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Exploited vulnerability · CISA KEV

Is CVE-2017-16651 exploited? Yes: in CISA KEV since 3 Nov 2021

Gociux · Roundcube Webmail · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2017-16651, Roundcube Webmail File Disclosure Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 3 Nov 2021, 1455 days after it was published. It affects Roundcube Webmail. If you run it, CISA's required action is: Apply updates per vendor instructions.

exploitedYesCISA KEV · 3 Nov 2021
ransomwareNot knownno confirmed use
EPSStop 5%very likely to be exploited
severity7.8CVSS 3.1 · high
US federal due3 May 2022BOD 22-01 deadline

What it is

Roundcube Webmail contains a file disclosure vulnerability caused by insufficient input validation in conjunction with file-based attachment plugins, which are used by default.

VendorRoundcube (11 exploited CVEs in KEV)
ProductRoundcube Webmail
VulnerabilityRoundcube Webmail File Disclosure Vulnerability
WeaknessCWE-552
Published9 Nov 2017
Added to KEV3 Nov 2021
Reported by (CNA)mitre

What to do

  1. Check whether you run it. Look for Roundcube Webmail in your asset inventory, including appliances and cloud images. Stack check lists every exploited Roundcube CVE at once.
  2. Apply the fix. Apply updates per vendor instructions.
  3. If you can't patch today, take the affected service off the internet or restrict who can reach it, and check its logs for signs of compromise since 9 Nov 2017.
  4. Get told next time. Email alerts when CISA adds a CVE for Roundcube.

Other exploited CVEs in Roundcube Webmail

References

Questions

Is CVE-2017-16651 being exploited?

Yes. CISA added CVE-2017-16651 to the Known Exploited Vulnerabilities catalog on 3 Nov 2021, which means there is reliable evidence of exploitation in the wild.

Is CVE-2017-16651 used in ransomware attacks?

CISA does not list known ransomware use for it. That can change, and exploitation alone is reason to fix it first.

How do I fix CVE-2017-16651?

Apply updates per vendor instructions. Check Roundcube's advisory for the fixed versions, and if you can't patch quickly, restrict access to the affected Roundcube Webmail and watch it for signs of compromise.

Sources: CISA KEV (exploitation, ransomware use, required action, due date), the CVE record (publication date, CVSS, CNA), NVD and FIRST EPSS (live score). More: all KEV additions in November 2021 · Roundcube scorecard · act-now radar.

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