Loading vulnerability…
CVE-2021-35517 is an uncontrolled resource-allocation vulnerability in the TAR handling functionality of Apache Commons Compress. Insufficient validation of PAX header value sizes permits a specially crafted TAR archive to cause excessive memory allocation during parsing, potentially from a very small input. Apache Commons Compress 1.21 corrects the size-validation flaw.
Mallory correlates every CVE against your assets, your vendors, and active adversary campaigns. Know which vulnerabilities matter for you, not just which ones are loud.
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
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.
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 denial-of-service vulnerability in Apache Commons Compress's TAR handling that permits a specially crafted archive to cause excessive memory allocation and an out-of-memory condition.
Apache Commons Compress excessive-memory-allocation denial of service using a crafted TAR archive.
Denial-of-service issue in Apache Commons Compress involving excessive memory allocation while reading a specially crafted TAR archive.
A denial-of-service vulnerability in Apache Commons Compress's TAR package: crafted TAR/PAX headers can cause excessive memory allocation and out-of-memory conditions, affecting availability of services processing attacker-controlled archives.
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.