VERY Serious Cisco ASA Firewall Vuln - Patch ASAP

Cisco announced on Wednesday afternoon a very serious, newly-discovered vulnerability that affects their entire ASA firewall line. The vulnerability is triggered by specifically-crafted packets directed at the VPN service running on the firewall, specifically the IKE (Internet Key Exchange) protocol (usually running on UDP port 500). The attacker can embed commands within the exploit packets to potentially run arbitrary code on the system and gain total control of the firewall. Alternatively, exploit attempts could cause the firewall to shut down and restart.

http://www.pcworld.com/article/3032497/critical-vpn-key-exchange-flaw-exposes-cisco-security-appliances-to-remote-hacking.html

This vulnerability, CVE-2016-1287, has a CVSS (Common Vulnerability Scoring System) rating of 10.0, the highest possibly rating. Also, SANS' Internet Storm Center states that there is significant active scanning already taking place by hackers in an effort exploit vulnerable Cisco firewalls. If you are unable to update immediately, shutting down the VPN service may prevent exploitation of this vulnerability.

https://isc.sans.edu/diary/Critical+Cisco+ASA+IKEv2v2+Vulnerability.+Active+Scanning+Detected/20719
​
Cisco has a patch available, and anyone using Cisco firewalls (estimated at over one million installed base) is advised to patch as soon as possible. Also, we recommend checking out the logs on your firewall for IKE attempts, or even filtering out IKE (UDP port 500) at your boundary routers (if they are outside the firewall) if you are not using the VPN service on your ASA firewall.

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160210-asa-ike

Comments

Post a Comment

Popular posts from this blog

Weekly Infosec News Brief: 14-20 March

Image
Major Media Websites Caught up inNew Malicious Advertising Attacks Last week multiple major advertising networks, including Google's DoubleClick, AppNexus, Rubicon, and AOL were abused by attackers to serve up malicious advertisements on major media sites. These malicious advertisements were redirecting to the "Angler" exploit kit, which uses multiple means to attempt to compromise a browser and install malware. While such malicious ads are common on smaller websites, they are not unheard-of on major media sites. This outbreak, however, was unusually large and long-lived, lasting at least the better part of two days. Given how common malicious web ads are, some security experts are recommending the use of ad blocking technology in web browsers. http://www.computerworld.com/article/3044565/security/advertising-based-cyberattacks-hit-bbc-new-york-times-msn.html Malicious Macros in Word Documents Used to Install Malware with No Files Needed Everything old is new a
Read more

Weekly Infosec News Brief 20-26 July

Image
FBI Sees Massive Increase in Espionage, Including Industrial Espionage, Against the US The FBI on Thursday issued a press release discussing what they believe is an increasing threat of economic espionage against US companies. They estimate that such espionage may cost the US as much as "hundreds of billions" of dollars a year. This espionage is not just directed against large industrial companies, but any place where trade secrets and innovations might be found, including third-party organizations (e.g. business partners, vendors, consultants, lawyers, etc.) affiliated with targeted companies. A key take-away is that the threat is more widespread than most people think, and that few organizations are immune. https://www.fbi.gov/news/pressrel/press-releases/fbi-announces-economic-espionage-awareness-campaign http://www.cnn.com/2015/07/24/politics/fbi-economic-espionage/ Microsoft Releases Out-of-Cycle Patch for Critical Font Driver Bug A flaw uncovered in connecti
Read more

Weekly Infosec News Brief: 22-28 February

Image
Ransomware Observed to Jump from One Device to Another via the Cloud Researchers described last week an incident where they observed malicious "ransomware" propagating from one device to another via cloud-based file synchronization. When the ransomware encrypted files on one machine that synchronized files to a specific folder, it spread to other PCs that synchronized to that same folder. This type of phenomenon is simply another reason for organizations to serious consider limiting or eliminating the use of such file-synchronizing software within their networks. http://www.scmagazine.com/researchers-confirm-cases-of-ransomware-encryption-jumping-devices-via-cloud-apps/article/479572/ New OpenSSL Patches Soon to Come The OpenSSL project team announced last Thursday that they are working on patches to fix at least two "high" severity vulnerabilities in OpenSSL. This is the software that powers the cryptographic security layer of many web servers, browser
Read more