Known Exploited Vulnerability
8.8
HIGH
CVE-2021-22894
Ivanti Pulse Connect Secure Collaboration Suite Bu - [Actively Exploited]
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.

INFO

Published Date :

May 27, 2021, 12:15 p.m.

Last Modified :

Nov. 21, 2024, 5:50 a.m.

Source :

[email protected]

Remotely Exploitable :

Yes !

Impact Score :

5.9

Exploitability Score :

2.8
CISA Notification
CISA KEV (Known Exploited Vulnerabilities)

For the benefit of the cybersecurity community and network defenders—and to help every organization better manage vulnerabilities and keep pace with threat activity—CISA maintains the authoritative source of vulnerabilities that have been exploited in the wild.

Description :

Ivanti Pulse Connect Secure Collaboration Suite contains a buffer overflow vulnerabilities that allows a remote authenticated users to execute code as the root user via maliciously crafted meeting room.

Required Action :

Apply updates per vendor instructions.

Notes :

Reference CISA's ED 21-03 (https://www.cisa.gov/news-events/directives/ed-21-03-mitigate-pulse-connect-secure-product-vulnerabilities) for further guidance and requirements. Note: The due date for addressing this vulnerability aligns with the requirements outlined in ED 21-03. https://nvd.nist.gov/vuln/detail/CVE-2021-22894

Public PoC/Exploit Available at Github

CVE-2021-22894 has a 1 public PoC/Exploit available at Github. Go to the Public Exploits tab to see the list.

Affected Products

The following products are affected by CVE-2021-22894 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Pulsesecure pulse_connect_secure
1 Ivanti connect_secure
: Total Affected Vendor : 2 | Products : 2
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2021-22894.

URL Resource
https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44784/?kA23Z000000boUWSAY Vendor Advisory
https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44784/?kA23Z000000boUWSAY Vendor Advisory

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

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Ostorlab/KEV

Ostorlab KEV: One-command to detect most remotely known exploitable vulnerabilities. Sourced from CISA KEV, Google's Tsunami, Ostorlab's Asteroid and Bug Bounty programs.

cisa-kev vulnerability 0day cisa exploits

Updated: 2 weeks, 2 days ago
548 stars 35 fork 35 watcher
Born at : April 19, 2022, 8:58 a.m. This repo has been linked 1228 different CVEs too.

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2021-22894 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2021-22894 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Nov. 21, 2024

    Action Type Old Value New Value
    Added Reference https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44784/?kA23Z000000boUWSAY
  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • Reanalysis by [email protected]

    Jun. 26, 2023

    Action Type Old Value New Value
    Removed CWE NIST CWE-120
    Added CWE NIST CWE-119
  • Reanalysis by [email protected]

    Aug. 30, 2022

    Action Type Old Value New Value
  • Initial Analysis by [email protected]

