High severity · published Oct 7, 2021
CVE-2021-26556
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…
7.8
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 18% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
OD
Octopus Deploy · Octopus
0.9 before 2020.4.229 · source: NVD
OS
Octopus Server · Octopus
2020.5.0 before 2020.5.256 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-26556
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-26556
advisories.octopus.com
https://advisories.octopus.com/adv/2021-01---Local-privilege-escalation-in-Octopus-Server-%28CVE-2021-26556%29.1733296189.html
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