Exploited vulnerability · CISA KEV

Is CVE-2019-17558 exploited? Yes: in CISA KEV since 3 Nov 2021

Gociux · Apache Solr · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2019-17558, Apache Solr VelocityResponseWriter Plug-In Remote Code Execution Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 3 Nov 2021, 674 days after it was published. It affects Apache Solr. 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

The Apache Solr VelocityResponseWriter plug-in contains an unspecified vulnerability which can allow for remote code execution.

Vendor	Apache (41 exploited CVEs in KEV)
Product	Solr
Vulnerability	Apache Solr VelocityResponseWriter Plug-In Remote Code Execution Vulnerability
Weakness	CWE-74
Published	30 Dec 2019
Added to KEV	3 Nov 2021
Reported by (CNA)	apache

What to do

Check whether you run it. Look for Solr in your asset inventory, including appliances and cloud images. Stack check lists every exploited Apache 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 30 Dec 2019.
Get told next time. Email alerts when CISA adds a CVE for Apache.

Other exploited CVEs in Solr

CVE-2019-0193: Apache Solr DataImportHandler Code Injection Vulnerability (10 Dec 2021)

References

nvd.nist.gov/vuln/detail/CVE-2019-17558

Questions

Is CVE-2019-17558 being exploited?

Yes. CISA added CVE-2019-17558 to the Known Exploited Vulnerabilities catalog on 3 Nov 2021, which means there is reliable evidence of exploitation in the wild.

Is CVE-2019-17558 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-2019-17558?

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

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