CVE-2021-39856
Adobe Acrobat Reader DC ActiveX Control Information Disclosure
Description
Acrobat Reader DC ActiveX Control versions 2021.005.20060 (and earlier), 2020.004.30006 (and earlier) and 2017.011.30199 (and earlier) are affected by an Information Disclosure vulnerability. An unauthenticated attacker could leverage this vulnerability to obtain NTLMv2 credentials. Exploitation of this issue requires user interaction in that a victim must visit an attacker controlled web page.
INFO
Published Date :
Sept. 29, 2021, 4:15 p.m.
Last Modified :
Nov. 21, 2024, 6:20 a.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
3.6
Exploitability Score :
2.8
Affected Products
The following products are affected by CVE-2021-39856
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.
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-2021-39856.
| URL | Resource |
|---|---|
| https://helpx.adobe.com/security/products/acrobat/apsb21-55.html | Release Notes Vendor Advisory |
| https://helpx.adobe.com/security/products/acrobat/apsb21-55.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).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-39856 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-39856 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://helpx.adobe.com/security/products/acrobat/apsb21-55.html -
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Modified Analysis by [email protected]
Feb. 05, 2022
Action Type Old Value New Value -
CVE Modified by [email protected]
Jan. 28, 2022
Action Type Old Value New Value Removed CVSS V3.1 Adobe Systems Incorporated AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N Added CVSS V3.1 Adobe Systems Incorporated AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N Removed CVSS V3.1 Reason AC-No Race Condition Removed CVSS V3.1 Reason C-No limiting factors -
Initial Analysis by [email protected]
Oct. 07, 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:N/A:N) Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N Changed Reference Type https://helpx.adobe.com/security/products/acrobat/apsb21-55.html No Types Assigned https://helpx.adobe.com/security/products/acrobat/apsb21-55.html Release Notes, Vendor Advisory Added CPE Configuration AND OR *cpe:2.3:a:adobe:acrobat:*:*:*:*:classic:*:*:* versions from (including) 17.011.30059 up to (including) 17.011.30199 *cpe:2.3:a:adobe:acrobat_reader:*:*:*:*:classic:*:*:* versions from (including) 17.011.30059 up to (including) 17.011.30199 OR cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:* cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:a:adobe:acrobat:*:*:*:*:classic:*:*:* versions from (including) 20.001.30005 up to (including) 20.004.30006 *cpe:2.3:a:adobe:acrobat_reader:*:*:*:*:classic:*:*:* versions from (including) 20.001.30005 up to (including) 20.004.30006 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) 21.005.20058 *cpe:2.3:a:adobe:acrobat_reader_dc:*:*:*:*:continuous:*:*:* versions from (including) 15.008.20082 up to (including) 21.005.20058 OR cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:a:adobe:acrobat_dc:*:*:*:*:continuous:*:*:* versions from (including) 15.008.20082 up to (including) 21.005.20060 *cpe:2.3:a:adobe:acrobat_reader_dc:*:*:*:*:continuous:*:*:* versions from (including) 15.008.20082 up to (including) 21.005.20060 OR cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-39856 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-2021-39856
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.22 }} -0.09%
score
0.59859
percentile