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: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED NOTABUG QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: gghezzo, gparvin, jramanat, jweiser, stcannon, thee
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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Last Closed: 2021-05-11 20:33:52 UTC Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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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