CVE-2014-1776 : Use-after-free vulnerability in Microsoft Internet Explorer 6 through 11 allows remote attackers to execute arbitrary co

Use-after-free vulnerability in Microsoft Internet Explorer 6 through 11 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via vectors related to the CMarkup::IsConnectedToPrimaryMarkup function, as exploited in the wild in April 2014. NOTE: this issue originally emphasized VGX.DLL, but Microsoft clarified that "VGX.DLL does not contain the vulnerable code leveraged in this exploit. Disabling VGX.DLL is an exploit-specific workaround that provides an immediate, effective workaround to help block known attacks."

Published 2014-04-27 10:55:03

Updated 2024-07-24 16:47:41

Source Microsoft Corporation

View at NVD, CVE.org

Vulnerability category: Memory CorruptionExecute codeDenial of service

CVE-2014-1776 is in the CISA Known Exploited Vulnerabilities Catalog

CISA vulnerability name:

Microsoft Internet Explorer Memory Corruption Vulnerability

CISA required action:

Apply updates per vendor instructions.

CISA description:

Microsoft Internet Explorer contains a memory corruption vulnerability that allows remote attackers to execute code in the context of the current user.

Notes:

https://learn.microsoft.com/en-us/security-updates/SecurityBulletins/2014/ms14-021?redirectedfrom=MSDN; https://nvd.nist.gov/vuln/detail/CVE-2014-1776

Added on 2022-01-28 Action due date 2022-07-28

Exploit prediction scoring system (EPSS) score for CVE-2014-1776

EPSS FAQ

95.99%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 100 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2014-1776

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source	First Seen
10.0	HIGH	AV:N/AC:L/Au:N/C:C/I:C/A:C	10.0	10.0	NIST
Access Vector: Network Access Complexity: Low Authentication: None Confidentiality Impact: Complete Integrity Impact: Complete Availability Impact: Complete
9.8	CRITICAL	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	3.9	5.9	NIST	2024-07-24
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: High Integrity: High Availability: High

CWE ids for CVE-2014-1776

CWE-416 Use After Free

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

Assigned by: nvd@nist.gov (Primary)

References for CVE-2014-1776

http://www.kb.cert.org/vuls/id/222929

VU#222929 - Microsoft Internet Explorer CMarkup use-after-free vulnerability
Mitigation;Third Party Advisory;US Government Resource
https://technet.microsoft.com/library/security/2963983

Microsoft Security Advisory 2963983 | Microsoft Docs
Mitigation;Patch;Vendor Advisory
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2014/ms14-021

Microsoft Security Bulletin MS14-021 - Critical | Microsoft Docs
Patch;Vendor Advisory
http://www.securityfocus.com/bid/67075

Microsoft Internet Explorer CVE-2014-1776 Remote Code Execution Vulnerability
Broken Link;Third Party Advisory;VDB Entry
http://securitytracker.com/id?1030154

Microsoft Internet Explorer Object Access Flaw Lets Remote Users Execute Arbitrary Code - SecurityTracker
Broken Link;Third Party Advisory;VDB Entry
http://secunia.com/advisories/57908

Sign in
Broken Link
http://www.osvdb.org/106311

404 Not Found
Broken Link
http://www.signalsec.com/cve-2014-1776-ie-0day-analysis/

CVE-2014-1776 (IE 0day) Analysis | SignalSEC Corp.
Exploit;Third Party Advisory
http://www.fireeye.com/blog/uncategorized/2014/04/new-zero-day-exploit-targeting-internet-explorer-versions-9-through-11-identified-in-targeted-attacks.html

New Zero-Day Exploit targeting Internet Explorer Versions 9 through 11 Identified in Targeted Attacks | FireEye Inc
Broken Link
http://blogs.technet.com/b/srd/archive/2014/04/30/protection-strategies-for-the-security-advisory-2963983-ie-0day.aspx

Protection strategies for the Security Advisory 2963983 IE 0day – Microsoft Security Response Center
Broken Link;Mitigation

Products affected by CVE-2014-1776