High severity · published Nov 11, 2019
CVE-2019-18836
Envoy 1.12.0 allows a remote denial of service because of resource loops, as demonstrated by a single idle TCP connection being able to keep a worker thread in an infinite busy…
7.5
CVSS
1.9%
EPSS
No
On KEV
Description
Envoy 1.12.0 allows a remote denial of service because of resource loops, as demonstrated by a single idle TCP connection being able to keep a worker thread in an infinite busy loop when continue_on_listener_filters_timeout is used."
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.9% · higher than 80% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
EN
Envoy · Envoyproxy
1.12.0 · source: NVD
IS
Istio · Istio
1.3.0 through 1.3.3 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-18836
CVE.org
https://www.cve.org/CVERecord?id=CVE-2019-18836
Vendor Advisory
https://blog.envoyproxy.io
Exploit
https://github.com/envoyproxy/envoy/security/advisories/GHSA-3xvf-4396-cj46
Exploit
https://github.com/istio/istio/issues/18229
groups.google.com
https://groups.google.com/forum/#%21forum/envoy-users
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