CVE-2011-2012

Forefront Unified Access Gateway vulnerability

CVSS

5.0

EPSS

16.6%

EPSS pct

97th

Exploited

No known

Microsoft Forefront Unified Access Gateway (UAG) 2010 Gold, Update 1, Update 2, and SP1 does not properly validate session cookies, which allows remote attackers to cause a denial of service (IIS outage) via unspecified network traffic, aka "Null Session Cookie Crash."

Affected vendor

Microsoft

Affected product

Forefront Unified Access Gateway

CVSS vector

AV:N/AC:L/Au:N/C:N/I:N/A:P

Weakness type (CWE)

CWE-20 — Improper Input Validation

Published

2011-10-12

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no authentication. Successful exploitation leads to partial impact to availability.

Its EPSS score of 16.6% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it above 97% of all scored CVEs.

Check your external exposure to CVE-2011-2012

Confirm whether Microsoft Forefront Unified Access Gateway is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2011-2012.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2011-2012

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2011-2012 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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