Remote code execution in Valve Steam
| Risk | High |
| Patch available | NO |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2021-30481 |
| CWE-ID | CWE-119 |
| Exploitation vector | Network |
| Public exploit | Public exploit code for vulnerability #1 is available. |
| Vulnerable software Subscribe |
Steam Client/Desktop applications / Other client software |
| Vendor | Valve Software |
Security Bulletin
This security bulletin contains one high risk vulnerability.
1) Buffer overflow
EUVDB-ID: #VU52200
Risk: High
CVSSv3.1: 8.3 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:P/RL:U/RC:C]
CVE-ID: CVE-2021-30481
CWE-ID:
CWE-119 - Memory corruption
Exploit availability: Yes
DescriptionThe vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error when processing Steam invites. A remote attacker can send a specially crafted invite, trigger a buffer overflow after the user clicks on the invite, and execute arbitrary code on the system.
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.
Vulnerable software versionsSteam: All versions
External linkshttp://news.ycombinator.com/item?id=26762170
http://twitter.com/floesen_/status/1337107178096881666
http://twitter.com/the_secret_club/status/1380868759129296900
http://www.youtube.com/watch?v=rNQn--9xR1Q
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. However, proof of concept for this vulnerability is available.
