January 22, 2022

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FYI: Someone’s scanning for gateways consisting of those security holes Citrix told you not to stress excessive about

FYI: Someone’s scanning for gateways consisting of those security holes Citrix told you not to stress excessive about
VIdeo This week Citrix tried to reassure everyone the 11 security flaws it just patched in its network perimeter products weren't all that bad. Well, we hope they're right because someone's scanning the internet looking for vulnerable installations. The sweeps could be made by researchers documenting at-risk organizations, or could be miscreants looking for unpatched…

VIdeo This week Citrix attempted to assure everyone the 11 security flaws it just covered in its network border products weren’t all that bad. Well, we hope they’re right due to the fact that somebody’s scanning the internet looking for vulnerable installations.

The sweeps might be made by scientists recording at-risk organizations, or could be wrongdoers searching for unpatched internet-facing equipment to horn in, or both. You probably don’t wish to discover the hard method, so apply fixes as soon as you can.

SANS dean of research Johannes Ullrich today stated his honeypot, established to find exploitation attempts versus bugs in F5’s products, encountered efforts by somebody to make use of a couple of the holes Citrix covered in its gear.

From the logs, it appears the connections were made to identify whether Ullrich’s device was vulnerable, which it wasn’t due to the fact that it wasn’t running the buggy Citrix ADC, Citrix Entrance, or Citrix SD-WAN WANOP software application. Perhaps if the honeypot was susceptible, further exploitation might have been tried. Ullrich thinks the efforts targeted CVE-2020-8195 and CVE-2020-8196, both info disclosure defects.

The Register comprehends the penetrating began soon after Citrix CISO Fermin Serna stated on Tuesday a variety of the bugs had “barriers to exploitation” that would make them unwise to target in the wild.

The very first exploit that hit the honeypot, stated Ullrich, attempted to fetch a file from the entrance, in this case the list of accounts and hashed passwords:

POST/ rapi/filedownload? filter= course:/etc/passwd.

The second exploit attempt tried to bring a PCI DSS compliance file from the server:

POST/ pcidss/report? username= nsroot & set= 1 & type= allprofiles & sid= loginchallengeresponse1requestbody.

” The vulnerability isn’t all that ‘bad’.

You can discover technical details on the Citrix vulnerabilities here, along with proof-of-concept exploits, by Donny Maasland. This code can submit, develop, download, and delete arbitrary files on a susceptible installation, we’re informed.

And listed below is a video demonstrating how the Cross Site Scripting (XSS) defect (CVE-2020-8198) in Citrix’s software application can be abused to gain control over an entrance: a logged-in administrator has to be deceived into clicking a booby-trapped link. ®

Youtube Video

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