Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Gnu | Glibc | <= 2.31 |
| Fedoraproject | Fedora | 31 |
| Debian | Debian Linux | 10.0 |
Related Weaknesses (CWE)
References
- https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430
- https://lists.debian.org/debian-lts-announce/2022/10/msg00021.htmlMailing ListThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://security.gentoo.org/glsa/202101-20Third Party Advisory
- https://sourceware.org/bugzilla/show_bug.cgi?id=25620Issue TrackingThird Party Advisory
- https://www.talosintelligence.com/vulnerability_reports/TALOS-2020-1019Third Party Advisory
- https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430
- https://lists.debian.org/debian-lts-announce/2022/10/msg00021.htmlMailing ListThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://security.gentoo.org/glsa/202101-20Third Party Advisory
- https://sourceware.org/bugzilla/show_bug.cgi?id=25620Issue TrackingThird Party Advisory
- https://www.talosintelligence.com/vulnerability_reports/TALOS-2020-1019Third Party Advisory
FAQ
What is CVE-2020-6096?
CVE-2020-6096 is a vulnerability with a CVSS score of 8.1 (HIGH). 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 ...
How severe is CVE-2020-6096?
CVE-2020-6096 has been rated HIGH with a CVSS base score of 8.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2020-6096?
Check the references section above for vendor advisories and patch information. Affected products include: Gnu Glibc, Fedoraproject Fedora, Debian Debian Linux.