Known Exploited Vulnerability
8.8
HIGH
CVE-2021-28550
Adobe Acrobat and Reader Use-After-Free Vulnerabil - [Actively Exploited]
Description

Acrobat Reader DC versions versions 2021.001.20150 (and earlier), 2020.001.30020 (and earlier) and 2017.011.30194 (and earlier) are affected by a Use After Free vulnerability. An unauthenticated attacker could leverage this vulnerability to achieve arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.

INFO

Published Date :

Sept. 2, 2021, 5:15 p.m.

Last Modified :

July 29, 2024, 6:22 p.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 :

Adobe Acrobat and Reader contains a use-after-free vulnerability that could allow an unauthenticated attacker to achieve code execution in the context of the current user.

Required Action :

Apply updates per vendor instructions.

Public PoC/Exploit Available at Github

CVE-2021-28550 has a 9 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-2021-28550 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 Adobe acrobat_dc
2 Adobe acrobat_reader_dc
3 Adobe acrobat
4 Adobe acrobat_reader
1 Apple macos
1 Microsoft windows
: Total Affected Vendor : 3 | Products : 6
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-2021-28550.

URL Resource
https://helpx.adobe.com/security/products/acrobat/apsb21-29.html Release Notes 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).

Profile Photo
ChalkingCode/ExploitedDucks

A super simple Cisa KEV lookup CLI tool leveraging DuckDB

Python

Updated: 1 month, 2 weeks ago
1 stars 0 fork 0 watcher
Born at : July 2, 2024, 7:56 p.m. This repo has been linked 33 different CVEs too.
Profile Photo
day0xy/malicious-pdf

archive of github.com/jonaslejon/malicious-pdf

Python

Updated: 3 months, 4 weeks ago
1 stars 0 fork 0 watcher
Born at : May 21, 2024, 10:58 a.m. This repo has been linked 2 different CVEs too.
Profile Photo
takumakume/dependency-track-policy-applier

Manage OWASP Dependency-Track policy idempotent.

Makefile Go Dockerfile

Updated: 1 year ago
0 stars 0 fork 0 watcher
Born at : Sept. 1, 2023, 1:22 a.m. This repo has been linked 9 different CVEs too.
Profile Photo
xaitax/cisa-catalog-known-vulnerabilities

None

Python HTML

Updated: 1 month ago
19 stars 0 fork 0 watcher
Born at : Jan. 14, 2023, 8:36 p.m. This repo has been linked 10 different CVEs too.
Profile Photo
eeenvik1/scripts_for_YouTrack

Набор скриптов для парсинга агрегаторов уязвимостей и выгрузки информации в YouTrack

Python

Updated: 1 month, 1 week ago
25 stars 5 fork 5 watcher
Born at : May 17, 2022, 11:34 a.m. This repo has been linked 61 different CVEs too.
Profile Photo
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: 1 week, 5 days ago
516 stars 32 fork 32 watcher
Born at : April 19, 2022, 8:58 a.m. This repo has been linked 1181 different CVEs too.
Profile Photo
dudacgf/ovr_convert

Openvas XML Report Converter is a flask-based microweb page that helps using openvasreporting to convert xml reports exported from Greenbone Security Assistant into xlsx workbooks, docx documents or csv files.

flask openvasreporting dropzone flask-session bootstrap-flask

Python CSS JavaScript HTML

Updated: 2 months, 4 weeks ago
2 stars 0 fork 0 watcher
Born at : Nov. 26, 2021, 2:09 p.m. This repo has been linked 8 different CVEs too.
Profile Photo
jonaslejon/malicious-pdf

💀 Generate a bunch of malicious pdf files with phone-home functionality. Can be used with Burp Collaborator or Interact.sh

penetrationtesting pentesting pentesting-tools penetration-testing penetration-test pdf-generation pdf bugbounty bugbounty-tool python redteam redteaming scanner

Python

Updated: 1 week, 4 days ago
2820 stars 344 fork 344 watcher
Born at : Aug. 17, 2021, 10:10 a.m. This repo has been linked 2 different CVEs too.
Profile Photo
n0-traces/cve_monitor

Automatic monitor github cve using Github Actions

Python

Updated: 2 years, 11 months ago
0 stars 56 fork 56 watcher
Born at : April 7, 2021, 11:16 a.m. This repo has been linked 1007 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-2021-28550 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2021-28550 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.

