{"vulnerability": "cve-2017-12088", "sightings": [{"uuid": "12d8309b-5073-44b7-bd09-7bfdd3dcdc7e", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "2a075640-a300-48a4-bb44-bc6130783b9b", "vulnerability": "CVE-2017-12088", "type": "published-proof-of-concept", "source": "https://t.me/information_security_channel/15495", "content": "The most serious of the flaws, based on their CVSS score of 10, are a series of access control issues that have been assigned a dozen CVE identifiers. A remote and unauthenticated attacker can exploit these vulnerabilities to obtain sensitive information, modify a device\u2019s settings, or change its ladder logic \u2013 all by sending specially crafted packets.\nWhile exploiting many of these flaws requires that the controller\u2019s keyswitch is in REMOTE or PROG position, reading the master password and the master ladder logic works regardless of the keyswitch setting.\nLearn More at SecurityWeek\u2019s ICS Cyber Security Conference\nAnother potentially serious flaw is CVE-2017-12088, which allows a remote attacker to cause the controller to enter a fault state and potentially delete ladder logic by sending specially crafted packets to the Ethernet port.\nDoS vulnerabilities also exist in the device\u2019s program download and firmware update functionality, but these have been assigned only a \u201cmedium severity\u201d rating.\nOther issues considered less serious include a file-write vulnerability affecting a memory module, and a DoS flaw related to the session connection functionality.\nWhile a CVE identifier has been assigned to the session communication bug, Rockwell says the system actually works as intended and no patches or mitigations are required.\nRockwell Automation has released firmware updates that address some of these flaws. The company has also proposed a series of mitigations that include migrating to more recent series of the MicroLogix 1400 controller, setting the keyswitch to \u201cHard Run\u201d to prevent unauthorized changes to the device, and disabling impacted services.\nCisco has published technical details (http://blog.talosintelligence.com/2018/03/ab-micrologix-1400-multiple-vulns.html) and proof-of-concept (PoC) code for each of the vulnerabilities. Rockwell Automation has also released an advisory (https://rockwellautomation.custhelp.com/app/answers/detail/a_id/1072942), but it can only be accessed by registered users.\nThis is not the first time Cisco Talos researchers have found vulnerabilities in MicroLogix 1400 PLCs. In 2016, they reported discovering a weakness that could have been exploited to modify the firmware (https://www.securityweek.com/flaw-allows-attackers-modify-firmware-rockwell-plcs) on these devices.\nRelated: Rockwell Automation Patches Serious Flaw in MicroLogix 1400 PLC (https://www.securityweek.com/rockwell-automation-patches-serious-flaw-micrologix-1400-plc)\nRelated: Several Vulnerabilities Found in Rockwell Automation PLCs (https://www.securityweek.com/several-vulnerabilities-found-rockwell-automation-plcs)\nRelated: Flaws in Rockwell PLCs Expose Operational Networks (https://www.securityweek.com/flaws-rockwell-plcs-expose-operational-networks)", "creation_timestamp": "2018-03-29T09:04:57.000000Z"}]}