Bug 2092022 (CVE-2022-31739)

Summary:	CVE-2022-31739 Mozilla: Attacker-influenced path traversal when saving downloaded files
Product:	[Other] Security Response	Reporter:	Mauro Matteo Cascella <mcascell>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	erack, jhorak, nobody, stransky, tpopela
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	firefox 91.10	Doc Type:	---
Doc Text:	A flaw was found in Mozilla. The Mozilla Foundation Security Advisory describes the issue of when downloading files on Windows, the % character was not escaped, which could have led to a download incorrectly saved to attacker-influenced paths that used variables such as %HOMEPATH% or %APPDATA%.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2022-05-31 14:47:41 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:	2089646

Description Mauro Matteo Cascella 2022-05-31 14:44:44 UTC

When downloading files on Windows, the % character was not escaped, which could have lead to a download incorrectly being saved to attacker-influenced paths that used variables such as %HOMEPATH% or %APPDATA%.

*This bug only affects Firefox for Windows. Other operating systems are unaffected.*


External Reference:
https://www.mozilla.org/en-US/security/advisories/mfsa2022-21/#CVE-2022-31739