    Jun. 04, 2021

    Action Type Old Value New Value
    Added CVSS V2 NIST (AV:N/AC:L/Au:S/C:C/I:C/A:C)
    Added CVSS V3.1 NIST AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
    Changed Reference Type https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44784/?kA23Z000000boUWSAY No Types Assigned https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44784/?kA23Z000000boUWSAY Vendor Advisory
    Added CWE NIST CWE-120
    Added CPE Configuration OR *cpe:2.3:a:pulsesecure:pulse_connect_secure:9.0:-:*:*:*:*:*:* *cpe:2.3:a:pulsesecure:pulse_connect_secure:9.0:r1:*:*:*:*:*:* *cpe:2.3:a:pulsesecure:pulse_connect_secure:9.0:r1.0:*:*:*:*:*:* *cpe:2.3:a:pulsesecure:pulse_connect_secure:9.0:r2:*:*:*:*:*:* *cpe:2.3:a:pulsesecure:pulse_connect_secure:9.0:r2.0:*:*:*:*:*:* *cpe:2.3:a:pulsesecure:pulse_connect_secure:9.0:r2.1:*:*:*:*:*:* *cpe:2.3:a:pulsesecure:pulse_connect_secure:9.0:r3:*:*:*:*:*:* *cpe:2.3:a:pulsesecure:pulse_connect_secure:9.0:r3.0:*:*:*:*:*:* *cpe:2.3:a:pulsesecure:pulse_connect_secure:9.0:r3.1:*:*:*:*:*:* *cpe:2.3:a:pulsesecure:pulse_connect_secure:9.0:r3.2:*:*:*:*:*:* *cpe:2.3:a:pulsesecure:pulse_connect_secure:9.0:r3.3:*:*:*:*:*:* *cpe:2.3:a:pulsesecure:pulse_connect_secure:9.0:r3.5:*:*:*:*:*:* *cpe:2.3:a:pulsesecure:pulse_connect_secure:9.0:r4:*:*:*:*:*:* *cpe:2.3:a:pulsesecure:pulse_connect_secure:9.0:r4.0:*:*:*:*:*:* *cpe:2.3:a:pulsesecure:pulse_connect_secure:9.0:r4.1:*:*:*:*:*:* *cpe:2.3:a:pulsesecure:pulse_connect_secure:9.0:r5.0:*:*:*:*:*:* *cpe:2.3:a:pulsesecure:pulse_connect_secure:9.0:r6.0:*:*:*:*:*:* *cpe:2.3:a:pulsesecure:pulse_connect_secure:9.1:-:*:*:*:*:*:* *cpe:2.3:a:pulsesecure:pulse_connect_secure:9.1:r1:*:*:*:*:*:* *cpe:2.3:a:pulsesecure:pulse_connect_secure:9.1:r10.0:*:*:*:*:*:* *cpe:2.3:a:pulsesecure:pulse_connect_secure:9.1:r10.2:*:*:*:*:*:* *cpe:2.3:a:pulsesecure:pulse_connect_secure:9.1:r11.0:*:*:*:*:*:* *cpe:2.3:a:pulsesecure:pulse_connect_secure:9.1:r11.1:*:*:*:*:*:* *cpe:2.3:a:pulsesecure:pulse_connect_secure:9.1:r11.3:*:*:*:*:*:* *cpe:2.3:a:pulsesecure:pulse_connect_secure:9.1:r2:*:*:*:*:*:* *cpe:2.3:a:pulsesecure:pulse_connect_secure:9.1:r3:*:*:*:*:*:* *cpe:2.3:a:pulsesecure:pulse_connect_secure:9.1:r4:*:*:*:*:*:* *cpe:2.3:a:pulsesecure:pulse_connect_secure:9.1:r4.1:*:*:*:*:*:* *cpe:2.3:a:pulsesecure:pulse_connect_secure:9.1:r4.2:*:*:*:*:*:* *cpe:2.3:a:pulsesecure:pulse_connect_secure:9.1:r4.3:*:*:*:*:*:* *cpe:2.3:a:pulsesecure:pulse_connect_secure:9.1:r5:*:*:*:*:*:* *cpe:2.3:a:pulsesecure:pulse_connect_secure:9.1:r6:*:*:*:*:*:* *cpe:2.3:a:pulsesecure:pulse_connect_secure:9.1:r7:*:*:*:*:*:* *cpe:2.3:a:pulsesecure:pulse_connect_secure:9.1:r8:*:*:*:*:*:* *cpe:2.3:a:pulsesecure:pulse_connect_secure:9.1:r8.1:*:*:*:*:*:* *cpe:2.3:a:pulsesecure:pulse_connect_secure:9.1:r8.2:*:*:*:*:*:* *cpe:2.3:a:pulsesecure:pulse_connect_secure:9.1:r8.4:*:*:*:*:*:* *cpe:2.3:a:pulsesecure:pulse_connect_secure:9.1:r9:*:*:*:*:*:* *cpe:2.3:a:pulsesecure:pulse_connect_secure:9.1:r9.1:*:*:*:*:*:* *cpe:2.3:a:pulsesecure:pulse_connect_secure:9.1:r9.2:*:*:*:*:*:* *cpe:2.3:a:pulsesecure:pulse_connect_secure:*:*:*:*:*:*:*:* versions up to (including) 9.1
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2021-22894 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2021-22894 weaknesses.

CAPEC-35: Leverage Executable Code in Non-Executable Files Leverage Executable Code in Non-Executable Files CAPEC-77: Manipulating User-Controlled Variables Manipulating User-Controlled Variables CAPEC-242: Code Injection Code Injection CAPEC-8: Buffer Overflow in an API Call Buffer Overflow in an API Call CAPEC-9: Buffer Overflow in Local Command-Line Utilities Buffer Overflow in Local Command-Line Utilities CAPEC-10: Buffer Overflow via Environment Variables Buffer Overflow via Environment Variables CAPEC-14: Client-side Injection-induced Buffer Overflow Client-side Injection-induced Buffer Overflow CAPEC-24: Filter Failure through Buffer Overflow Filter Failure through Buffer Overflow CAPEC-42: MIME Conversion MIME Conversion CAPEC-44: Overflow Binary Resource File Overflow Binary Resource File CAPEC-45: Buffer Overflow via Symbolic Links Buffer Overflow via Symbolic Links CAPEC-46: Overflow Variables and Tags Overflow Variables and Tags CAPEC-47: Buffer Overflow via Parameter Expansion Buffer Overflow via Parameter Expansion CAPEC-100: Overflow Buffers Overflow Buffers CAPEC-123: Buffer Manipulation Buffer Manipulation
Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.65 }} 0.08%

score

0.79170

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
: