CVE-2021-22894: Ivanti Pulse Connect Secure Collaboration Suite Buffer Overflow Vulnerability

Vulnerability summary

CVE-2021-22894 is a high (CVSS 9.0) Code Injection vulnerability in Ivanti Pulse Connect Secure. It is known to be exploited: CISA lists it, first on 03-11-2021. EPSS estimates a 41.28% chance of exploitation in the next 30 days, higher than 98.6% of scored vulnerabilities.

Timeline

1. 27-05-2021
   PublishedVulnerability first disclosed.
2. 03-11-2021
   Added to CISA KEVIvanti Pulse Connect Secure Collaboration Suite Buffer Overflow Vulnerability
3. 03-05-2022
   CISA remediation dueApply updates per vendor instructions.
4. 21-10-2025
   Last modifiedVulnerability information updated.

Description

A buffer overflow vulnerability exists in Pulse Connect Secure before 9.1R11.4 allows a remote authenticated attacker to execute arbitrary code as the root user via maliciously crafted meeting room.

• CWE-94Improper Control of Generation of Code ('Code Injection')The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.
• CWE-119Improper Restriction of Operations within the Bounds of a Memory BufferThe product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.