Critical severity · published Jun 18, 2020
CVE-2020-11503
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
9.8
CVSS
1.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.4% · higher than 73% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FI
Firewall · Sophos
before 17.5; 17.5; 17.5; 17.5; 17.5; 17.5; +7 more · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-11503
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-11503
Vendor Advisory
https://community.sophos.com/b/security-blog/posts/advisory-potential-rce-through-heap-overflow-in-awarrensmtp-cve-2020-11503
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