CVE-2020-8196KEV · OVERDUECWE-284

Citrix ADC, Gateway, and SD-WAN WANOP Appliance Information Disclosure Vulnerability

Medium · published July 10, 2020

Patch now

The score understates this — it's already being exploited

CVSS calls it medium at 4.3. It is confirmed in active exploitation. It sits in the 98.0th percentile for exploit probability.

1634
days past CISA
deadline
CVSS v3.1
4.3
EPSS
26%
Percentile
98.0
In the wild
Confirmed
What it is

⚠️ A few sneaky lines of code are exposing sensitive data, allowing low-privileged users to access information they shouldn't! Think of it as a restaurant where the staff accidentally leaves the back door unlocked, letting anyone with a badge peek into the storage room — not a full buffet, but still a dangerous sneak peek! With this vulnerability, an attacker could exploit the improper access control to gain insights or information that could be used for further attacks or espionage. While it may not seem catastrophic, any unauthorized insight into your system can lead to bigger troubles down the line!

Put simply

Think of it as a restaurant where the staff accidentally leaves the back door unlocked, letting anyone with a badge peek into the storage room — not a full buffet, but still a dangerous sneak peek! This issue arises from inadequate restrictions on user access in Citrix ADC and Citrix Gateway, as well as Citrix SDWAN WAN-OP, allowing low-privileged users to access sensitive data. It's a classic case of permissions not being properly enforced.

What to do

With this vulnerability, an attacker could exploit the improper access control to gain insights or information that could be used for further attacks or espionage. While it may not seem catastrophic, any unauthorized insight into your system can lead to bigger troubles down the line! Update to the fixed versions: 13.0-58.30, 12.1-57.18, 12.0-63.21, 11.1-64.14, 10.5-70.18 for Citrix ADC and Gateway. For SDWAN, upgrade to 11.1.1a, 11.0.3d, or 10.2.7. Be sure to audit your access control policies to prevent future leaks! You've got this! Patch those systems and lock down your data! 🛡️

The record
Technical detail
CVSS v3.1
4.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.26333 · 98.0th percentile
Weakness
CWE-284 · Improper Access Control
Published
2020-07-10T15:39Z
KEV added
2021-11-03 · due 2022-05-03
EPSS history
Timeline
  • 03 NOV 00:00Z
    Added to CISA KEV — remediate by May 3
    kev
  • 10 JUL 15:39Z
    Improper access control in Citrix ADC and Citrix Gateway versions before 13.0-58.30, 12.1-57.18, 12.0-63.21, 11.1-64.14 and 10.5-70.18 and Citrix SDWAN WAN-OP…
    cvelistv5