SARA / Free Tools / CVE / CVE-2017-20205

CVE-2017-20205 — Valve's Source SDK (source-sdk-2013)'s ragdoll model parsing logic contains a st

Valve's Source SDK (source-sdk-2013)'s ragdoll model parsing logic contains a stack-based buffer overflow vulnerability.The tokenizer function `nexttoken` copies characters from an input string into a fixed-size stack buffer without performing bounds checks. When `Parse

CVSS
9.2 CRITICAL
EPSS
0.50% (top 34.20%)
CWE
CWE-121
Published
2025-10-15T01:23:24.216Z
Last modified
2025-11-21T14:19:29.897Z
CVSS vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

01What is this vulnerability?

Valve's Source SDK (source-sdk-2013)'s ragdoll model parsing logic contains a stack-based buffer overflow vulnerability.The tokenizer function `nexttoken` copies characters from an input string into a fixed-size stack buffer without performing bounds checks. When `ParseKeyValue` processes a collisionpair rule longer than the destination buffer (256 bytes), an overflow of the stack buffer…

02Affected products

VendorProductVersions
Valve SoftwareSource SDK (sourcesdk-2013) — source-sdk-2013

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

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07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

09References

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