Executive Summary



This Alert is flagged as TOP 25 Common Weakness Enumeration from CWE/SANS. For more information, you can read this.
Informations
Name CVE-2021-40153 First vendor Publication 2021-08-27
Vendor Cve Last vendor Modification 2021-10-07

Security-Database Scoring CVSS v3

Cvss vector : CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H
Overall CVSS Score 8.1
Base Score 8.1 Environmental Score 8.1
impact SubScore 5.2 Temporal Score 8.1
Exploitabality Sub Score 2.8
 
Attack Vector Network Attack Complexity Low
Privileges Required None User Interaction Required
Scope Unchanged Confidentiality Impact None
Integrity Impact High Availability Impact High
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:M/Au:N/C:N/I:P/A:P)
Cvss Base Score 5.8 Attack Range Network
Cvss Impact Score 4.9 Attack Complexity Medium
Cvss Expoit Score 8.6 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

squashfs_opendir in unsquash-1.c in Squashfs-Tools 4.5 stores the filename in the directory entry; this is then used by unsquashfs to create the new file during the unsquash. The filename is not validated for traversal outside of the destination directory, and thus allows writing to locations outside of the destination.

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-40153

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') (CWE/SANS Top 25)

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 1
Os 2
Os 2
Os 2

Sources (Detail)

Source Url
DEBIAN https://www.debian.org/security/2021/dsa-4967
FEDORA https://lists.fedoraproject.org/archives/list/package-announce@lists.fedorapr...
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedorapr...
MISC https://bugs.launchpad.net/ubuntu/+source/squashfs-tools/+bug/1941790
https://github.com/plougher/squashfs-tools/commit/79b5a555058eef4e1e7ff220c34...
https://github.com/plougher/squashfs-tools/issues/72
MLIST https://lists.debian.org/debian-lts-announce/2021/08/msg00030.html

Alert History

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Date Informations
2021-10-07 21:23:26
  • Multiple Updates
2021-09-29 09:23:32
  • Multiple Updates
2021-09-08 00:23:01
  • Multiple Updates
2021-09-05 09:22:54
  • Multiple Updates
2021-09-01 21:23:12
  • Multiple Updates
2021-09-01 00:22:52
  • Multiple Updates
2021-08-31 05:22:49
  • Multiple Updates
2021-08-28 09:22:51
  • Multiple Updates
2021-08-27 21:23:12
  • First insertion