Bug 1955760 (CVE-2020-35963)

Summary:	CVE-2020-35963 fluent-bit: Out of bounds write in flb_gzip_compress in flb_gzip.c
Product:	[Other] Security Response	Reporter:	Pedro Sampaio <psampaio>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	gghezzo, gparvin, jramanat, jweiser, stcannon, thee
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-05-11 20:33:52 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	1955762

Description Pedro Sampaio 2021-04-30 18:17:21 UTC

flb_gzip_compress in flb_gzip.c in Fluent Bit before 1.6.4 has an out-of-bounds write because it does not use the correct calculation of the maximum gzip data-size expansion.

References:

http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-35963
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=27261
https://github.com/fluent/fluent-bit/commit/cadff53c093210404aed01c4cf586adb8caa07af
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-35963
https://fluentbit.io/announcements/v1.6.4/

Comment 1 Product Security DevOps Team 2021-05-11 20:33:52 UTC

This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2020-35963