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CVE-2019-0197 is a denial-of-service vulnerability in Apache HTTP Server mod_http2 affecting versions 2.4.34 through 2.4.38. Under affected configurations, an HTTP/1.1-to-HTTP/2 Upgrade request that is not the first request on a connection can misconfigure the server and cause it to crash. The affected configurations are HTTP/2 enabled for an HTTP virtual host, or H2Upgrade enabled for HTTP/2 on an HTTPS host.
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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.
15 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A vulnerability tracked as CVE-2019-0197 affecting systems covered by the Unity Linux advisory/plugin; the supplied content provides no technical flaw description.
A possible crash flaw in Apache HTTP Server mod_http2 during a late protocol upgrade.
A vulnerability in Apache HTTP Server mod_http2 that can cause a crash during a late upgrade.
An Apache HTTP Server mod_http2 flaw that can cause a crash during a late protocol upgrade.
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.