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CVE-2019-0211: Apache HTTP Server Privilege Escalation Vulnerability

criticalknown exploitedpublic exploitCVE-2019-0211
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
Apache HTTP Server, with MPM event, worker or prefork, code executing in less-privileged child processes or threads (including scripts executed by an in-process scripting interpreter) could execute code with the privileges of the parent process (usually root) by manipulating the scoreboard.

CSIRTS triage

vendor: Apacheproduct: HTTP ServerPrivilege escalation
What
Apache HTTP Server could execute code with the privileges of the parent process due to a privilege escalation vulnerability.
Who is affected
Deployments using Apache HTTP Server with MPM event, worker, or prefork.
Urgency
Remediation is urgent due to active exploitation and critical severity.
Action
Upgrade to the patched version of Apache HTTP Server.

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Details

Source
CISA Known Exploited Vulnerabilities (US · database · site)
Severity
critical
Published
2021-11-03
Exploitation
Observed in the wild (CISA KEV)

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2019-0211

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2019-0211coverage & exploitation statusNVD · CVE.org

Recent advisories for Apache HTTP Server

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

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