CVE-2019-17180

Valve Steam Client before 2019-09-12 allows placing or appending partially controlled filesystem content, as demonstrated by file modifications on Windows in the context of NT AUTHORITY\SYSTEM. This could lead to denial of service, elevation of privilege, or unspecified other impact...

CVE-2019-17180

Summary: CVE-2019-17180 affects Valve Steam Client prior to 2019-09-12. The vulnerability allows placing or appending partially controlled filesystem content, demonstrated by file modifications on Windows under NT AUTHORITY\SYSTEM. This could lead to denial of service, elevation of privilege, or ...

Valve: SQL injection in /errors/viewbuild/

A SQL injection vulnerability was discovered in a partner-facing tool that allowed queries against a legacy backing store...

A week in security (August 19 – 25)

Last week on Malwarebytes Labs, we reported on the presence of Magecart on a type of poker software; outlined how the Key Negotiation of Bluetooth KNOB attack works; followed the money on a Bitcoin sextortion campaign; looked back at DEF CON 27; and reported on continuing ransomware attacks on...

News Wrap: Steam Zero Day Disclosure Drama, Unix Utility Backdoor

Why did Valve-owner Steam say it made a “mistake” turning a researcher away from its bug bounty program? Who was behind a backdoor that was purposefully introduced into a utility utilized by Unix and Linux servers? And why is Facebook coming under fire for its “Clear History” feature? Threatpost...

Researcher Discloses Second Steam Zero-Day After Valve Bug Bounty Ban

A researcher has disclosed a zero-day privilege-escalation vulnerability for the Steam gaming client after he said he was barred from the bug bounty program of Steam’s owner, Valve. The vulnerability is the second zero-day privilege-escalation vulnerability that has been released by independent...

CVE-2019-15315

Valve Steam Client for Windows through 2019-08-16 allows privilege escalation to NT AUTHORITY\SYSTEM because local users can replace the current versions of SteamService.exe and SteamService.dll with older versions that lack the CVE-2019-14743 patch...

CVE-2019-15316

Valve Steam Client for Windows through 2019-08-20 has weak folder permissions, leading to privilege escalation to NT AUTHORITY\SYSTEM via crafted use of CreateMountPoint.exe and SetOpLock.exe to leverage a TOCTOU race condition...

CVE-2019-15315

Valve Steam Client for Windows through 2019-08-16 allows privilege escalation to NT AUTHORITY\SYSTEM because local users can replace the current versions of SteamService.exe and SteamService.dll with older versions that lack the CVE-2019-14743 patch...

Privilege escalation

Valve Steam Client for Windows through 2019-08-16 allows privilege escalation to NT AUTHORITY\SYSTEM because local users can replace the current versions of SteamService.exe and SteamService.dll with older versions that lack the CVE-2019-14743 patch...

Race condition

Valve Steam Client for Windows through 2019-08-20 has weak folder permissions, leading to privilege escalation to NT AUTHORITY\SYSTEM via crafted use of CreateMountPoint.exe and SetOpLock.exe to leverage a TOCTOU race condition...

CVE-2019-15316

Affected product: Valve Steam Client for Windows (through 2019-08-20). The vulnerability is caused by weak folder permissions that enable a TOCTOU race condition, exploited via crafted use of CreateMountPoint.exe and SetOpLock.exe to escalate privileges to NT AUTHORITY\SYSTEM. Connected documents...

CVE-2019-15316

Valve Steam Client for Windows through 2019-08-20 has weak folder permissions, leading to privilege escalation to NT AUTHORITY\SYSTEM via crafted use of CreateMountPoint.exe and SetOpLock.exe to leverage a TOCTOU race condition...

CVE-2019-15315

The CVE-2019-15315 entry concerns Valve Steam Client for Windows (up to 2019-08-16). Local attackers can achieve NT AUTHORITY\SYSTEM privilege escalation by replacing the SteamService.exe and SteamService.dll binaries with older, unpatched versions that bypassed CVE-2019-14743. Root cause is abus...

CVE-2019-15315

Valve Steam Client for Windows through 2019-08-16 allows privilege escalation to NT AUTHORITY\SYSTEM because local users can replace the current versions of SteamService.exe and SteamService.dll with older versions that lack the CVE-2019-14743 patch...

Valve: [GoldSrc] Remote Code Execution using malicious WAD list in BSP file

Summary TEXInitFromWad function calls COMFileBase to get file name from a path into a buffer on the stack. Since COMFileBase does not have boundary checks and the buffer is small, long WAD file name can trigger a Stack Buffer Overflow, leading to arbitrary code execution. Steps to reproduce...

Valve: /applications/dpc_(get|post) provide full access to api.steampowered.com with the Dota2 API key

The vulnerability allowed attackers to call arbitrary API methods using an API key with elevated privileges for Dota2...

Steam 0 day vulnerability affects 1 billion users-vulnerability warning-the black bar safety net

! The Steam platform is currently the most popular game platform steam has over 1 million registered users, with millions of users simultaneously participate in the game. Researchers in the Steam games Windows the client found a 0-day privilege escalation vulnerability, exploit the vulnerability...

CVE-2019-14743

In Valve Steam Client for Windows through 2019-08-07, HKLM\SOFTWARE\Wow6432Node\Valve\Steam has explicit "Full control" for the Users group, which allows local users to gain NT AUTHORITY\SYSTEM access...

Design/Logic Flaw

In Valve Steam Client for Windows through 2019-08-07, HKLM\SOFTWARE\Wow6432Node\Valve\Steam has explicit "Full control" for the Users group, which allows local users to gain NT AUTHORITY\SYSTEM access...