CVE-2018-8625
published 2018-12-12CVE-2018-8625: A remote code execution vulnerability exists in the way that the VBScript engine handles objects in memory, aka "Windows VBScript Engine Remote Code Execution…
PriorityP265high7.5CVSS 3.0
AVNACHPRNUIRSUCHIHAH
EXPLOIT
EPSS
43.76%
98.6th percentile
A remote code execution vulnerability exists in the way that the VBScript engine handles objects in memory, aka "Windows VBScript Engine Remote Code Execution Vulnerability." This affects Internet Explorer 9, Internet Explorer 11, Internet Explorer 10.
Affected
33 ranges· showing 25
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| microsoft | internet_explorer | — | — |
| microsoft | internet_explorer | — | — |
| microsoft | internet_explorer | — | — |
| microsoft | internet_explorer_10 | — | — |
| microsoft | internet_explorer_11 | — | — |
| microsoft | internet_explorer_11 | — | — |
| microsoft | internet_explorer_11 | — | — |
| microsoft | internet_explorer_11 | — | — |
| microsoft | internet_explorer_11 | — | — |
| microsoft | internet_explorer_11 | — | — |
| microsoft | internet_explorer_11 | — | — |
| microsoft | internet_explorer_11 | — | — |
| microsoft | internet_explorer_11 | — | — |
| microsoft | internet_explorer_11 | — | — |
| microsoft | internet_explorer_11 | — | — |
| microsoft | internet_explorer_11 | — | — |
| microsoft | internet_explorer_11 | — | — |
| microsoft | internet_explorer_11 | — | — |
| microsoft | internet_explorer_11 | — | — |
| microsoft | internet_explorer_11 | — | — |
| microsoft | internet_explorer_11 | — | — |
| microsoft | internet_explorer_11 | — | — |
| microsoft | internet_explorer_11 | — | — |
| microsoft | internet_explorer_11 | — | — |
| microsoft | internet_explorer_11 | — | — |
Detection & IOCsextracted from sources · hover to see the quote
- →Detect VBScript that defines a `Class_Terminate` sub which reassigns a shared outer-scope variable (e.g., `set a = c`) — this pattern is used to increment the reference counter of a target object inside the Erase callback. ↗
- →Monitor for exploitation of `RegExp` built-in objects via reference-counter overflow in VBScript; the PoC specifically targets RegExp because built-in objects lack overflow protection unlike custom VBScript classes. ↗
- →Flag Internet Explorer processes (iexplore.exe) rendering pages with VBScript that repeatedly creates and destroys arrays in a tight loop — the reference-counter overflow requires creating and destroying a new array per increment, which may manifest as sustained high CPU usage for ~2 hours. ↗
- ·The reference-counter overflow exploit requires sustained execution time (~2 hours on a typical CPU) unless a debugger is used to fast-forward the counter, meaning short-lived page visits are unlikely to complete exploitation. ↗
- ·Enabling page heap on iexplore.exe significantly slows the exploit, making it a viable mitigation/detection-delay measure in controlled environments. ↗
- ·Custom VBScript classes have built-in reference-counter overflow protection; the exploit therefore specifically targets built-in objects (e.g., RegExp) which lack this protection. ↗
CVSS provenance
nvdv3.07.5HIGHCVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
nvdv2.07.6HIGHAV:N/AC:H/Au:N/C:C/I:C/A:C
vendor_msrc6.4MEDIUM
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Microsoft
Windows VBScript Engine Remote Code Execution Vulnerability
vendor_msrc·2018-12-11·CVSS 6.4
CVE-2018-8625 [HIGH] Windows VBScript Engine Remote Code Execution Vulnerability
Windows VBScript Engine Remote Code Execution Vulnerability
Description: A remote code execution vulnerability exists in the way that the VBScript engine handles objects in memory. The vulnerability could corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user. An attacker who successfully exploited the vulnerability could gain the same user rights as the current user. If the current user is logged on with administrative user rights, an attacker who successfully exploited the vulnerability could take control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.
