CVE-2021-3732: Infoleak
First published: Thu Aug 12 2021(Updated: )
A flaw was found in the Linux kernel's OverlayFS subsystem in the way the user mounts the TmpFS filesystem with OverlayFS. This flaw allows a local user to gain access to hidden files that should not be accessible.
Credit: secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel-rt | <0:4.18.0-348.rt7.130.el8 | 0:4.18.0-348.rt7.130.el8 |
| redhat/kernel | <0:4.18.0-348.el8 | 0:4.18.0-348.el8 |
| Linux Linux kernel | <5.14 | |
| Linux Linux kernel | =5.14 | |
| Linux Linux kernel | =5.14-rc1 | |
| Linux Linux kernel | =5.14-rc2 | |
| Linux Linux kernel | =5.14-rc3 | |
| Linux Linux kernel | =5.14-rc4 | |
| Linux Linux kernel | =5.14-rc5 | |
| redhat/kernel | <5.14 | 5.14 |
| debian/linux | 5.10.223-1 5.10.226-1 6.1.115-1 6.1.112-1 6.11.5-1 6.11.7-1 |
Remedy
Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
- https://www.cve.org/CVERecord?id=CVE-2021-3732 https://nvd.nist.gov/vuln/detail/CVE-2021-3732 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=427215d85e8d
- https://bugzilla.redhat.com/show_bug.cgi?id=1995249
- https://access.redhat.com/errata/RHSA-2021:4140
- https://access.redhat.com/errata/RHSA-2021:4356
- https://access.redhat.com/security/cve/cve-2021-3732
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=427215d85e8d1476da1a86b8d67aceb485eb3631
- https://github.com/torvalds/linux/commit/427215d85e8d1476da1a86b8d67aceb485eb3631
- https://ubuntu.com/security/CVE-2021-3732
- https://launchpad.net/bugs/cve/CVE-2021-3732
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=427215d85e8d
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1993131
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2000964
- https://git.kernel.org/linus/427215d85e8d1476da1a86b8d67aceb485eb3631
- https://security-tracker.debian.org/tracker/CVE-2021-3732
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3732
- https://nvd.nist.gov/vuln/detail/CVE-2021-3732
- collector/redhat-cve
- collector/nvd-index
- agent/type
- agent/first-publish-date
- collector/launchpad-cve
- source/Launchpad
- agent/author
- collector/nvd-cve
- source/NVD
- agent/software-canonical-lookup
- collector/redhat-bugzilla
- source/Red Hat
- alias/CVE-2021-3732
- agent/severity
- agent/weakness
- agent/remedy
- agent/description
- agent/references
- collector/mitre-cve
- source/MITRE
- agent/last-modified-date
- agent/event
- agent/tags
- collector/security-tracker-debian
- source/Debian
- agent/softwarecombine
- collector/usn-cve
- source/Ubuntu
- package-manager/redhat
- vendor/linux
- canonical/linux linux kernel
- version/linux linux kernel/5.14
- version/linux linux kernel/5.14-rc1
- version/linux linux kernel/5.14-rc2
- version/linux linux kernel/5.14-rc3
- version/linux linux kernel/5.14-rc4
- version/linux linux kernel/5.14-rc5
- package-manager/debian