Input validation error in Steam



Published: 2015-05-20 | Updated: 2020-08-09
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2015-4016
CWE-ID CWE-20
Exploitation vector Network
Public exploit N/A
Vulnerable software
Subscribe 		Steam
Client/Desktop applications / Other client software

Vendor Valve Software

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Input validation error

EUVDB-ID: #VU40772

Risk: Medium

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2015-4016

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to perform service disruption.

The client detection protocol in Valve Steam allows remote attackers to cause a denial of service (process crash) via a crafted response to a broadcast packet.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Steam: All versions

External links

http://store.steampowered.com/news/16801/
http://www.securityfocus.com/bid/74735
http://www.zerodayinitiative.com/advisories/ZDI-15-233/


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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