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CVE-2016-0034 is a memory-corruption vulnerability in Microsoft Silverlight 5 before version 5.1.41212.0. The BinaryReader class initially validates an index, but its unsafe InternalReadChars method subsequently trusts results returned by a user-supplied decoder's GetChars implementation. An attacker-controlled return value can produce an invalid negative offset in a subsequent iteration, permitting memory modification and object-header corruption. Exploitation through a crafted website can result in arbitrary code execution or denial of service. The vulnerability was exploited as a zero-day and subsequently used in exploit kits and watering-hole campaigns.
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What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
7 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Microsoft Silverlight memory corruption vulnerability used here via a repackaged exploit delivered through watering-hole infrastructure.
A Microsoft Silverlight memory-corruption vulnerability in the BinaryReader class. A user-defined decoder can return an incorrect value that corrupts an index used in unsafe pointer operations, allowing memory modification. Researchers detected an exploit affecting a user on November 25, 2015. Attribution to Vitaliy Toropov and a connection to Hacking Team remain unconfirmed.
A Microsoft Silverlight exploit used by Lazarus in watering-hole attacks against Polish banks.
A Microsoft Silverlight vulnerability observed in exploit delivery from the compromised watering-hole infrastructure.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.