Bug 1927277 (CVE-2020-25630)

Summary:	CVE-2020-25630 moodle: decompressed size of zip files leads to denial of service
Product:	[Other] Security Response	Reporter:	Dhananjay Arunesh <darunesh>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	gwync, igor.raits, mrehak, sergio
Target Milestone:	---	Keywords:	Reopened, Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:	A flaw was found in Moodle where the decompressed size of zip files was not checked against the available user quota before unzipping them, which could lead to a denial of service risk. This issue affects versions 3.9 to 3.9.1, 3.8 to 3.8.4, 3.7 to 3.7.7, 3.5 to 3.5.13, and earlier unsupported versions. This is fixed in versions 3.9.2, 3.8.5, 3.7.8, and 3.5.14.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-02-11 10:09:45 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:	1927278, 1927286
Bug Blocks:

Description Dhananjay Arunesh 2021-02-10 12:55:47 UTC

A vulnerability was found in Moodle where the decompressed size of zip files was not checked against available user quota before unzipping them, which could lead to a denial of service risk. This affects versions 3.9 to 3.9.1, 3.8 to 3.8.4, 3.7 to 3.7.7, 3.5 to 3.5.13 and earlier unsupported versions. Fixed in 3.9.2, 3.8.5, 3.7.8 and 3.5.14.

Comment 1 Dhananjay Arunesh 2021-02-10 12:56:44 UTC

External References:

https://moodle.org/mod/forum/discuss.php?d=410842

Comment 2 Dhananjay Arunesh 2021-02-10 12:57:06 UTC

Created moodle tracking bugs for this issue:

Affects: fedora-all [bug 1927278]

Comment 3 Dhananjay Arunesh 2021-02-10 13:05:51 UTC

Created moodle tracking bugs for this issue:

Affects: epel-7 [bug 1927286]

Comment 4 Marian Rehak 2021-02-11 08:53:01 UTC

Security flaws will close automatically upon closing the last tracker. There is still a tracker for epel-7 that is open. Reopened the flaw.

Comment 5 Product Security DevOps Team 2021-02-11 10:09:45 UTC

This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.