GNU C Library up to 2.24 on ARM EABI makecontext access control

CVSS Meta Temp Score
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CTI Interest Score
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7.3$0-$5k0.00

Summaryinfo

A vulnerability categorized as problematic has been discovered in GNU C Library up to 2.24 on ARM EABI. The impacted element is the function makecontext. Executing a manipulation can lead to access control. This vulnerability is handled as CVE-2016-6323. The attack can be executed remotely. There is not any exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability has been found in GNU C Library up to 2.24 on ARM EABI (Software Library) and classified as critical. This vulnerability affects the function makecontext. The manipulation with an unknown input leads to a access control vulnerability. The CWE definition for the vulnerability is CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. As an impact it is known to affect availability. CVE summarizes:

The makecontext function in the GNU C Library (aka glibc or libc6) before 2.25 creates execution contexts incompatible with the unwinder on ARM EABI (32-bit) platforms, which might allow context-dependent attackers to cause a denial of service (hang), as demonstrated by applications compiled using gccgo, related to backtrace generation.

The weakness was released 10/07/2016 with SuSE (Website). The advisory is available at lists.opensuse.org. This vulnerability was named CVE-2016-6323 since 07/26/2016. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1068 by the MITRE ATT&CK project.

The vulnerability scanner Nessus provides a plugin with the ID 94809 (Fedora 25 : glibc (2016-57cba655d5)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 196734 (Ubuntu Security Notification for Eglibc, Glibc Vulnerabilities (USN-3239-1)).

Upgrading to version 2.25 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 (94809) and SecurityFocus (BID 92532†). Entries connected to this vulnerability are available at VDB-90572, VDB-98122, VDB-98292 and VDB-98293. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.3

VulDB Base Score: 7.5
VulDB Temp Score: 7.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Access control
CWE: CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 94809
Nessus Name: Fedora 25 : glibc (2016-57cba655d5)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 800168
OpenVAS Name: Fedora Update for glibc FEDORA-2016-57cba655d5
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: C Library 2.25
Patch: 9e2ff6c9cc54c0b4402b8d49e4abe7000fde7617

Timelineinfo

07/26/2016 🔍
08/18/2016 +23 days 🔍
08/27/2016 +9 days 🔍
10/07/2016 +41 days 🔍
10/07/2016 +0 days 🔍
10/08/2016 +1 days 🔍
11/15/2016 +38 days 🔍
09/22/2022 +2137 days 🔍

Sourcesinfo

Vendor: gnu.org

Advisory: FEDORA-2016-57cba655d5
Organization: SuSE
Status: Not defined
Confirmation: 🔍

CVE: CVE-2016-6323 (🔍)
GCVE (CVE): GCVE-0-2016-6323
GCVE (VulDB): GCVE-100-92506
SecurityFocus: 92532 - GNU glibc CVE-2016-6323 Infinite Loop Denial of Service Vulnerability

See also: 🔍

Entryinfo

Created: 10/08/2016 19:00
Updated: 09/22/2022 16:46
Changes: 10/08/2016 19:00 (66), 05/04/2019 21:59 (14), 09/22/2022 16:46 (5)
Complete: 🔍
Cache ID: 216::103

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