What is CVE-2020-12271?

CVE-2020-12271 is a critical-severity vulnerability in Sophos Sfos, classified under SQL Injection. CVSS score: 9.8/10. Published 2020-04-27.

How severe is CVE-2020-12271?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2020-12271 known to be exploited?

Yes. CVE-2020-12271 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2021-11-03), indicating it is being actively exploited. 8 public proof-of-concept repositories are indexed.

SQL Injection in Sophos Sfos

CVE-2020-12271

A SQL injection issue was found in SFOS 17.0, 17.1, 17.5, and 18.0 before 2020-04-25 on Sophos XG Firewall devices, as exploited in the wild in April 2020. This affected devices configured with either the administration (HTTPS) service or the User Portal exposed on the WAN zone. A successful attack may have caused remote code execution that exfiltrated usernames and hashed passwords for the local device admin(s), portal admins, and user accounts used for remote access (but not external Active Directory or LDAP passwords)

Vulnerability class: SQL Injection

EPSS: 0.424 (98.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Sophos Sfos — versions 17.0, 17.1, 17.5
Sophos Xg_firewall
N/a — versions n/a

Weakness classification (CWE)

CWE-89 — SQL Injection

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on 2021-11-03. CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.

BOD 22-01 due date: 2022-05-03.

Required action: Apply updates per vendor instructions.

Known ransomware campaign use: yes.

Public proof-of-concept exploits

References

cve@mitre.org (Third Party Advisory, x_refsource_MISC)
cve@mitre.org (x_refsource_MISC, Vendor Advisory)
cve@mitre.org (Exploit, x_refsource_MISC, Vendor Advisory)
134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)

Frequently asked questions

What is CVE-2020-12271?: CVE-2020-12271 is a critical-severity vulnerability in Sophos Sfos, classified under SQL Injection. CVSS score: 9.8/10. Published 2020-04-27.
How severe is CVE-2020-12271?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2020-12271 known to be exploited?: Yes. CVE-2020-12271 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2021-11-03), indicating it is being actively exploited. 8 public proof-of-concept repositories are indexed.