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CVE-2020-6096 Detail

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.


Severity



CVSS 4.0 Severity and Metrics:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.


NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: NVD Analysts have not published a CVSS score for this CVE at this time. NVD Analysts use publicly available information at the time of analysis to associate CVSS vector strings.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772%40%3Cdev.mina.apache.org%3E
https://lists.debian.org/debian-lts-announce/2022/10/msg00021.html Mailing List  Third Party Advisory 
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SPYXTDOOB4PQGTYAMZAZNJIB3FF6YQXI/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/URXOIA2LDUKHQXK4BE55BQBRI6ZZG3Y6/
https://security.gentoo.org/glsa/202101-20 Third Party Advisory 
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-681 Incorrect Conversion between Numeric Types cwe source acceptance level NIST  
CWE-191 Integer Underflow (Wrap or Wraparound) cwe source acceptance level NIST  
CWE-195 Signed to Unsigned Conversion Error Provider acceptance level Talos  

Known Affected Software Configurations Switch to CPE 2.2

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Change History

16 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2020-6096
NVD Published Date:
04/01/2020
NVD Last Modified:
11/06/2023
Source:
Talos