CVE-2021-29221

A local privilege escalation vulnerability was discovered in Erlang/OTP prior to version 23.2.3. By adding files to an existing installation's directory, a local attacker could hijack accounts of other users running Erlang programs or possibly coerce a service running with "erlsrv.exe" to execute arbitrary code as Local System. This can occur only under specific conditions on Windows with unsafe filesystem permissions.

CVSS v3.0 7.0 HIGH
CVSS v2.0 6.2 MEDIUM

7.0^/10

CVSS v3.0 : HIGH

Vector :

Exploitability : 1.0 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity HIGH

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

6.2^/10

CVSS v2.0 : MEDIUM

Vector : AV:L/AC:H/Au:N/C:C/I:C/A:C

Exploitability : 1.9 / Impact : 10.0

Access Vector LOCAL

Access Complexity HIGH

Authentication NONE

Confidentiality Impact COMPLETE

Integrity Impact COMPLETE

Availability Impact COMPLETE

References

Link	Resource
https://deepsurface.com/deepsurface-security-advisory-local-privilege-escalation-in-erlang-on-windows-cve-2021-29221/	Exploit Third Party Advisory
https://github.com/erlang/otp/releases/tag/OTP-23.2.3	Third Party Advisory

Advertisement

Configurations

Configuration 1 (hide)

AND

cpe:2.3:a:erlang:erlang\/otp:*:*:*:*:*:*:*:*

cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*

Information

Published : 2021-04-09 07:15

Updated : 2021-04-20 11:00

NVD link : CVE-2021-29221

Mitre link : CVE-2021-29221

JSON object : View

CWE

CWE-426

Untrusted Search Path

Advertisement

Products Affected

erlang

erlang\/otp

microsoft

windows

{"cve": {"data_type": "CVE", "references": {"reference_data": [{"url": "https://deepsurface.com/deepsurface-security-advisory-local-privilege-escalation-in-erlang-on-windows-cve-2021-29221/", "name": "https://deepsurface.com/deepsurface-security-advisory-local-privilege-escalation-in-erlang-on-windows-cve-2021-29221/", "tags": ["Exploit", "Third Party Advisory"], "refsource": "MISC"}, {"url": "https://github.com/erlang/otp/releases/tag/OTP-23.2.3", "name": "https://github.com/erlang/otp/releases/tag/OTP-23.2.3", "tags": ["Third Party Advisory"], "refsource": "MISC"}]}, "data_format": "MITRE", "description": {"description_data": [{"lang": "en", "value": "A local privilege escalation vulnerability was discovered in Erlang/OTP prior to version 23.2.3. By adding files to an existing installation's directory, a local attacker could hijack accounts of other users running Erlang programs or possibly coerce a service running with \"erlsrv.exe\" to execute arbitrary code as Local System. This can occur only under specific conditions on Windows with unsafe filesystem permissions."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "en", "value": "CWE-426"}]}]}, "data_version": "4.0", "CVE_data_meta": {"ID": "CVE-2021-29221", "ASSIGNER": "security@deepsurface.com"}}, "impact": {"baseMetricV2": {"cvssV2": {"version": "2.0", "baseScore": 6.2, "accessVector": "LOCAL", "vectorString": "AV:L/AC:H/Au:N/C:C/I:C/A:C", "authentication": "NONE", "integrityImpact": "COMPLETE", "accessComplexity": "HIGH", "availabilityImpact": "COMPLETE", "confidentialityImpact": "COMPLETE"}, "severity": "MEDIUM", "acInsufInfo": false, "impactScore": 10.0, "obtainAllPrivilege": false, "exploitabilityScore": 1.9, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": true}, "baseMetricV3": {"cvssV3": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.0, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "REQUIRED", "attackComplexity": "HIGH", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.0}}, "publishedDate": "2021-04-09T14:15Z", "configurations": {"nodes": [{"children": [{"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "23.2.3"}]}, {"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}]}], "operator": "AND", "cpe_match": []}], "CVE_data_version": "4.0"}, "lastModifiedDate": "2021-04-20T18:00Z"}