CVE-2021-3996 (GCVE-0-2021-3996)
Vulnerability from cvelistv5
Published
2022-08-23 00:00
Modified
2024-10-15 15:26
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE
  • CWE-552 - - Files or Directories Accessible to External Parties
Summary
A logic error was found in the libmount library of util-linux in the function that allows an unprivileged user to unmount a FUSE filesystem. This flaw allows a local user on a vulnerable system to unmount other users' filesystems that are either world-writable themselves (like /tmp) or mounted in a world-writable directory. An attacker may use this flaw to cause a denial of service to applications that use the affected filesystems.
References
secalert@redhat.com http://packetstormsecurity.com/files/170176/snap-confine-must_mkdir_and_open_with_perms-Race-Condition.html Third Party Advisory
secalert@redhat.com http://seclists.org/fulldisclosure/2022/Dec/4 Mailing List, Third Party Advisory
secalert@redhat.com http://www.openwall.com/lists/oss-security/2022/11/30/2 Mailing List, Third Party Advisory
secalert@redhat.com https://access.redhat.com/security/cve/CVE-2021-3996 Issue Tracking, Third Party Advisory
secalert@redhat.com https://bugzilla.redhat.com/show_bug.cgi?id=2024628 Issue Tracking, Patch, Third Party Advisory
secalert@redhat.com https://github.com/util-linux/util-linux/commit/166e87368ae88bf31112a30e078cceae637f4cdb Patch, Third Party Advisory
secalert@redhat.com https://mirrors.edge.kernel.org/pub/linux/utils/util-linux/v2.37/v2.37.3-ReleaseNotes Release Notes, Vendor Advisory
secalert@redhat.com https://security.gentoo.org/glsa/202401-08
secalert@redhat.com https://security.netapp.com/advisory/ntap-20221209-0002/ Broken Link, Third Party Advisory
secalert@redhat.com https://www.openwall.com/lists/oss-security/2022/01/24/2 Exploit, Mailing List, Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 http://packetstormsecurity.com/files/170176/snap-confine-must_mkdir_and_open_with_perms-Race-Condition.html Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 http://seclists.org/fulldisclosure/2022/Dec/4 Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 http://www.openwall.com/lists/oss-security/2022/11/30/2 Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 https://access.redhat.com/security/cve/CVE-2021-3996 Issue Tracking, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 https://bugzilla.redhat.com/show_bug.cgi?id=2024628 Issue Tracking, Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 https://github.com/util-linux/util-linux/commit/166e87368ae88bf31112a30e078cceae637f4cdb Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 https://mirrors.edge.kernel.org/pub/linux/utils/util-linux/v2.37/v2.37.3-ReleaseNotes Release Notes, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108 https://security.gentoo.org/glsa/202401-08
af854a3a-2127-422b-91ae-364da2661108 https://security.netapp.com/advisory/ntap-20221209-0002/ Broken Link, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 https://www.openwall.com/lists/oss-security/2022/01/24/2 Exploit, Mailing List, Patch, Third Party Advisory
Impacted products
Vendor Product Version
n/a util-linux Version: Fixed in util-linux v2.37.3
Show details on NVD website

To clipboard 

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  }
}


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Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.