GCC for Stack Smashing Protection libssp memory corruption

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A vulnerability classified as problematic was found in GCC for Stack Smashing Protection (affected version unknown). 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. 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).

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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: 🔍

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VulDB Base Score: 🔍
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Exploitinginfoedit

Class: Memory corruption
CWE: CWE-119
ATT&CK: Unknown

Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

Price Prediction: 🔍
Current Price Estimation: 🔍

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Countermeasuresinfoedit

Recommended: no mitigation known
Status: 🔍

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Timelineinfoedit

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 🔍

Sourcesinfoedit

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

CVE: CVE-2016-4973 (🔍)
SecurityFocus: 92530 - GNU GCC CVE-2016-4973 Local Security Bypass Vulnerability

Entryinfoedit

Created: 06/08/2017 08:34 AM
Updated: 10/14/2019 04:04 PM
Changes: (1) vulnerability_discoverydate
Complete: 🔍

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