CVE-2019-9515
CWE-400 — Uncontrolled Resource ConsumptionCWE-770 — Allocation without Limits21 documents10 sources
Severity
7.5HIGH
EPSS
9.0%
top 7.36%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
Timeline
PublishedAug 13
Latest updateMay 24
Description
Some HTTP/2 implementations are vulnerable to a settings flood, potentially leading to a denial of service. The attacker sends a stream of SETTINGS frames to the peer. Since the RFC requires that the peer reply with one acknowledgement per SETTINGS frame, an empty SETTINGS frame is almost equivalent in behavior to a ping. Depending on how efficiently this data is queued, this can consume excess CPU, memory, or both.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitability: 3.9 | Impact: 3.6
Affected Packages19 packages
Also affects: Debian Linux 10.0, 9.0, Fedora 29, 30, Ubuntu Linux 16.04, 18.04, 19.04, Enterprise Linux 8.0, Openshift Container Platform 4.1
🔴Vulnerability Details
7GHSA▶
GHSA-9259-5376-vjcj: Some HTTP/2 implementations are vulnerable to a settings flood, potentially leading to a denial of service↗2022-05-24
📋Vendor Advisories
5Debian▶
CVE-2019-9515: h2o - Some HTTP/2 implementations are vulnerable to a settings flood, potentially lead...↗2019
💬Community
8Bugzilla▶
CVE-2019-9515 undertow: HTTP/2: flood using SETTINGS frames results in unbounded memory growth [fedora-all]↗2019-09-03
Bugzilla▶
CVE-2019-9515 nodejs: HTTP/2: flood using SETTINGS frames results in unbounded memory growth [epel-all]↗2019-08-16
Bugzilla▶
CVE-2019-9515 nodejs: HTTP/2: flood using SETTINGS frames results in unbounded memory growth [fedora-all]↗2019-08-16
Bugzilla▶
CVE-2019-9515 nginx: HTTP/2: flood using SETTINGS frames results in unbounded memory growth [epel-all]↗2019-08-16
Bugzilla▶
CVE-2019-9515 nodejs: http/2: HTTP/2 flood using SETTINGS frames results in unbounded memory growth [epel-all]↗2019-08-16