Exploited vulnerability · CISA KEV

Is CVE-2019-8394 exploited? Yes: in CISA KEV since 3 Nov 2021

Gociux · Zoho ManageEngine · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2019-8394, Zoho ManageEngine ServiceDesk Plus (SDP) File Upload Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 3 Nov 2021, 990 days after it was published. It affects Zoho ManageEngine. If you run it, CISA's required action is: Apply updates per vendor instructions.

exploitedYesCISA KEV · 3 Nov 2021

ransomwareNot knownno confirmed use

EPSStop 1%among the most likely CVEs to be exploited

severity7.5CVSS 3.1 · high

US federal due3 May 2022BOD 22-01 deadline

What it is

Zoho ManageEngine ServiceDesk Plus (SDP) contains an unspecified vulnerability that allows remote users to upload files via login page customization.

Vendor	Zoho (9 exploited CVEs in KEV)
Product	ManageEngine
Vulnerability	Zoho ManageEngine ServiceDesk Plus (SDP) File Upload Vulnerability
Weakness	CWE-434
Published	17 Feb 2019
Added to KEV	3 Nov 2021
Reported by (CNA)	mitre

What to do

Check whether you run it. Look for ManageEngine in your asset inventory, including appliances and cloud images. Stack check lists every exploited Zoho CVE at once.
Apply the fix. Apply updates per vendor instructions.
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 17 Feb 2019.
Get told next time. Email alerts when CISA adds a CVE for Zoho.

Other exploited CVEs in ManageEngine

CVE-2022-28810: Zoho ManageEngine ADSelfService Plus Remote Code Execution Vulnerability (7 Mar 2023)
CVE-2022-47966: Zoho ManageEngine Multiple Products Remote Code Execution Vulnerability (23 Jan 2023)
CVE-2022-35405: Zoho ManageEngine Multiple Products Remote Code Execution Vulnerability (22 Sep 2022)
CVE-2021-40539: Zoho ManageEngine ADSelfService Plus Authentication Bypass Vulnerability (3 Nov 2021)
CVE-2020-10189: Zoho ManageEngine Desktop Central File Upload Vulnerability (3 Nov 2021)

References

nvd.nist.gov/vuln/detail/CVE-2019-8394

Questions

Is CVE-2019-8394 being exploited?

Yes. CISA added CVE-2019-8394 to the Known Exploited Vulnerabilities catalog on 3 Nov 2021, which means there is reliable evidence of exploitation in the wild.

Is CVE-2019-8394 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-2019-8394?

Apply updates per vendor instructions. Check Zoho's advisory for the fixed versions, and if you can't patch quickly, restrict access to the affected ManageEngine 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 · Zoho scorecard · act-now radar.

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