CVE-2020-35471 : Envoy before 1.16.1 mishandles dropped and truncated datagrams, as demonstrated

Envoy before 1.16.1 mishandles dropped and truncated datagrams, as demonstrated by a segmentation fault for a UDP packet size larger than 1500.

Published 2020-12-15 01:15:14

Updated 2020-12-16 16:54:59

Source MITRE

View at NVD, CVE.org

Vulnerability category: Memory Corruption

Products affected by CVE-2020-35471

Envoyproxy » Envoy
Versions before (<) 1.16.1
cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*
Matching versions

EPSS FAQ

0.24%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 61 %

Percentile, the proportion of vulnerabilities that are scored at or less

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
5.0	MEDIUM	AV:N/AC:L/Au:N/C:N/I:N/A:P	10.0	2.9	NIST
Access Vector: Network Access Complexity: Low Authentication: None Confidentiality Impact: None Integrity Impact: None Availability Impact: Partial
7.5	HIGH	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	3.9	3.6	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: None Integrity: None Availability: High

https://github.com/envoyproxy/envoy/pull/14122

udp: properly handle truncated/dropped datagrams by cpakulski · Pull Request #14122 · envoyproxy/envoy · GitHub
Patch;Third Party Advisory
https://github.com/envoyproxy/envoy/compare/v1.16.0...v1.16.1

Comparing v1.16.0...v1.16.1 · envoyproxy/envoy · GitHub
Patch;Third Party Advisory

CVEs referencing this url
https://github.com/envoyproxy/envoy/issues/14113

crash when udp packet size large than 1500 · Issue #14113 · envoyproxy/envoy · GitHub
Exploit;Third Party Advisory

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