What is CVE-2023-35855?

CVE-2023-35855 is a critical-severity vulnerability in Valvesoftware Counter-Strike, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 9.8/10. Published 2023-06-19.

How severe is CVE-2023-35855?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2023-35855 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in Valvesoftware Counter-Strike

CVE-2023-35855

A buffer overflow in Counter-Strike through 8684 allows a game server to execute arbitrary code on a remote client's machine by modifying the lservercfgfile console variable.

Vulnerability class: Buffer Overflow

EPSS: 0.011 (61.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Valvesoftware Counter-strike
N/a — versions n/a

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

Public proof-of-concept exploits

References

cve@mitre.org (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2023-35855?: CVE-2023-35855 is a critical-severity vulnerability in Valvesoftware Counter-Strike, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 9.8/10. Published 2023-06-19.
How severe is CVE-2023-35855?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2023-35855 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.