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Known exploited vulnerability

CVE-2023-1671

criticalCVSS 3.1 9.8In CISA KEVEPSS 100%Published · Sophos

The short answer

CVE-2023-1671 affects Sophos Sophos Web Appliance and is rated critical (CVSS 9.8). CISA added it to the Known Exploited Vulnerabilities catalog on 2023-11-16: attackers are using it, so patch it first.

What it is

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.

Weakness: CWE-77.

Severity

9.8 critical

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

Exploited (CISA KEV)

Yes, since Nov 16, 2023

Federal due date Dec 7, 2023

EPSS, next 30 days

100%

Higher than 100% of scored CVEs

How it can be exploited

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

What CISA says to do

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

Affected products

Sophos Web Appliance. NVD's record lists the exact affected versions.

References

Questions

Is CVE-2023-1671 being exploited?

Yes. CISA added CVE-2023-1671 to its Known Exploited Vulnerabilities catalog on 2023-11-16, with a federal remediation due date of 2023-12-07.

How do I fix CVE-2023-1671?

CISA's required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Analyzed. The description is NVD's text, quoted as published.

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