25 (11), 08/20/2021 08:28 (5), 08/20/2021 08:31 (1), 12/08/2024 01:49 (19), 02/04/2025 22:04 (2)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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