CVE-2020-35471: envoyproxy envoy
CVSS: 7.5v3.1HighModified
Published 15-12-2020Last modified 04-08-2024
Vulnerability summary
CVE-2020-35471 is a high (CVSS 7.5) vulnerability in envoyproxy envoy. EPSS estimates a 2.39% chance of exploitation in the next 30 days, higher than 83.7% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
7.5/10
010
High · v3.1 (NVD)EPSS score
2.39%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1github
Advisory lineage
Upstream 0 · Downstream 1 · Related 1Timeline
- 15-12-2020PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
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 metrics
2 scores · 1 source · 2 versionsHigh 7.5Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HSourcesSingle source
Medium 5.0Preferred score · NVD (NIST)
AV:N/AC:L/Au:N/C:N/I:N/A:PSourcesSingle source
EPSS trend
Probability
2.39%
Chance of exploitation in the next 30 days
Percentile
84%
Versus all other CVEs
30-day change
0.00 pp
From 2.39% on 20-09-2026
20-09-202620-10-2026
EPSS score2.39%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundEnvoy
Maturity: poc
Weaknesses
CWE · root causeNo weakness data has been published for this record.
Affected systems
Envoyproxy1 product
- envoy< 1.16.1
1 vendor · 1 product