CVE-2021-29221

high
New! CVE Severity Now Using CVSS v3

The calculated severity for CVEs has been updated to use CVSS v3 by default. CVEs that do not have a CVSS v3 score will fall back CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Description

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.

References

https://deepsurface.com/deepsurface-security-advisory-local-privilege-escalation-in-erlang-on-windows-cve-2021-29221/

https://github.com/erlang/otp/releases/tag/OTP-23.2.3

Details

Source: MITRE

Published: 2021-04-09

Updated: 2021-04-20

Type: CWE-426

Risk Information

CVSS v2

Base Score: 6.2

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

Impact Score: 10

Exploitability Score: 1.9

Severity: MEDIUM

CVSS v3

Base Score: 7

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

Impact Score: 5.9

Exploitability Score: 1

Severity: HIGH

Tenable Plugins

View all (2 total)

IDNameProductFamilySeverity
151953Photon OS 1.0: Erlang PHSA-2021-1.0-0414NessusPhotonOS Local Security Checks
high
149823Photon OS 3.0: Erlang PHSA-2021-3.0-0235NessusPhotonOS Local Security Checks
high