Linux Kernel 2.6.17 denial of service

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

Summaryinfo

A vulnerability identified as problematic has been detected in Linux Kernel 2.6.17. Impacted is an unknown function. The manipulation leads to denial of service. This vulnerability is uniquely identified as CVE-2006-5755. No exploit exists. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel 2.6.17 (Operating System). It has been rated as problematic. This issue affects some unknown functionality. The manipulation with an unknown input leads to a denial of service vulnerability. Using CWE to declare the problem leads to CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. Impacted is availability. The summary by CVE is:

Linux kernel before 2.6.18, when running on x86_64 systems, does not properly save or restore EFLAGS during a context switch, which allows local users to cause a denial of service (crash) by causing SYSENTER to set an NT flag, which can trigger a crash on the IRET of the next task.

The bug was discovered 06/15/2007. The weakness was disclosed 12/31/2006 (Website). It is possible to read the advisory at redhat.com. The identification of this vulnerability is CVE-2006-5755 since 11/06/2006. The exploitation is known to be easy. Attacking locally is a requirement. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 197 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 67758 (Oracle Linux 5 : kernel (ELSA-2008-0957)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Oracle Linux 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 to version 2.6.18 eliminates this vulnerability. A possible mitigation has been published 3 years after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (46451), Tenable (67758), SecurityFocus (BID 26060†), OSVDB (31464†) and Secunia (SA24098†). The entries VDB-2663, VDB-39622, VDB-43717 and VDB-43007 are pretty similar. 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: 5.9

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

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Denial of service
CWE: CWE-404
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: 67758
Nessus Name: Oracle Linux 5 : kernel (ELSA-2008-0957)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍

OpenVAS ID: 58641
OpenVAS Name: Debian Security Advisory DSA 1381-1 (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 2.6.18

Timelineinfo

06/17/2006 🔍
09/26/2006 +101 days 🔍
11/06/2006 +41 days 🔍
12/31/2006 +55 days 🔍
12/31/2006 +0 days 🔍
12/31/2006 +0 days 🔍
02/12/2007 +43 days 🔍
06/15/2007 +123 days 🔍
09/10/2007 +87 days 🔍
11/06/2008 +423 days 🔍
07/12/2013 +1709 days 🔍
03/12/2015 +608 days 🔍
07/25/2019 +1596 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: redhat.com
Status: Not defined
Confirmation: 🔍

CVE: CVE-2006-5755 (🔍)
GCVE (CVE): GCVE-0-2006-5755
GCVE (VulDB): GCVE-100-34127

OVAL: 🔍

X-Force: 46451
SecurityFocus: 26060 - Linux Kernel EFLAGS NT Local Denial of Service Vulnerability
Secunia: 24098
OSVDB: 31464 - Linux - Kernel - EFLAGS NT - Local Denial of Service Issue
Vulnerability Center: 16017 - Linux Kernel EFLAGS Restore Vulnerability Allows Local Users to Cause DoS, Low

See also: 🔍

Entryinfo

Created: 03/12/2015 22:21
Updated: 07/25/2019 16:09
Changes: 03/12/2015 22:21 (82), 07/25/2019 16:09 (4)
Complete: 🔍
Cache ID: 216:A01:103

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