Zero-day vulnerability in Windows

Buffer overflow
CVE-2018-8120

The vulnerability was reported by ESET in March 2018. The attackers used this vulnerability along with double free error in Adobe Acrobat CVE-2018-4990.

Known malware:

Win32/Exploit.CVE-2018-8120.A trojan (ESET)

Vulnerability details

Advisory: SB2018050813 - Privilege escalation in Microsoft Windows win32k.sys driver

Vulnerable component: Windows

CVE-ID: CVE-2018-8120

CVSSv3 score: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C

CWE-ID: CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer

Description:

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to boundary error in win32k.sys driver. A local user can execute arbitrary code with SYSTEM privileges.

Note: this vulnerability is being actively exploited in limited targeted attacks.

Latest references in media:

- Hackers attacked the famous Russian media for the second time [2018-08-09 09:31:00]

- IT threat evolution Q2 2018. Statistics [2018-08-06 12:00:56]

- Digital Enemy of the Corporate Networks [2018-08-01 18:01:11]

- Fileless PowerGhost cryptocurrency miner leverages EternalBlue exploit to spread [2018-07-31 07:40:09]

- Stealthy Crypto-Miner Has Worm-Like Spreading Mechanism [2018-07-30 17:00:10]

- PowerGhost Malware Remotely Attack Corporate Networks Servers & Workstations [2018-07-30 06:00:52]

- This new cryptomining malware targets business PCs and servers | ZDNet [2018-07-27 14:50:09]

- A mining multitool [2018-07-26 12:00:49]

- ShadowTalk Update – 06.25.2018 [2018-07-25 16:25:00]

- Microsoft revealed that 2 Zero-Days found in March were part of a cyber weapon in an early development stage [2018-07-03 07:50:09]

- Two 'unarmed' zero-day exploits—one for Adobe Acrobat and Reader, and the other targeting Microsoft Windows—were found on VirusTotal site. [2018-07-02 20:30:04]

- Taking apart a double zero-day sample discovered in joint hunt with ESET [2018-07-02 17:01:33]

- Windows 'Double Kill' Attack Code Found in RIG Exploit Kit [2018-05-30 21:30:09]

- Patch Tuesday, May 2018 [2018-05-29 03:59:21]

- Patch Tuesday, May 2018 [2018-05-20 07:26:36]

- Signal bugs, car hack antics, the Adobe flaw you may have missed, and much more [2018-05-19 10:42:32]

- Malicious PDF Leads to Discovery of Adobe Reader, Windows Zero-Days [2018-05-16 14:43:31]

- Mysterious hackers ingenuously reveal two Zero-Days to security community [2018-05-16 13:56:15]

- Shadowy Hackers Accidentally Reveal Two Zero-Days to Security Researchers [2018-05-15 23:30:09]

- Patch now! Microsoft and Adobe release critical security updates [2018-05-09 18:30:02]

- Windows critical flaw: This security bug is under attack right now, says Microsoft | ZDNet [2018-05-09 15:30:08]

- Microsoft Patches Two Zero-Day Flaws this Month [2018-05-09 12:41:56]

- Microsoft Patch Tuesday for May Includes Updates for Actively-Exploited Vulnerabilities [2018-05-09 11:00:33]

- May 2018 Patch Tuesday: Microsoft fixes 2 zero-day flaws reportedly exploited by APT group [2018-05-09 10:16:42]

- Patch Tuesday, May 2018 [2018-05-09 09:13:35]

- Microsoft's May 2018 Patch Tuesday update fixes a total 21 critical vulnerabilities, including two flaws that have been under active attack since last month. [2018-05-09 08:30:07]

- It's 2018, and a webpage can still pwn your Windows PC – and apps can escape Hyper-V [2018-05-09 03:51:18]

- Microsoft's Patch Tuesday Fixes Two CVEs Under Active Attack [2018-05-08 23:20:01]

- May Patch Tuesday Fixes Two Bugs Under Active Attack [2018-05-08 22:55:21]

- Microsoft Patches Two Windows Zero-Day Vulnerabilities [2018-05-08 22:04:29]

- Microsoft May 2018 Patch Tuesday Fixes 67 Security Issues, Including IE Zero-Day [2018-05-08 20:44:45]

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