CVE-2021-26556
Octopus Server Privilege Escalation Vulnerability
Description
When Octopus Server is installed using a custom folder location, folder ACLs are not set correctly and could lead to an unprivileged user using DLL side-loading to gain privileged access.
INFO
Published Date :
Oct. 7, 2021, 1:15 a.m.
Last Modified :
Nov. 21, 2024, 5:56 a.m.
Source :
[email protected]
Remotely Exploitable :
No
Impact Score :
5.9
Exploitability Score :
1.8
Affected Products
The following products are affected by CVE-2021-26556
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
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-2021-26556.
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-2021-26556 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-26556 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 af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://advisories.octopus.com/adv/2021-01---Local-privilege-escalation-in-Octopus-Server-%28CVE-2021-26556%29.1733296189.html -
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 Octopus Deploy https://advisories.octopus.com/adv/2021-01---Local-privilege-escalation-in-Octopus-Server-%28CVE-2021-26556%29.1733296189.html [No types assigned] Removed Reference Octopus Deploy https://advisories.octopus.com/adv/2021-01---Local-privilege-escalation-in-Octopus-Server-(CVE-2021-26556).1733296189.html -
CPE Deprecation Remap by [email protected]
Jul. 27, 2022
Action Type Old Value New Value Changed CPE Configuration OR *cpe:2.3:a:octopus:octopus_deploy:*:*:*:*:*:*:*:* versions from (including) 2020.5.0 from (excluding) 2020.5.256 OR *cpe:2.3:a:octopus:octopus_server:*:*:*:*:*:*:*:* versions from (including) 2020.5.0 from (excluding) 2020.5.256 -
Initial Analysis by [email protected]
Oct. 15, 2021
Action Type Old Value New Value Added CVSS V2 Metadata Victim must voluntarily interact with attack mechanism Added CVSS V2 NIST (AV:L/AC:M/Au:N/C:P/I:P/A:P) Added CVSS V3.1 NIST AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Changed Reference Type https://advisories.octopus.com/adv/2021-01---Local-privilege-escalation-in-Octopus-Server-(CVE-2021-26556).1733296189.html No Types Assigned https://advisories.octopus.com/adv/2021-01---Local-privilege-escalation-in-Octopus-Server-(CVE-2021-26556).1733296189.html Vendor Advisory Added CWE NIST CWE-426 Added CPE Configuration OR *cpe:2.3:a:octopus:octopus_deploy:*:*:*:*:*:*:*:* versions from (including) 0.9 up to (excluding) 2020.4.229 *cpe:2.3:a:octopus:octopus_deploy:*:*:*:*:*:*:*:* versions from (including) 2020.5.0 up to (excluding) 2020.5.256
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-26556 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-2021-26556
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.06 }} 0.00%
score
0.27313
percentile