  • Modified Analysis by [email protected]

    Jul. 29, 2024

    Action Type Old Value New Value
    Changed CPE Configuration AND OR cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* OR *cpe:2.3:a:adobe:acrobat_dc:*:*:*:*:continuous:*:*:* versions from (including) 15.008.20082 up to (including) 21.001.20150 *cpe:2.3:a:adobe:acrobat_reader_dc:*:*:*:*:continuous:*:*:* versions from (including) 15.008.20082 up to (including) 21.001.20150 AND OR *cpe:2.3:a:adobe:acrobat_dc:*:*:*:*:continuous:*:*:* versions from (including) 15.008.20082 up to (including) 21.001.20150 *cpe:2.3:a:adobe:acrobat_reader_dc:*:*:*:*:continuous:*:*:* versions from (including) 15.008.20082 up to (including) 21.001.20150 OR cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*
    Changed CPE Configuration AND OR cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:* cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* OR *cpe:2.3:a:adobe:acrobat:*:*:*:*:classic:*:*:* versions from (including) 17.011.30059 up to (including) 17.011.30194 *cpe:2.3:a:adobe:acrobat:*:*:*:*:classic:*:*:* versions from (including) 20.001.30005 up to (including) 20.001.30020 *cpe:2.3:a:adobe:acrobat_reader:*:*:*:*:classic:*:*:* versions from (including) 17.011.30059 up to (including) 17.011.30194 *cpe:2.3:a:adobe:acrobat_reader:*:*:*:*:classic:*:*:* versions from (including) 20.001.30005 up to (including) 20.001.30020 AND OR *cpe:2.3:a:adobe:acrobat:*:*:*:*:classic:*:*:* versions from (including) 17.011.30059 up to (including) 17.011.30194 *cpe:2.3:a:adobe:acrobat:*:*:*:*:classic:*:*:* versions from (including) 20.001.30005 up to (including) 20.001.30020 *cpe:2.3:a:adobe:acrobat_reader:*:*:*:*:classic:*:*:* versions from (including) 17.011.30059 up to (including) 17.011.30194 *cpe:2.3:a:adobe:acrobat_reader:*:*:*:*:classic:*:*:* versions from (including) 20.001.30005 up to (including) 20.001.30020 OR cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:* cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*
  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • CVE Modified by [email protected]

    Nov. 07, 2023

    Action Type Old Value New Value
    Added CVSS V3 Adobe Systems Incorporated AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
    Removed CVSS V3.1 Adobe Systems Incorporated AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
  • Initial Analysis by [email protected]

    Sep. 15, 2021

    Action Type Old Value New Value
    Added CVSS V2 Metadata Victim must voluntarily interact with attack mechanism
    Added CVSS V2 NIST (AV:N/AC:M/Au:N/C:P/I:P/A:P)
    Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
    Changed Reference Type https://helpx.adobe.com/security/products/acrobat/apsb21-29.html No Types Assigned https://helpx.adobe.com/security/products/acrobat/apsb21-29.html Release Notes, Vendor Advisory
    Added CPE Configuration AND OR *cpe:2.3:a:adobe:acrobat_dc:*:*:*:*:continuous:*:*:* versions from (including) 15.008.20082 up to (including) 21.001.20150 *cpe:2.3:a:adobe:acrobat_reader_dc:*:*:*:*:continuous:*:*:* versions from (including) 15.008.20082 up to (including) 21.001.20150 OR cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:a:adobe:acrobat:*:*:*:*:classic:*:*:* versions from (including) 17.011.30059 up to (including) 17.011.30194 *cpe:2.3:a:adobe:acrobat:*:*:*:*:classic:*:*:* versions from (including) 20.001.30005 up to (including) 20.001.30020 *cpe:2.3:a:adobe:acrobat_reader:*:*:*:*:classic:*:*:* versions from (including) 17.011.30059 up to (including) 17.011.30194 *cpe:2.3:a:adobe:acrobat_reader:*:*:*:*:classic:*:*:* versions from (including) 20.001.30005 up to (including) 20.001.30020 OR cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:* cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:a:adobe:acrobat_dc:*:*:*:*:continuous:*:*:* versions from (including) 15.008.20082 up to (including) 21.001.20150 *cpe:2.3:a:adobe:acrobat_reader_dc:*:*:*:*:continuous:*:*:* versions from (including) 15.008.20082 up to (including) 21.001.20150 OR cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*
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-2021-28550 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-2021-28550 weaknesses.

Exploit Prediction

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

40.92 }} -0.62%

score

0.97354

percentile

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