CVE-2011-1889
Published: 16 June 2011
Summary
CVE-2011-1889 is a critical-severity Improper Restriction of Operations within the Bounds of a Memory Buffer (CWE-119) vulnerability in Microsoft Forefront Threat Management Gateway. Its CVSS base score is 9.8 (Critical).
Operationally, ranked in the top 0.5% of CVEs by exploit likelihood; CISA has added it to the Known Exploited Vulnerabilities catalog.
The strongest mitigations our analysis identified are NIST 800-53 SI-16 (Memory Protection) and SI-2 (Flaw Remediation).
Deeper analysis
The vulnerability is a memory corruption issue, tracked as CWE-119, in the NSPLookupServiceNext function within the client component of Microsoft Forefront Threat Management Gateway (TMG) 2010. It is assigned CVE-2011-1889 with a CVSS 3.1 base score of 9.8 and was publicly disclosed on 16 June 2011.
Remote attackers unauthenticated over the network can exploit the flaw by sending unspecified requests that trigger the memory corruption, resulting in arbitrary code execution on the affected system.
Microsoft addressed the issue in security bulletin MS11-040, with additional details available in advisories from Secunia, SecurityFocus, SecurityTracker, and IBM X-Force. No information on observed in-the-wild exploitation is provided in the source references.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2011-1887
Vulnerability details
The NSPLookupServiceNext function in the client in Microsoft Forefront Threat Management Gateway (TMG) 2010 allows remote attackers to execute arbitrary code via vectors involving unspecified requests, aka "TMG Firewall Client Memory Corruption Vulnerability."
- CWE(s)
- KEV Date Added
- 03 March 2022
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Directly implements memory protection mechanisms (ASLR, DEP, etc.) that block exploitation of the CWE-119 memory corruption in NSPLookupServiceNext.
Requires prompt application of the MS11-040 patch that eliminates the memory-corruption flaw in the TMG 2010 Firewall Client.
Malicious-code protection on endpoints can block or alert on the arbitrary code that results from successful exploitation of the client vulnerability.