Valve's Game Networking Sockets prior to version v1.2.0 improperly handles unreliable segments with negative offsets in function SNP_ReceiveUnreliableSegment(), leading to a Heap-Based Buffer Underflow and a free() of memory not from the heap, resulting in a memory corruption and probably even a remote code execution.
Published 2020-11-18 15:15:13
Updated 2022-10-21 19:37:45
View at NVD,   CVE.org
Vulnerability category: Memory CorruptionExecute code

Exploit prediction scoring system (EPSS) score for CVE-2020-6016

1.15%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 85 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2020-6016

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
10.0
HIGH AV:N/AC:L/Au:N/C:C/I:C/A:C
10.0
10.0
NIST
9.8
CRITICAL CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.9
5.9
NIST

CWE ids for CVE-2020-6016

  • The product calls free() on a pointer to memory that was not allocated using associated heap allocation functions such as malloc(), calloc(), or realloc().
    Assigned by: cve@checkpoint.com (Secondary)
  • The product writes data past the end, or before the beginning, of the intended buffer.
    Assigned by: nvd@nist.gov (Primary)

References for CVE-2020-6016

Products affected by CVE-2020-6016

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