Linux Kernel up to 4.8.2 gcc Stack Protector security/keys/proc.c proc_keys_show Memory memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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6.0$0-$5k0.00

Summaryinfo

A vulnerability labeled as problematic has been found in Linux Kernel up to 4.8.2. This affects the function proc_keys_show of the file security/keys/proc.c of the component gcc Stack Protector. Such manipulation leads to memory corruption (Memory). This vulnerability is uniquely identified as CVE-2016-7042. Local access is required to approach this attack. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Linux Kernel up to 4.8.2 (Operating System) and classified as problematic. Affected by this issue is the function proc_keys_show of the file security/keys/proc.c of the component gcc Stack Protector. The manipulation with an unknown input leads to a memory corruption vulnerability (Memory). Using CWE to declare the problem leads to CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. Impacted is availability. CVE summarizes:

The proc_keys_show function in security/keys/proc.c in the Linux kernel through 4.8.2, when the GNU Compiler Collection (gcc) stack protector is enabled, uses an incorrect buffer size for certain timeout data, which allows local users to cause a denial of service (stack memory corruption and panic) by reading the /proc/keys file.

The weakness was disclosed 10/16/2016 with Red Hat (Website). The advisory is shared for download at openwall.com. This vulnerability is handled as CVE-2016-7042 since 08/23/2016. The exploitation is known to be easy. The attack needs to be approached locally. A simple authentication is necessary for exploitation. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 94736 (Ubuntu 16.10 : linux vulnerability (USN-3129-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Ubuntu Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 175865 (Debian Security Update for linux (DSA 3696-1) (Dirty Cow)).

Upgrading eliminates this vulnerability. A possible mitigation has been published 4 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (94736) and SecurityFocus (BID 93544†). The entry VDB-94992 is pretty similar. Once again VulDB remains the best 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: 6.1

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

NVD Base Score: 6.2
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Name: Memory
Class: Memory corruption / Memory
CWE: CWE-119
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: 94736
Nessus Name: Ubuntu 16.10 : linux vulnerability (USN-3129-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 802886
OpenVAS Name: SuSE Update for Kernel openSUSE-SU-2016:3061-1 (Kernel)
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

08/23/2016 🔍
10/13/2016 +51 days 🔍
10/16/2016 +3 days 🔍
10/16/2016 +0 days 🔍
10/17/2016 +1 days 🔍
11/11/2016 +25 days 🔍
11/11/2016 +0 days 🔍
09/26/2022 +2145 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: USN-3129-1
Organization: Red Hat
Status: Not defined
Confirmation: 🔍

CVE: CVE-2016-7042 (🔍)
GCVE (CVE): GCVE-0-2016-7042
GCVE (VulDB): GCVE-100-92732

OVAL: 🔍

SecurityFocus: 93544 - Linux Kernel CVE-2016-7042 Local Denial of Service Vulnerability

See also: 🔍

Entryinfo

Created: 10/17/2016 10:26
Updated: 09/26/2022 10:52
Changes: 10/17/2016 10:26 (53), 05/11/2019 07:01 (23), 09/26/2022 10:41 (3), 09/26/2022 10:46 (11), 09/26/2022 10:52 (1)
Complete: 🔍
Cache ID: 216::103

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