Headline
CVE-2021-3802: insecure defaults in user-accessible mount helpers allow for a DoS
A vulnerability found in udisks2. This flaw allows an attacker to input a specially crafted image file/USB leading to kernel panic. The highest threat from this vulnerability is to system availability.
Bug 2003649 (CVE-2021-3802) - CVE-2021-3802 udisks2: insecure defaults in user-accessible mount helpers allow for a DoS
Summary: CVE-2021-3802 udisks2: insecure defaults in user-accessible mount helpers all…
Keywords:
Status:
NEW
Alias:
CVE-2021-3802
Product:
Security Response
Classification:
Other
Component:
vulnerability
Sub Component:
Version:
unspecified
Hardware:
All
OS:
Linux
Priority:
low
Severity:
low
Target Milestone:
—
Assignee:
Red Hat Product Security
QA Contact:
Docs Contact:
URL:
Whiteboard:
Depends On:
2004422 2004423 2003650
Blocks:
2017003 2003653
TreeView+
depends on / blocked
Reported:
2021-09-13 11:48 UTC by Marian Rehak
Modified:
2021-10-25 11:42 UTC (History)
CC List:
4 users (show)
Fixed In Version:
udisks-2.9.4
Doc Type:
If docs needed, set a value
Doc Text:
A vulnerability found in udisks2. This flaw allows an attacker to input a specially crafted image file/USB leading to kernel panic. The highest threat from this vulnerability is to system availability.
Clone Of:
Environment:
Last Closed:
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Description Marian Rehak 2021-09-13 11:48:56 UTC
Several user-accessible mount helpers use insecure defaults which allow ext2/3/4 file systems to cause a denial of service (kernel panic) upon mounting a crafted image. This is especially relevant when mounts can be caused by unprivileged users or are configured to happen automatically and completely unauthorized.
External Reference:
https://www.syss.de/fileadmin/dokumente/Publikationen/Advisories/SYSS-2021-045.txt
Comment 1 Marian Rehak 2021-09-13 11:49:16 UTC
Created udisks2 tracking bugs for this issue:
Affects: fedora-all [bug 2003650]
Comment 7 Marian Rehak 2021-09-15 09:28:56 UTC
Copyright license of original report: https://creativecommons.org/licenses/by/3.0/deed.en
Comment 9 Tomáš Bžatek 2021-10-04 12:16:38 UTC
Fix available upstream as part of the udisks-2.9.4 release: https://github.com/storaged-project/udisks/releases/tag/udisks-2.9.4
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