CVE-2020-12271

CVE-2020-12271 is a critical-severity (CVSS 9.8) vulnerability in Sophos SFOS. CISA added it to the Known Exploited Vulnerabilities catalog on November 3, 2021, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by May 3, 2022. CISA also lists it as known to be used in ransomware campaigns, so it should be prioritised accordingly. Sophos has 7 vulnerabilities in the KEV catalog, 2 of them linked to ransomware.

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)

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

• https://community.sophos.com/kb/en-us/135412
• https://cwe.mitre.org/data/definitions/89.html
• https://news.sophos.com/en-us/2020/04/26/asnarok/
• https://community.sophos.com/kb/en-us/135412
• https://cwe.mitre.org/data/definitions/89.html
• https://news.sophos.com/en-us/2020/04/26/asnarok/
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-12271