The Patching Friars' AlmanacA calendar of CVE saints

January 12

ShitrixHoly card for shitrix, generated with AI (Claude, Anthropic) for the Lunario dei Frati Patchatori.CC BY-NC-SA 4.0 ../ root Shitrix PER ASPERA AD ROOT
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⚔ Commemorated today: The Scourge of Aurora (2010)

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Saint Shitrix, the Name Says It All

Patron of exposed NetScalers, temporary mitigations that last for months, and whoever names vulnerabilities.

Life

Announced by Citrix in December 2019 with a mitigation but no patch, he exploded in January 2020 with the first public exploits. A well-placed ../ was enough to climb out of the right folder and run code on the gateways guarding half the corporate internet. Researcher Kevin Beaumont gave him the name he went down in history with.

Prayer

O Saint Shitrix, who climbs folders one ../ at a time, grant us patches before exploits and not the other way round. Amen.

How to celebrate

Celebrated by hunting for suspicious XML files among the templates and answering 'yes, we're patched' with less and less conviction.

One ../ leads to another, and soon you're root.

Technical record

Disclosed on
January 12 2020
CVE
CVE-2019-19781
CVSS
9.8Actively exploited (CISA KEV)
Product
Citrix · Application Delivery Controller (ADC), Gateway, and SD-WAN WANOP Appliance

An issue was discovered in Citrix Application Delivery Controller (ADC) and Gateway 10.5, 11.1, 12.0, 12.1, and 13.0. They allow Directory Traversal.

Sources: badpackets.net · web.archive.org · zdnet.com

Commemorated today

Also remembered today

Shortcuts: ← → to move, D day, W week, M month, T today.

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SaintsGoogle CalendarApple, Outlook (.ics)

Observances (feasts, scourges and miracles)Google CalendarApple, Outlook (.ics)

In Google Calendar you can also paste the URL in Settings → Add calendar → From URL. The first sync can take a few hours.