CVE-2017-20205 Detail
Received
This CVE record has recently been published to the CVE List and has been included within the NVD dataset. DescriptionValve'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 `szToken` can occur and overwrite the function return address. A remote attacker can trigger the vulnerable code by supplying a specially crafted ragdoll model which causes the oversized collisionpair rule to be parsed, resulting in remote code execution on affected clients or servers. Valve has addressed this issue in many of their Source games, but independently-developed games must manually apply patch. Metrics
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CVSS 4.0 Severity and Vector Strings:
CNA: VulnCheck
CVSS-B 9.2 CRITICAL
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
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Weakness Enumeration
Quick InfoCVE Dictionary Entry:CVE-2017-20205 NVD Published Date: 10/14/2025 NVD Last Modified: 10/14/2025 Source: VulnCheck |
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