FKIE_CVE-2020-6096

Vulnerability from fkie_nvd - Published: 2020-04-01 22:15 - Updated: 2024-11-21 05:35
Severity ?
8.1 (High) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
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
talos-cna@cisco.comhttps://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772%40%3Cdev.mina.apache.org%3E
talos-cna@cisco.comhttps://lists.debian.org/debian-lts-announce/2022/10/msg00021.htmlMailing List, Third Party Advisory
talos-cna@cisco.comhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SPYXTDOOB4PQGTYAMZAZNJIB3FF6YQXI/
talos-cna@cisco.comhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/URXOIA2LDUKHQXK4BE55BQBRI6ZZG3Y6/
talos-cna@cisco.comhttps://security.gentoo.org/glsa/202101-20Third Party Advisory
talos-cna@cisco.comhttps://sourceware.org/bugzilla/show_bug.cgi?id=25620Issue Tracking, Third Party Advisory
talos-cna@cisco.comhttps://www.talosintelligence.com/vulnerability_reports/TALOS-2020-1019Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772%40%3Cdev.mina.apache.org%3E
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2022/10/msg00021.htmlMailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SPYXTDOOB4PQGTYAMZAZNJIB3FF6YQXI/
af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/URXOIA2LDUKHQXK4BE55BQBRI6ZZG3Y6/
af854a3a-2127-422b-91ae-364da2661108https://security.gentoo.org/glsa/202101-20Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://sourceware.org/bugzilla/show_bug.cgi?id=25620Issue Tracking, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.talosintelligence.com/vulnerability_reports/TALOS-2020-1019Third Party Advisory
Impacted products
Vendor Product Version
gnu glibc *
fedoraproject fedora 31
fedoraproject fedora 32
debian debian_linux 10.0
To clipboard 

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      "value": "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 \u0027num\u0027 parameter results in a signed comparison vulnerability. If an attacker underflows the \u0027num\u0027 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."
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  "lastModified": "2024-11-21T05:35:05.313",
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Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.