Lucene search

[email protected]CVE-2021-26556

HistoryOct 07, 2021 - 1:15 a.m.

CVE-2021-26556

2021-10-0701:15:07

CWE-426

[email protected]

web.nvd.nist.gov

cve-2021-26556

octopus server

custom folder

acls

dll side-loading

privileged access

nvd

4.4 Medium

CVSS2

Attack Vector

LOCAL

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:L/AC:M/Au:N/C:P/I:P/A:P

7.8 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

7.6 High

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

27.4%

JSON

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.

Affected configurations

NVD

Node

octopusoctopus_deployRange0.9–2020.4.229

octopusoctopus_serverRange2020.5.0–2020.5.256

CPENameOperatorVersion
octopus:octopus_deployoctopus octopus deploylt2020.4.229
octopus:octopus_serveroctopus octopus serverlt2020.5.256

CPE	Name	Operator	Version
octopus:octopus_deploy	octopus octopus deploy	lt	2020.4.229
octopus:octopus_server	octopus octopus server	lt	2020.5.256

CNA Affected

[
  {
    "product": "Octopus Server",
    "vendor": "Octopus Deploy",
    "versions": [
      {
        "lessThan": "unspecified",
        "status": "affected",
        "version": "0.9",
        "versionType": "custom"
      },
      {
        "lessThan": "2020.4.229",
        "status": "affected",
        "version": "unspecified",
        "versionType": "custom"
      },
      {
        "lessThan": "unspecified",
        "status": "affected",
        "version": "2020.5.0",
        "versionType": "custom"
      },
      {
        "lessThan": "2020.5.256",
        "status": "affected",
        "version": "unspecified",
        "versionType": "custom"
      }
    ]
  }
]

References

advisories.octopus.com/adv/2021-01---Local-privilege-escalation-in-Octopus-Server-%28CVE-2021-26556%29.1733296189.html

Social References

4.4 Medium

CVSS2

Attack Vector

LOCAL

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:L/AC:M/Au:N/C:P/I:P/A:P

7.8 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

7.6 High

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

27.4%

JSON

Related for CVE-2021-26556

cvelist1 prion1 nvd1