Linux Kernel 2.6.18 generic_file_splice_write access control

CVSS Meta Temp Score
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CTI Interest Score
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5.9$0-$5k0.00

Summaryinfo

A vulnerability was found in Linux Kernel 2.6.18. It has been rated as problematic. This impacts the function generic_file_splice_write. This manipulation causes access control. This vulnerability is tracked as CVE-2008-3833. No exploit exists. Upgrading the affected component is advised.

Detailsinfo

A vulnerability classified as problematic was found in Linux Kernel 2.6.18 (Operating System). Affected by this vulnerability is the function generic_file_splice_write. 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. The summary by CVE is:

The generic_file_splice_write function in fs/splice.c in the Linux kernel before 2.6.19 does not properly strip setuid and setgid bits when there is a write to a file, which allows local users to gain the privileges of a different group, and obtain sensitive information or possibly have unspecified other impact, by splicing into an inode in order to create an executable file in a setgid directory, a different vulnerability than CVE-2008-4210.

The bug was discovered 09/29/2008. The weakness was disclosed 10/03/2008 as Bug 464450 as not defined bug report (Bugzilla). The advisory is shared at bugzilla.redhat.com. This vulnerability is known as CVE-2008-3833 since 08/27/2008. The exploitation appears to be easy. An attack has to be approached locally. The exploitation doesn't need any form of authentication. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1068 for this issue.

The vulnerability was handled as a non-public zero-day exploit for at least 744 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 43713 (CentOS 5 : kernel (CESA-2008:0957)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CentOS Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 117213 (CentOS Security Update for kernel (CESA-2008:0957)).

Upgrading eliminates this vulnerability. A possible mitigation has been published 2 months after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (46451), Tenable (43713), SecurityFocus (BID 31567†), OSVDB (48879†) and Secunia (SA32485†). The entries VDB-34127, VDB-39622, VDB-43717 and VDB-43007 are pretty similar. If you want to get the best quality for vulnerability data then you always have to consider 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: 5.9

VulDB Base Score: 6.2
VulDB Temp Score: 5.9
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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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: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 43713
Nessus Name: CentOS 5 : kernel (CESA-2008:0957)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 61775
OpenVAS Name: Debian Security Advisory DSA 1653-1 (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: 🔍

Timelineinfo

09/20/2006 🔍
08/27/2008 +707 days 🔍
09/29/2008 +33 days 🔍
09/29/2008 +0 days 🔍
10/03/2008 +4 days 🔍
10/03/2008 +0 days 🔍
10/03/2008 +0 days 🔍
10/19/2008 +16 days 🔍
11/04/2008 +16 days 🔍
11/12/2008 +8 days 🔍
01/06/2010 +420 days 🔍
03/17/2015 +1896 days 🔍
08/18/2019 +1615 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: Bug 464450
Status: Not defined
Confirmation: 🔍

CVE: CVE-2008-3833 (🔍)
GCVE (CVE): GCVE-0-2008-3833
GCVE (VulDB): GCVE-100-44317

OVAL: 🔍

X-Force: 46451
SecurityFocus: 31567 - Linux Kernel 'generic_file_splice_write()' Local Privilege Escalation Vulnerability
Secunia: 32485
OSVDB: 48879 - CVE-2008-3833 - Linux - Kernel - Privilege Escalation Issue
Vulnerability Center: 19744 - Linux Kernel < 2.6.19 generic_file_splice_write Function Local Privilege Escalation Vulnerability, High

See also: 🔍

Entryinfo

Created: 03/17/2015 16:11
Updated: 08/18/2019 18:25
Changes: 03/17/2015 16:11 (82), 08/18/2019 18:25 (5)
Complete: 🔍
Cache ID: 216::103

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