Linux Kernel 2.6.32 sysenter Emulator race condition

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.4$0-$5k0.00

A vulnerability classified as critical has been found in Linux Kernel 2.6.32 (Operating System). This affects an unknown functionality of the component sysenter Emulator. The manipulation with an unknown input leads to a race condition vulnerability. CWE is classifying the issue as CWE-362. The product contains a code sequence that can run concurrently with other code, and the code sequence requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence that is operating concurrently. This is going to have an impact on confidentiality, integrity, and availability.

The issue has been introduced in 12/03/2009. The weakness was released 01/27/2015 by Nadav Amit (oss-sec). The advisory is shared at openwall.com. This vulnerability is uniquely identified as CVE-2015-0239 since 11/18/2014. The exploitability is told to be difficult. An attack has to be approached locally. No form of authentication is needed for exploitation. Neither technical details nor an exploit are publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 1881 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 81192 (Fedora 21 : kernel-3.18.5-201.fc21 (2015-1657)), 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 155284 (Oracle Enterprise Linux Security Update for Unbreakable Enterprise kernel (ELSA-2015-3053)).

Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.kernel.org.

The vulnerability is also documented in the databases at X-Force (100597) and Tenable (81192). Further details are available at bugzilla.redhat.com. Entries connected to this vulnerability are available at 69036 and 69190.

Productinfo

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License

CPE 2.3info

CPE 2.2info

CVSSv4info

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CVSSv3info

VulDB Meta Base Score: 7.4
VulDB Meta Temp Score: 6.4

VulDB Base Score: 7.4
VulDB Temp Score: 6.4
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VulDB Reliability: 🔍

CVSSv2info

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Exploitinginfo

Class: Race condition
CWE: CWE-362
CAPEC: 🔍
ATT&CK: 🔍

Local: Yes
Remote: No

Availability: 🔍
Status: Unproven

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Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 81192
Nessus Name: Fedora 21 : kernel-3.18.5-201.fc21 (2015-1657)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 703170
OpenVAS Name: Debian Security Advisory DSA 3170-1 (linux - security update)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: f3747379accba8e95d70cec0eae0582c8c182050

Timelineinfo

12/03/2009 🔍
11/18/2014 +1811 days 🔍
01/27/2015 +70 days 🔍
01/27/2015 +0 days 🔍
02/05/2015 +9 days 🔍
02/06/2015 +1 days 🔍
03/02/2015 +24 days 🔍
03/02/2015 +0 days 🔍
03/03/2015 +1 days 🔍
03/08/2022 +2562 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: USN-2513-1
Researcher: Nadav Amit
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2015-0239 (🔍)
OVAL: 🔍

X-Force: 100597 - Linux Kernel sysenter emulation privilege escalation, Medium Risk
Vulnerability Center: 48853 - Linux Kernel before 3.18.5 Local DoS and Security Bypass in Arch/x86/kvm/emulate.c, Medium
SecurityFocus: 72842 - Linux Kernel KVM CVE-2015-0239 Local Privilege Escalation Vulnerability

Misc.: 🔍
See also: 🔍

Entryinfo

Created: 02/05/2015 10:50
Updated: 03/08/2022 12:21
Changes: 02/05/2015 10:50 (72), 06/21/2017 11:04 (9), 03/08/2022 12:07 (5), 03/08/2022 12:14 (1), 03/08/2022 12:21 (1)
Complete: 🔍
Cache ID: 3:2EA:103

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