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.
References
| Link | 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 |
| https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/URXOIA2LDUKHQXK4BE55BQBRI6ZZG3Y6/ | Mailing List Third Party Advisory |
| https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/SPYXTDOOB4PQGTYAMZAZNJIB3FF6YQXI/ | Mailing List Third Party Advisory |
| https://security.gentoo.org/glsa/202101-20 | Third Party Advisory |
| https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772@%3Cdev.mina.apache.org%3E | Mailing List Third Party Advisory |
| https://lists.debian.org/debian-lts-announce/2022/10/msg00021.html | Mailing List Third Party Advisory |
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Information
Published : 2020-04-01 15:15
Updated : 2022-11-21 11:39
NVD link : CVE-2020-6096
Mitre link : CVE-2020-6096
JSON object : View
CWE
CWE-195
Signed to Unsigned Conversion Error
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Products Affected
debian
- debian_linux
fedoraproject
- fedora
gnu
- glibc