CVE-2023-1671

Sophos Web Appliance: Command Injection

As of , CVE-2023-1671 in Sophos Web Appliance is on CISA's list of exploited vulnerabilities: CISA listed it on . Our patch-first group: Patch this week.

Exploited
Yes: CISA listed it on 16 November 2023
US federal deadline
7 December 202321 days after CISA listed it. US federal civilian agencies must fix it by then.
Used in ransomware campaigns
Not known to CISA
EPSS score
0.99Higher than 99% of the CVEs EPSS scores. EPSS estimates the chance of exploitation activity in the next 30 days.
EPSS when listed
0.36 on 16 November 2023EPSS on the day CISA listed it.
Public exploit
1 Exploit-DB entry
Fix
Vendor advice: www.sophos.comLinks below, from CISA's entry.

What CISA says to do

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

CISA's required action

What the flaw is

Sophos Web Appliance contains a command injection vulnerability in the warn-proceed handler that allows for remote code execution.

CISA's 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.

The CVE record's description, from Sophos

CVE published
4 April 2023
Assigned by
Sophos
CVSS
9.8 Critical (CVSS 3.1, from the CNA)
CWE-77
Improper Neutralization of Special Elements used in a Command ('Command Injection')
CISA SSVC, exploitation
active
CISA SSVC, automatable
yes
CISA SSVC, technical impact
total

Timeline

  1. The CVE record was published.
  2. Exploit-DB published an exploit (EDB-ID 51396).
  3. CISA added it to its list of exploited vulnerabilities.
  4. The US federal deadline to fix it.

Public exploits

Facts from Metasploit's module list and Exploit-DB's index; we never copy exploit code.

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