CVEs / CVE-2023-1671
CVE-2023-1671: Sophos Web Appliance Command Injection Vulnerability
- Known exploited in the CISA KEV catalog since 16 Nov 2023
- critical 9.8 CVSS 3.1 (NVD)
- EPSS 99.9% chance of exploitation in the next 30 days, higher than 99% of CVEs (30 Oct 2026)
- Last changed at its sources
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Summary
Sophos Web Appliance contains a command injection vulnerability in the warn-proceed handler that allows for remote code execution.
Description
A pre-auth command injection vulnerability in the warn-proceed handler of Sophos Web Appliance older than version 4.3.10.4 allows execution of arbitrary code.
Affected and fixed versions
| Product | Affected | Fixed in |
|---|---|---|
| Sophos Sophos Web Appliance | from unspecified, before 4.3.10.4 | 4.3.10.4 |
Exploitation
| In CISA KEV since | 16 Nov 2023 |
|---|---|
| Due date for US federal agencies | 7 Dec 2023 |
| Used in ransomware campaigns | Unknown |
| Required action | Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. |
Severity
| CVSS 3.1 | 9.8 criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HScored by NVD |
|---|---|
| Weakness | CWE-77 |
References
- CVE-2023-1671 on NVD
- CVE-2023-1671 in the CISA KEV catalog
- https://www.sophos.com/en-us/security-advisories/sophos-sa-20230404-swa-rce (cited by CISA)
- http://packetstormsecurity.com/files/172016/Sophos-Web-Appliance-4.3.10.4-Command-Injection.html Exploit, Third Party Advisory, VDB Entry
- https://www.sophos.com/en-us/security-advisories/sophos-sa-20230404-swa-rce Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-1671 US Government Resource
Sources
Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.
This product uses data from the NVD API but is not endorsed or certified by the NVD.