High severity · published Dec 15, 2020
CVE-2020-35471
Envoy before 1.16.1 mishandles dropped and truncated datagrams, as demonstrated by a segmentation fault for a UDP packet size larger than 1500
7.5
CVSS
2.4%
EPSS
No
On KEV
Description
Envoy before 1.16.1 mishandles dropped and truncated datagrams, as demonstrated by a segmentation fault for a UDP packet size larger than 1500.
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)2.4% · higher than 84% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
EN
Envoy · Envoyproxy
before 1.16.1 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-35471
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-35471
Patch
https://github.com/envoyproxy/envoy/compare/v1.16.0...v1.16.1
Exploit
https://github.com/envoyproxy/envoy/issues/14113
Patch
https://github.com/envoyproxy/envoy/pull/14122
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