CVEvulnerability

CVE-2020-6096

8.1 HIGH Published 2020-04-01 Modified 2026-10-14 Official page ↗
Status
Modified
Published
2020-04-01
Last modified
2026-10-14
Assigner
[email protected]
CVSS 3.1 ([email protected])
8.1 HIGH — CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 3.0 ([email protected])
8.1 HIGH — CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0 ([email protected])
6.8 MEDIUM — AV:N/AC:M/Au:N/C:P/I:P/A:P
Weaknesses
CWE-191, CWE-195, CWE-681

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.

Affected configurations

• gnu glibc (<= 2.31) • fedoraproject fedora 31 • fedoraproject fedora 32 • debian debian linux 10.0

Related

Weakness · CWE (3)

  • CWE-191 Integer Underflow (Wrap or Wraparound) weakness
  • CWE-195 Signed to Unsigned Conversion Error weakness
  • CWE-681 Incorrect Conversion between Numeric Types weakness

References