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CVE-2009-1123 is a privilege escalation vulnerability in the Microsoft Windows kernel affecting Windows 2000 SP4, XP SP2/SP3, Server 2003 SP2, Vista Gold/SP1/SP2, and Server 2008 SP2. The vulnerability arises from improper validation of changes to unspecified kernel objects, allowing local users to gain elevated privileges via a crafted application. This vulnerability was exploited in the wild by the Fanny malware, which predates Stuxnet and was used as a zero-day for privilege escalation on multiple Windows versions. Fanny's exploit was more universal than Stuxnet's, supporting a broader range of Windows versions, and was used in targeted cyberespionage operations attributed to the Equation Group.
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What an attacker gets, and what they’ve been doing with it.
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No public exploit code observed for this vulnerability.
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No public activity observed for this vulnerability.
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Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
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Cross-references every affected SKU, including bundled OEM variants.
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