Resource exhaustion in Red Hat Enterprise Linux
CVE-2021-3690
A flaw was found in Undertow. A buffer leak on the incoming WebSocket PONG message may lead to memory exhaustion. This flaw allows an attacker to cause a denial of service. The highest threat from this vulnerability is availability.
Vulnerability class: DoS (Denial of Service)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.018 (78.2th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 78th percentile — 78.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.017 · newest: 0.018 · change: +0.001
Affected products
- Red Hat Enterprise Linux — versions 6.0, 7.0, 8.0
- Red Hat Fuse — versions 1.0
- Red Hat Integration Camel K
- Red Hat Integration Camel Quarkus
- Red Hat Jboss Enterprise Application Platform — versions 7.3, 7.4
- Red Hat Openshift Application Runtimes
- Red Hat Single Sign-On
- Red Hat Undertow
- Undertow — versions Fixed in 2.2.10.Final, 2.0.40.Final
Weakness classification (CWE)
Public proof-of-concept exploits
References
- issues.redhat.com/browse/UNDERTOW-1935 (Exploit, Mitigation, Issue Tracking, Vendor Advisory)
- bugzilla.redhat.com/show_bug.cgi (Issue Tracking, Vendor Advisory)
- access.redhat.com/security/cve/CVE-2021-3690 (Vendor Advisory)
- github.com/undertow-io/undertow/commit/c7e84a0b7efced38506d7d1dfea5902366973877 (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-3690?
- CVE-2021-3690 is a high-severity vulnerability in Red Hat Enterprise Linux, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2022-08-23.
- How severe is CVE-2021-3690?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2021-3690 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.