CVE-2019-12987

Citrix SD-WAN 10.2.x before 10.2.3 and NetScaler SD-WAN 10.0.x before 10.0.8 have Improper Input Validation (issue 3 of 6)

published July 16, 2019

CVSS
—
EPSS
43%
Percentile
98.7
In the wild
Unconfirmed
What it is

⚠️ A vulnerability sneaks into Citrix SD-WAN, waiting for improper input validation to trip up unsuspecting users! Think of it like accepting a delivery without checking the contents — if the courier hands over a package that’s not what you expected, it could contain something hazardous. This vulnerability allows attackers to slip in malformed data without being properly vetted! If an attacker successfully exploits this, they could trick the system into processing malicious input, leading to unexpected behavior or even system crashes. While it might not be an outright breach, the consequences could disrupt services and leave security gaps that could be exploited later.

Put simply

Think of it like accepting a delivery without checking the contents — if the courier hands over a package that’s not what you expected, it could contain something hazardous. This vulnerability allows attackers to slip in malformed data without being properly vetted! This vulnerability in Citrix SD-WAN versions prior to 10.2.3 and NetScaler SD-WAN versions prior to 10.0.8 occurs due to improper input validation, allowing attackers to send specially crafted inputs that the system fails to handle correctly.

What to do

If an attacker successfully exploits this, they could trick the system into processing malicious input, leading to unexpected behavior or even system crashes. While it might not be an outright breach, the consequences could disrupt services and leave security gaps that could be exploited later. To mitigate this vulnerability, update your Citrix SD-WAN to version 10.2.3 or later, and ensure your NetScaler SD-WAN is upgraded to version 10.0.8 or above. Regularly audit your input validation processes to ensure they are robust against unexpected inputs. You've got this! Stay proactive with these updates and keep your network secure! 🛡️

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.42551 · 98.7th percentile
Published
2019-07-16T17:42Z
EPSS history
Timeline
  • 22 SEP 03:17Z
    EPSS moved 43% → 20%
    epss
  • 06 SEP 03:12Z
    EPSS moved 43% → 20%
    epss
  • 30 AUG 16:01Z
    EPSS moved 20% → 43%
    epss
  • 29 AUG 04:46Z
    EPSS moved 43% → 20%
    epss
  • 16 JUL 17:42Z
    Citrix SD-WAN 10.2.x before 10.2.3 and NetScaler SD-WAN 10.0.x before 10.0.8 have Improper Input Validation (issue 3 of 6)
    cvelistv5