In a web-based attack scenario, an attacker could host a specially crafted website that is
GHSA
GHSA-qcp2-45fg-8994: A remote code execution vulnerability exists in the way that the VBScript engine handles objects in memory, aka "Windows VBScript Engine Remote Code E
ghsa_unreviewed·2022-05-13
CVE-2018-8625 [HIGH] CWE-416 GHSA-qcp2-45fg-8994: A remote code execution vulnerability exists in the way that the VBScript engine handles objects in memory, aka "Windows VBScript Engine Remote Code E
A remote code execution vulnerability exists in the way that the VBScript engine handles objects in memory, aka "Windows VBScript Engine Remote Code Execution Vulnerability." This affects Internet Explorer 9, Internet Explorer 11, Internet Explorer 10.
No detection rules found.
Trendmicro
Patch Tuesday Fixes Win32k, Windows DNS Server Flaws
blogs_trendmicro·2018-12-12·CVSS 7.8
CVE-2018-8611 [HIGH] Patch Tuesday Fixes Win32k, Windows DNS Server Flaws
Exploits & Vulnerabilities
## Patch Tuesday Fixes Win32k, Windows DNS Server Flaws
The just-released Patch Tuesday for December includes a fix for the actively exploited Win32k Elevation of Privilege Vulnerability (CVE-2018-8611).
By: Trend Micro Research Dec 12, 2018 Read time: ( words)
Save to Folio
The just-released Patch Tuesday for December includes a fix for the actively exploited Win32k Elevation of Privilege Vulnerability ( CVE-2018-8611 ). The flaw allows an attacker to exploit a bug in the Windows Kernel and run arbitrary code to install programs; view, change, or delete data; or create new accounts with full user rights. It is also pointed out as likely being used with other bugs in targeted attacks.
The patch release fixes another vulnerability that’s worth noting: CVE-20
Trendmicro
Patch Tuesday Fixes Win32k, Windows DNS Server Flaws
blogs_trendmicro·2018-12-12·CVSS 7.8
CVE-2018-8611 [HIGH] Patch Tuesday Fixes Win32k, Windows DNS Server Flaws
Ausnutzung von Schwachstellen
## Patch Tuesday Fixes Win32k, Windows DNS Server Flaws
The just-released Patch Tuesday for December includes a fix for the actively exploited Win32k Elevation of Privilege Vulnerability (CVE-2018-8611).
By: Trend Micro Research Dec 12, 2018 Read time: ( words)
Save to Folio
The just-released Patch Tuesday for December includes a fix for the actively exploited Win32k Elevation of Privilege Vulnerability ( CVE-2018-8611 ). The flaw allows an attacker to exploit a bug in the Windows Kernel and run arbitrary code to install programs; view, change, or delete data; or create new accounts with full user rights. It is also pointed out as likely being used with other bugs in targeted attacks.
The patch release fixes another vulnerability that’s worth noting: CVE
Trendmicro
Patch Tuesday Fixes Win32k, Windows DNS Server Flaws
blogs_trendmicro·2018-12-12·CVSS 7.8
CVE-2018-8611 [HIGH] Patch Tuesday Fixes Win32k, Windows DNS Server Flaws
Exploits & Vulnerabilities
# Patch Tuesday Fixes Win32k, Windows DNS Server Flaws
The just-released Patch Tuesday for December includes a fix for the actively exploited Win32k Elevation of Privilege Vulnerability (CVE-2018-8611).
By: Trend Micro Research
2018/12/12
Read time: ( words)
Save to Folio
The just-released Patch Tuesday for December includes a fix for the actively exploited Win32k Elevation of Privilege Vulnerability (CVE-2018-8611). The flaw allows an attacker to exploit a bug in the Windows Kernel and run arbitrary code to install programs; view, change, or delete data; or create new accounts with full user rights. It is also pointed out as likely being used with other bugs in targeted attacks.
