CVE-2021-26556 - Vulnerability Details - OpenCVE

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.

Published: 2021-10-07

Score: 7.8 High

EPSS: < 1% Very Low

KEV: No

Impact:

Action:

Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Octopus Deploy

Octopus Server

affected

Version	Status	Constraints
`0.9`	affected	< unspecified
`unspecified`	affected	< 2020.4.229
`2020.5.0`	affected	< unspecified
`unspecified`	affected	< 2020.5.256

Configuration 1 [-]

OR	cpe:2.3:a:octopus:octopus_deploy::::::::
	cpe:2.3:a:octopus:octopus_server::::::::

No data.

No data available yet.

Remediation

No vendor fix or workaround currently provided.

Additional remediation guidance may be available on OpenCVE Cloud.

Tracking

Sign in to view the affected projects.

Advisories

Source	ID	Title
EUVD	EUVD-2021-13355	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.

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction Required

No CVSS v3.0

Access Vector Local

Access Complexity Medium

Authentication None

Confidentiality Impact Partial

Integrity Impact Partial

Availability Impact Partial

This CVE is not in the KEV list.

The EPSS score is 0.00058.

Key SSVC decision points have not yet been added.

References

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

History

No history.

Subscriptions

Octopus Octopus Deploy Octopus Server

MITRE

Status: PUBLISHED

Assigner: Octopus

Published: 2021-10-07T01:00:12.000Z

Updated: 2024-08-03T20:26:25.523Z

Reserved: 2021-02-02T00:00:00.000Z

Link: CVE-2021-26556

Vulnrichment

No data.

NVD

Status : Modified

Published: 2021-10-07T01:15:07.010

Modified: 2024-11-21T05:56:27.703

Link: CVE-2021-26556

Redhat

No data.

OpenCVE Enrichment

No data.

Weaknesses

CWE-426

{"containers": {"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"}]}], "descriptions": [{"lang": "en", "value": "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."}], "problemTypes": [{"descriptions": [{"description": "Local privilege escalation in Octopus Server (Windows)", "lang": "en", "type": "text"}]}], "providerMetadata": {"dateUpdated": "2021-10-07T01:00:12.000Z", "orgId": "6f4f8c89-ef06-4bae-a2a5-6734ddf76272", "shortName": "Octopus"}, "references": [{"tags": ["x_refsource_MISC"], "url": "https://advisories.octopus.com/adv/2021-01---Local-privilege-escalation-in-Octopus-Server-%28CVE-2021-26556%29.1733296189.html"}], "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "security@octopus.com", "ID": "CVE-2021-26556", "STATE": "PUBLIC"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "Octopus Server", "version": {"version_data": [{"version_affected": ">=", "version_value": "0.9"}, {"version_affected": "<", "version_value": "2020.4.229"}, {"version_affected": ">=", "version_value": "2020.5.0"}, {"version_affected": "<", "version_value": "2020.5.256"}]}}]}, "vendor_name": "Octopus Deploy"}]}}, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "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."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "Local privilege escalation in Octopus Server (Windows)"}]}]}, "references": {"reference_data": [{"name": "https://advisories.octopus.com/adv/2021-01---Local-privilege-escalation-in-Octopus-Server-(CVE-2021-26556).1733296189.html", "refsource": "MISC", "url": "https://advisories.octopus.com/adv/2021-01---Local-privilege-escalation-in-Octopus-Server-(CVE-2021-26556).1733296189.html"}]}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-03T20:26:25.523Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://advisories.octopus.com/adv/2021-01---Local-privilege-escalation-in-Octopus-Server-%28CVE-2021-26556%29.1733296189.html"}]}]}, "cveMetadata": {"assignerOrgId": "6f4f8c89-ef06-4bae-a2a5-6734ddf76272", "assignerShortName": "Octopus", "cveId": "CVE-2021-26556", "datePublished": "2021-10-07T01:00:12.000Z", "dateReserved": "2021-02-02T00:00:00.000Z", "dateUpdated": "2024-08-03T20:26:25.523Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:octopus:octopus_deploy:*:*:*:*:*:*:*:*", "matchCriteriaId": "BB1A49F9-06B0-435A-9A46-4BF727C4DE03", "versionEndExcluding": "2020.4.229", "versionStartIncluding": "0.9", "vulnerable": true}, {"criteria": "cpe:2.3:a:octopus:octopus_server:*:*:*:*:*:*:*:*", "matchCriteriaId": "EF275C0A-3A31-4751-9C65-CEC4B22CB6EC", "versionEndExcluding": "2020.5.256", "versionStartIncluding": "2020.5.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "descriptions": [{"lang": "en", "value": "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."}, {"lang": "es", "value": "Cuando Octopus Server se instala usando una ubicaci\u00f3n de carpeta personalizada, las ACL de carpeta no se establecen correctamente y podr\u00edan conllevar a que un usuario no privilegiado use una carga lateral de DLL para conseguir acceso privilegiado"}], "id": "CVE-2021-26556", "lastModified": "2024-11-21T05:56:27.703", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "MEDIUM", "accessVector": "LOCAL", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 4.4, "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "vectorString": "AV:L/AC:M/Au:N/C:P/I:P/A:P", "version": "2.0"}, "exploitabilityScore": 3.4, "impactScore": 6.4, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": true}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2021-10-07T01:15:07.010", "references": [{"source": "security@octopus.com", "url": "https://advisories.octopus.com/adv/2021-01---Local-privilege-escalation-in-Octopus-Server-%28CVE-2021-26556%29.1733296189.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://advisories.octopus.com/adv/2021-01---Local-privilege-escalation-in-Octopus-Server-%28CVE-2021-26556%29.1733296189.html"}], "sourceIdentifier": "security@octopus.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-426"}], "source": "nvd@nist.gov", "type": "Primary"}]}