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Exploited vulnerability · CISA KEV

Is CVE-2019-3398 exploited? Yes: in CISA KEV since 3 Nov 2021

Gociux · Atlassian Confluence Server and Data Center · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2019-3398, Atlassian Confluence Server and Data Center Path Traversal Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 3 Nov 2021, 930 days after it was published. It affects Atlassian Confluence Server and Data Center. 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
severity8.8CVSS 3.1 · high
US federal due3 May 2022BOD 22-01 deadline

What it is

Atlassian Confluence Server and Data Center contain a path traversal vulnerability in the downloadallattachments resource that may allow a privileged, remote attacker to write files. Exploitation can lead to remote code execution.

VendorAtlassian (14 exploited CVEs in KEV)
ProductConfluence Server and Data Center
VulnerabilityAtlassian Confluence Server and Data Center Path Traversal Vulnerability
WeaknessCWE-22
Published18 Apr 2019
Added to KEV3 Nov 2021
Reported by (CNA)atlassian

What to do

  1. Check whether you run it. Look for Confluence Server and Data Center in your asset inventory, including appliances and cloud images. Stack check lists every exploited Atlassian 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 18 Apr 2019.
  4. Get told next time. Email alerts when CISA adds a CVE for Atlassian.

Other exploited CVEs in Confluence Server and Data Center

References

Questions

Is CVE-2019-3398 being exploited?

Yes. CISA added CVE-2019-3398 to the Known Exploited Vulnerabilities catalog on 3 Nov 2021, which means there is reliable evidence of exploitation in the wild.

Is CVE-2019-3398 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-2019-3398?

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

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