The patch release fixes another vulnerability that’s worth noting: CVE-2018-8
Trendmicro
Patch Tuesday Fixes Win32k, Windows DNS Server Flaws
blogs_trendmicro·2018-12-12·CVSS 7.8
CVE-2018-8611 [HIGH] Patch Tuesday Fixes Win32k, Windows DNS Server Flaws
Exploits y vulnerabilidades
## Patch Tuesday Fixes Win32k, Windows DNS Server Flaws
The just-released Patch Tuesday for December includes a fix for the actively exploited Win32k Elevation of Privilege Vulnerability (CVE-2018-8611).
By: Trend Micro Research Dec 12, 2018 Read time: ( words)
Save to Folio
The just-released Patch Tuesday for December includes a fix for the actively exploited Win32k Elevation of Privilege Vulnerability ( CVE-2018-8611 ). The flaw allows an attacker to exploit a bug in the Windows Kernel and run arbitrary code to install programs; view, change, or delete data; or create new accounts with full user rights. It is also pointed out as likely being used with other bugs in targeted attacks.
The patch release fixes another vulnerability that’s worth noting: CVE-2
Trendmicro
Patch Tuesday Fixes Win32k, Windows DNS Server Flaws
blogs_trendmicro·2018-12-12·CVSS 7.8
CVE-2018-8611 [HIGH] Patch Tuesday Fixes Win32k, Windows DNS Server Flaws
Exploits & Vulnerabilities
## Patch Tuesday Fixes Win32k, Windows DNS Server Flaws
The just-released Patch Tuesday for December includes a fix for the actively exploited Win32k Elevation of Privilege Vulnerability (CVE-2018-8611).
By: Trend Micro Research 2018/12/12 Read time: ( words)
Save to Folio
The just-released Patch Tuesday for December includes a fix for the actively exploited Win32k Elevation of Privilege Vulnerability ( CVE-2018-8611 ). The flaw allows an attacker to exploit a bug in the Windows Kernel and run arbitrary code to install programs; view, change, or delete data; or create new accounts with full user rights. It is also pointed out as likely being used with other bugs in targeted attacks.
The patch release fixes another vulnerability that’s worth noting: CVE-2018
Trendmicro
Patch Tuesday Fixes Win32k, Windows DNS Server Flaws
blogs_trendmicro·2018-12-12·CVSS 7.8
CVE-2018-8611 [HIGH] Patch Tuesday Fixes Win32k, Windows DNS Server Flaws
Exploits & Vulnerabilities
## Patch Tuesday Fixes Win32k, Windows DNS Server Flaws
The just-released Patch Tuesday for December includes a fix for the actively exploited Win32k Elevation of Privilege Vulnerability (CVE-2018-8611).
By: Trend Micro Research Dec 12, 2018 Read time: ( words)
Save to Folio
The just-released Patch Tuesday for December includes a fix for the actively exploited Win32k Elevation of Privilege Vulnerability ( CVE-2018-8611 ). The flaw allows an attacker to exploit a bug in the Windows Kernel and run arbitrary code to install programmes; view, change, or delete data; or create new accounts with full user rights. It is also pointed out as likely being used with other bugs in targeted attacks.
The patch release fixes another vulnerability that’s worth noting: CVE-
Zscaler
Zscaler protects against 12 new vulnerabilities for Chakra Scripting Engine, Internet Explorer, Scripting Engine, Windows VBScript Engine, Windows & Microsoft PowerPoint | Zscaler
blogs_zscaler·CVSS 7.8
[HIGH] Zscaler protects against 12 new vulnerabilities for Chakra Scripting Engine, Internet Explorer, Scripting Engine, Windows VBScript Engine, Windows & Microsoft PowerPoint | Zscaler
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http://www.securityfocus.com/bid/106122https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8625https://www.exploit-db.com/exploits/46022/http://www.securityfocus.com/bid/106122https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8625https://www.exploit-db.com/exploits/46022/
2018-12-12
Published