CVE-2021-41556
Squirrel Out-of-Bounds Read Leads to Code Execution
Description
sqclass.cpp in Squirrel through 2.2.5 and 3.x through 3.1 allows an out-of-bounds read (in the core interpreter) that can lead to Code Execution. If a victim executes an attacker-controlled squirrel script, it is possible for the attacker to break out of the squirrel script sandbox even if all dangerous functionality such as File System functions has been disabled. An attacker might abuse this bug to target (for example) Cloud services that allow customization via SquirrelScripts, or distribute malware through video games that embed a Squirrel Engine.
INFO
Published Date :
July 28, 2022, 9:15 p.m.
Last Modified :
Nov. 7, 2023, 3:38 a.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
6.0
Exploitability Score :
3.9
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-41556.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-41556 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-41556 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
Nov. 07, 2023
Action Type Old Value New Value Added Reference MITRE https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BV7SJJ44AGAX4ILIVPREIXPJ2GOG3FKV/ [No types assigned] Added Reference MITRE https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/M3FQILX7UUEERSDPMZP3MKGTMY2E7ESU/ [No types assigned] Removed Reference MITRE https://lists.fedoraproject.org/archives/list/[email protected]/message/BV7SJJ44AGAX4ILIVPREIXPJ2GOG3FKV/ Removed Reference MITRE https://lists.fedoraproject.org/archives/list/[email protected]/message/M3FQILX7UUEERSDPMZP3MKGTMY2E7ESU/ -
Modified Analysis by [email protected]
Dec. 09, 2022
Action Type Old Value New Value Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/BV7SJJ44AGAX4ILIVPREIXPJ2GOG3FKV/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/BV7SJJ44AGAX4ILIVPREIXPJ2GOG3FKV/ Mailing List, Third Party Advisory Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/M3FQILX7UUEERSDPMZP3MKGTMY2E7ESU/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/M3FQILX7UUEERSDPMZP3MKGTMY2E7ESU/ Mailing List, Third Party Advisory Added CPE Configuration OR *cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:* *cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Aug. 10, 2022
Action Type Old Value New Value Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/BV7SJJ44AGAX4ILIVPREIXPJ2GOG3FKV/ [No Types Assigned] Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/M3FQILX7UUEERSDPMZP3MKGTMY2E7ESU/ [No Types Assigned] -
Initial Analysis by [email protected]
Aug. 05, 2022
Action Type Old Value New Value Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H Changed Reference Type http://www.squirrel-lang.org/#download No Types Assigned http://www.squirrel-lang.org/#download Third Party Advisory Changed Reference Type https://blog.sonarsource.com/squirrel-vm-sandbox-escape/ No Types Assigned https://blog.sonarsource.com/squirrel-vm-sandbox-escape/ Exploit, Third Party Advisory Changed Reference Type https://github.com/albertodemichelis/squirrel/commit/23a0620658714b996d20da3d4dd1a0dcf9b0bd98 No Types Assigned https://github.com/albertodemichelis/squirrel/commit/23a0620658714b996d20da3d4dd1a0dcf9b0bd98 Patch, Third Party Advisory Added CWE NIST CWE-125 Added CPE Configuration OR *cpe:2.3:a:squirrel-lang:squirrel:*:*:*:*:*:*:*:* versions up to (including) 2.2.5 *cpe:2.3:a:squirrel-lang:squirrel:*:*:*:*:*:*:*:* versions from (including) 3.0 up to (including) 3.1
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-41556 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-41556
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.49 }} 0.01%
score
0.75744
percentile