GNU C Library up to 2.21 fnmatch_loop.c fnmatch out-of-bounds

CVSS Meta Temp Score
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CTI Interest Score
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5.4$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic has been found in GNU C Library up to 2.21. This affects the function fnmatch of the file fnmatch_loop.c. This manipulation causes out-of-bounds. This vulnerability appears as CVE-2015-8984. The attack may be initiated remotely. There is no available exploit. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability has been found in GNU C Library up to 2.21 (Software Library) and classified as problematic. Affected by this vulnerability is the function fnmatch of the file fnmatch_loop.c. The manipulation with an unknown input leads to a out-of-bounds vulnerability. The CWE definition for the vulnerability is CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect availability. The summary by CVE is:

The fnmatch function in the GNU C Library (aka glibc or libc6) before 2.22 might allow context-dependent attackers to cause a denial of service (application crash) via a malformed pattern, which triggers an out-of-bounds read.

The bug was discovered 02/28/2015. The weakness was presented 03/20/2017 by Kostya Serebryany (Website). The advisory is shared at sourceware.org. This vulnerability is known as CVE-2015-8984 since 02/14/2017. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details are known, but no exploit is available.

The vulnerability was handled as a non-public zero-day exploit for at least 751 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 97856 (Ubuntu 12.04 LTS / 14.04 LTS / 16.04 LTS : eglibc, glibc vulnerabilities (USN-3239-1)), 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 196734 (Ubuntu Security Notification for Eglibc, Glibc Vulnerabilities (USN-3239-1)).

Upgrading to version 2.22 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (97856) and SecurityFocus (BID 72789†). See VDB-90572, VDB-92506, VDB-98122 and VDB-98292 for similar entries. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.6
VulDB Meta Temp Score: 5.5

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.9
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Out-of-bounds
CWE: CWE-125 / CWE-119
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: 97856
Nessus Name: Ubuntu 12.04 LTS / 14.04 LTS / 16.04 LTS : eglibc, glibc vulnerabilities (USN-3239-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 841810
OpenVAS Name: Ubuntu Update for eglibc USN-3239-3
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: C Library 2.22

Timelineinfo

02/26/2015 🔍
02/28/2015 +2 days 🔍
02/14/2017 +717 days 🔍
03/20/2017 +34 days 🔍
03/20/2017 +0 days 🔍
03/20/2017 +0 days 🔍
03/21/2017 +1 days 🔍
03/21/2017 +0 days 🔍
09/10/2020 +1269 days 🔍

Sourcesinfo

Vendor: gnu.org

Advisory: sourceware.org
Researcher: Kostya Serebryany
Status: Not defined
Confirmation: 🔍

CVE: CVE-2015-8984 (🔍)
GCVE (CVE): GCVE-0-2015-8984
GCVE (VulDB): GCVE-100-98293
SecurityFocus: 72789 - GNU glibc 'fnmatch_loop.c' Local Buffer Overflow Vulnerability
OSVDB: - CVE-2015-8984 - GNU - C Library - Out-of-Bounds Read Issue

See also: 🔍

Entryinfo

Created: 03/21/2017 07:47
Updated: 09/10/2020 10:44
Changes: 03/21/2017 07:47 (80), 09/10/2020 10:44 (3)
Complete: 🔍
Cache ID: 216::103

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