CVE-2021-29221

low-risk
Published 2021-04-09

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.

Do I need to act?

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0.04% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
7
CVSS 7.0/10 High
LOCAL / HIGH complexity

Affected Products (1)

Affected Vendors

Erlang

References (4)

Exploit https://deepsurface.com/deepsurface-security-advisory-local-privilege-escalation...
Third Party Advisory https://github.com/erlang/otp/releases/tag/OTP-23.2.3
Exploit https://deepsurface.com/deepsurface-security-advisory-local-privilege-escalation...
Third Party Advisory https://github.com/erlang/otp/releases/tag/OTP-23.2.3
23
/ 100
low-risk
Severity 18/34 · Moderate
Exploitability 0/34 · Minimal
Exposure 5/34 · Minimal