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CVE-2020-17518 is a directory traversal vulnerability in Apache Flink's REST upload handling that was introduced in version 1.5.1. A REST handler accepts an uploaded file and uses attacker-controlled HTTP header data when determining the destination path, allowing a malicious request to write the uploaded file to an arbitrary location on the local filesystem. The write is constrained only by the filesystem permissions of the Flink process. Affected versions are Apache Flink 1.5.1 through 1.11.2.
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No valid public exploits. Mallory filtered out 1 candidate as fakes, detection scripts, or README-only repos.
All candidate exploits were filtered out by Mallory's validation.
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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 directory traversal vulnerability in Apache Flink's REST API that allows remote file writing to arbitrary locations on the local filesystem via a maliciously modified HTTP header.
A known Apache Flink security vulnerability mentioned as one of several recently known flaws that were fixed in Flink 1.12.2-rc2.
An Apache Flink vulnerability described as arbitrary read/write remote code execution, with proof-of-concept or Metasploit exploit code released.
A specific Apache Flink arbitrary read/write remote code execution vulnerability for which proof-of-concept or Metasploit exploit code was released.
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.