VDB-102079 · CVE-2016-4973 · BID 92530

GCC for Stack Smashing Protection libssp memory corruption

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.5	$0-$5k	0.00

Summaryinfo

A vulnerability was found in GCC for Stack Smashing Protection. It has been classified as problematic. Affected is an unknown function of the component libssp. This manipulation causes memory corruption. The identification of this vulnerability is CVE-2016-4973. The attack can only be executed locally. There is no exploit available.

Detailsinfo

A vulnerability classified as problematic was found in GCC for Stack Smashing Protection (unknown version). Affected by this vulnerability is an unknown code block of the component libssp. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Binaries compiled against targets that use the libssp library in GCC for stack smashing protection (SSP) might allow local users to perform buffer overflow attacks by leveraging lack of the Object Size Checking feature.

The bug was discovered 08/17/2017. The weakness was shared 06/07/2017 by Yaakov Selkowitz with Red Hat (oss-sec). It is possible to read the advisory at openwall.com. This vulnerability is known as CVE-2016-4973 since 05/24/2016. The exploitation appears to be easy. Attacking locally is a requirement. The exploitation doesn't need any form of authentication. The technical details are unknown and an exploit is not publicly available.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at SecurityFocus (BID 92530†). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Name

GCC for Stack Smashing Protection

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.5

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

NVD Base Score: 7.8
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
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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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

05/24/2016 🔍
08/17/2016 +85 days 🔍
06/07/2017 +294 days 🔍
06/07/2017 +0 days 🔍
06/08/2017 +1 days 🔍
08/17/2017 +70 days 🔍
10/14/2019 +788 days 🔍

Sourcesinfo

Advisory: openwall.com
Researcher: Yaakov Selkowitz
Organization: Red Hat
Status: Not defined
Confirmation: 🔍

CVE: CVE-2016-4973 (🔍)
GCVE (CVE): GCVE-0-2016-4973
GCVE (VulDB): GCVE-100-102079
SecurityFocus: 92530 - GNU GCC CVE-2016-4973 Local Security Bypass Vulnerability

Entryinfo

Created: 06/08/2017 08:34
Updated: 10/14/2019 16:04
Changes: 06/08/2017 08:34 (60), 10/14/2019 16:04 (1)
Complete: 🔍
Cache ID: 216::103