Rejetto HTTP File Server Improper Neutralization of Special Elements Used in a Template Engine Vulnerability

[ Why it matters ]Priority signals

• Exploited in the wild: on CISA's Known Exploited Vulnerabilities list since 2024-07-09
• Known to be used in ransomware campaigns
• EPSS: 99% chance of exploitation in the next 30 days (higher than 100% of CVEs)
• Critical severity: CVSS 9.8

[ Description ]Official description

Rejetto HTTP File Server, up to and including version 2.3m, is vulnerable to a template injection vulnerability. This vulnerability allows a remote, unauthenticated attacker to execute arbitrary commands on the affected system by sending a specially crafted HTTP request. As of the CVE assignment date, Rejetto HFS 2.3m is no longer supported.

CISA: Rejetto HTTP File Server contains an improper neutralization of special elements used in a template engine vulnerability. This allows a remote, unauthenticated attacker to execute commands on the affected system by sending a specially crafted HTTP request.

[ Fixes ]Fixes and patches

CISA required action (US federal deadline 30 Jul 2024): Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

• Patch on github.comVendor patch or bulletin · NVD · Reference tagged 'Patch' by NVD

[ References ]References

• github.com/rapid7/metasploit-framework/pull/19240ExploitIssue TrackingPatch
• mohemiv.com/all/rejetto-http-file-server-2-3m-unauthenticated-rceExploit
• vulncheck.com/advisories/rejetto-unauth-rceThird Party Advisory
• www.vicarius.io/vsociety/posts/cve-2024-23692-detect-rejetto-hfs-vulnerabilityExploitThird Party Advisory
• www.vicarius.io/vsociety/posts/cve-2024-23692-rejetto-hfs-mitigate-vulnerabilityExploitThird Party Advisory
• www.vicarius.io/vsociety/posts/unauthenticated-rce-flaw-in-rejetto-http-file-server-cve…ExploitThird Party Advisory
• www.cisa.gov/known-exploited-vulnerabilities-catalogUS Government Resource