Linux Kernel 3.x/4.x Advanced Union Filesystem mm/madvise.c race condition

CVSS Meta Temp Score
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CTI Interest Score
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3.8$0-$5k0.00

Summaryinfo

A vulnerability was found in Linux Kernel 3.x/4.x. It has been rated as problematic. This affects an unknown function of the file mm/madvise.c of the component Advanced Union Filesystem. This manipulation causes race condition. The identification of this vulnerability is CVE-2015-7312. There is no exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability classified as problematic was found in Linux Kernel 3.x/4.x (Operating System). Affected by this vulnerability is an unknown function of the file mm/madvise.c of the component Advanced Union Filesystem. The manipulation with an unknown input leads to a race condition vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect availability. The summary by CVE is:

Multiple race conditions in the Advanced Union Filesystem (aufs) aufs3-mmap.patch and aufs4-mmap.patch patches for the Linux kernel 3.x and 4.x allow local users to cause a denial of service (use-after-free and BUG) or possibly gain privileges via a (1) madvise or (2) msync system call, related to mm/madvise.c and mm/msync.c.

The weakness was shared 11/16/2015 (oss-sec). It is possible to read the advisory at openwall.com. This vulnerability is known as CVE-2015-7312 since 09/22/2015. Attacking locally is a requirement. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 86050 (Debian DSA-3364-1 : linux - security update), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 196276 (Ubuntu Security Notification for Linux Vulnerabilities (USN-2776-1)).

Upgrading eliminates this vulnerability. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (86050) and Vulnerability Center (SBV-54809†). The entries VDB-77323 and VDB-79223 are related to this item. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.0
VulDB Meta Temp Score: 3.8

VulDB Base Score: 4.0
VulDB Temp Score: 3.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Race condition
CWE: CWE-362
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: 86050
Nessus Name: Debian DSA-3364-1 : linux - security update
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 841810
OpenVAS Name: Ubuntu Update for linux USN-2779-1
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

09/21/2015 🔍
09/22/2015 +1 days 🔍
09/22/2015 +0 days 🔍
09/22/2015 +0 days 🔍
11/16/2015 +55 days 🔍
11/16/2015 +0 days 🔍
11/17/2015 +1 days 🔍
12/07/2015 +20 days 🔍
06/27/2022 +2394 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: USN-2777-1
Status: Not defined

CVE: CVE-2015-7312 (🔍)
GCVE (CVE): GCVE-0-2015-7312
GCVE (VulDB): GCVE-100-79219

OVAL: 🔍

Vulnerability Center: 54809 - Linux kernel Local DoS and Privilege Escalation due to Race Conditions in the Advanced Union Filesystem, Medium

See also: 🔍

Entryinfo

Created: 11/17/2015 09:17
Updated: 06/27/2022 13:47
Changes: 11/17/2015 09:17 (59), 05/11/2018 12:57 (13), 06/27/2022 13:47 (3)
Complete: 🔍
Cache ID: 216:498:103

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