Cisco Adaptive Security Appliance (ASA) CLI Remote Code Execution Vulnerability

[ Why it matters ]Priority signals

• Exploited in the wild: on CISA's Known Exploited Vulnerabilities list since 2022-05-24
• EPSS: 23% chance of exploitation in the next 30 days (higher than 98% of CVEs)

[ Description ]Official description

Cisco Adaptive Security Appliance (ASA) Software before 8.4(1) on ASA 5500, ASA 5500-X, PIX, and FWSM devices allows local users to gain privileges via invalid CLI commands, aka Bug ID CSCtu74257 or EPICBANANA.

CISA: A vulnerability in the command-line interface (CLI) parser of Cisco ASA software could allow an authenticated, local attacker to create a denial-of-service (DoS) condition or potentially execute code.

[ Fixes ]Fixes and patches

CISA required action (US federal deadline 14 Jun 2022): Apply updates per vendor instructions.

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ References ]References

• blogs.cisco.com/security/shadow-brokersExploitPress/Media CoverageVendor Advisory
• tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160817-asa-cliVendor Advisory
• tools.cisco.com/security/center/viewErp.xVendor Advisory
• www.securityfocus.com/bid/92520Broken LinkThird Party AdvisoryVDB Entry
• www.securitytracker.com/id/1036636Broken LinkThird Party AdvisoryVDB Entry
• github.com/offensive-security/exploit-database-bin-sploits/raw/master/sploits/40271.zipBroken LinkExploit
• www.exploit-db.com/exploits/40271Third Party AdvisoryVDB Entry
• www.cisa.gov/known-exploited-vulnerabilities-catalogUS Government Resource