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CVE-2016-2161 is a remotely triggerable denial-of-service vulnerability in Apache HTTP Server's mod_auth_digest module affecting versions 2.4.0 through 2.4.23. mod_auth_digest improperly handles memory-allocation failures during client-entry allocation when its shared-memory space is exhausted. Crafted input can cause an httpd child process to segfault; the affected instance may continue to crash while processing subsequent otherwise-valid requests.
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What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
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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.
12 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A remote denial-of-service flaw in Apache HTTP Server's mod_auth_digest memory-allocation-failure handling.
Apache HTTP Server mod_auth_digest denial-of-service flaw caused by improper handling of memory-allocation failures.
An Apache HTTP Server mod_auth_digest memory-allocation error-handling flaw that enables remote denial of service through repeated child-process crashes.
A remote denial-of-service vulnerability in Apache HTTP Server mod_auth_digest caused by improper handling of memory-allocation failures.
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.