National Vulnerability Database

National Vulnerability Database

National Vulnerability
Database

CVE-2020-6096 Detail

Current Description

An exploitable signed comparison vulnerability exists in the ARMv7 memcpy() implementation of GNU glibc 2.30.9000. Calling memcpy() (on ARMv7 targets that utilize the GNU glibc implementation) with a negative value for the 'num' parameter results in a signed comparison vulnerability. If an attacker underflows the 'num' parameter to memcpy(), this vulnerability could lead to undefined behavior such as writing to out-of-bounds memory and potentially remote code execution. Furthermore, this memcpy() implementation allows for program execution to continue in scenarios where a segmentation fault or crash should have occurred. The dangers occur in that subsequent execution and iterations of this code will be executed with this corrupted data.

Source:  MITRE
View Analysis Description

Severity



CVSS 3.x Severity and Metrics:

NIST CVSS score
NIST: NVD
Base Score: 8.1 HIGH
Vector:  CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

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Hyperlink Resource
https://sourceware.org/bugzilla/show_bug.cgi?id=25620 Issue Tracking Third Party Advisory
https://www.talosintelligence.com/vulnerability_reports/TALOS-2020-1019 Third Party Advisory

Weakness Enumeration

CWE-ID CWE Name Source
CWE-191 Integer Underflow (Wrap or Wraparound) NIST  

Known Affected Software Configurations Switch to CPE 2.2

Configuration 1 ( hide )
 cpe:2.3:a:gnu:glibc:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
Up to (including)
2.31


Change History

4 change records found - show changes

Quick Info

CVE Dictionary Entry:
CVE-2020-6096
NVD Published Date:
04/01/2020
NVD Last Modified:
05/22/2020