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CVE-2020-11503 Details

Description

A heap-based buffer overflow in the awarrensmtp component of Sophos XG Firewall v17.5 MR11 and older potentially allows an attacker to run arbitrary code remotely.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:9.8 CRITICALVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://community.sophos.com/b/security-blog/posts/advisory-potential-rce-through-heap-overflow-in-awarrensmtp-cve-2020-11503	CVE	Vendor Advisory
https://community.sophos.com/b/security-blog/posts/advisory-potential-rce-through-heap-overflow-in-awarrensmtp-cve-2020-11503	[email protected]	Vendor Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-787	Out-of-bounds Write	[email protected]

Affected Products

Product	Versions
sophos sfos	< 17.5 17.5 - 17.5 maintenance_release1 17.5 maintenance_release10 17.5 maintenance_release11
CPE cpe:2.3:o:sophos:sfos:::::::: cpe:2.3:o:sophos:sfos:17.5:-:::::: cpe:2.3:o:sophos:sfos:17.5:maintenance_release1:::::: cpe:2.3:o:sophos:sfos:17.5:maintenance_release10:::::: cpe:2.3:o:sophos:sfos:17.5:maintenance_release11:::::: cpe:2.3:o:sophos:sfos:17.5:maintenance_release2:::::: cpe:2.3:o:sophos:sfos:17.5:maintenance_release3:::::: cpe:2.3:o:sophos:sfos:17.5:maintenance_release4:::::: cpe:2.3:o:sophos:sfos:17.5:maintenance_release5:::::: cpe:2.3:o:sophos:sfos:17.5:maintenance_release6:::::: cpe:2.3:o:sophos:sfos:17.5:maintenance_release7:::::: cpe:2.3:o:sophos:sfos:17.5:maintenance_release8:::::: cpe:2.3:o:sophos:sfos:17.5:maintenance_release9:::::: Remediation No remediation found in references.
sophos xg firewall	All versions
CPE cpe:2.3:h:sophos:xg_firewall:-:::::::* Remediation No remediation found in references.

Change History

4 change records found show changes

Date	Action	Recorded By
Jun 17, 2026	CVE Modified	[email protected]
Nov 21, 2024	CVE Modified	CVE
May 14, 2024	CVE Modified	[email protected]
Jun 23, 2020	Initial Analysis	[email protected]