CVE-2021-39615
D-Link DSR-500N Authentication Backdoor
Description
D-Link DSR-500N version 1.02 contains hard-coded credentials for undocumented user accounts in the '/etc/passwd' file.If an attacker succeeds in recovering the cleartext password of the identified hash value, he will be able to log in via SSH or Telnet and thus gain access to the underlying embedded Linux operating system on the device. Fixed in version 2.12/2. NOTE: This vulnerability only affects products that are no longer supported by the maintainer
INFO
Published Date :
Aug. 23, 2021, 10:15 p.m.
Last Modified :
Aug. 4, 2024, 3:15 a.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
5.9
Exploitability Score :
3.9
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-2021-39615.
| URL | Resource |
|---|---|
| https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10235 | Vendor Advisory |
| https://www.dlink.com/en/security-bulletin/ | Vendor Advisory |
| https://www.nussko.com/advisories/advisory-2021-08-02.txt | Exploit Third Party 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-2021-39615 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-39615 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 [email protected]
Aug. 04, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
May. 17, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
Apr. 11, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
Mar. 21, 2024
Action Type Old Value New Value Added Tag MITRE unsupported-when-assigned -
CVE Modified by [email protected]
Nov. 07, 2023
Action Type Old Value New Value Changed Description ** UNSUPPORTED WHEN ASSIGNED ** D-Link DSR-500N version 1.02 contains hard-coded credentials for undocumented user accounts in the '/etc/passwd' file.If an attacker succeeds in recovering the cleartext password of the identified hash value, he will be able to log in via SSH or Telnet and thus gain access to the underlying embedded Linux operating system on the device. Fixed in version 2.12/2. NOTE: This vulnerability only affects products that are no longer supported by the maintainer. D-Link DSR-500N version 1.02 contains hard-coded credentials for undocumented user accounts in the '/etc/passwd' file.If an attacker succeeds in recovering the cleartext password of the identified hash value, he will be able to log in via SSH or Telnet and thus gain access to the underlying embedded Linux operating system on the device. Fixed in version 2.12/2. NOTE: This vulnerability only affects products that are no longer supported by the maintainer -
Initial Analysis by [email protected]
Aug. 30, 2021
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:C/I:C/A:C) Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Changed Reference Type https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10235 No Types Assigned https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10235 Vendor Advisory Changed Reference Type https://www.dlink.com/en/security-bulletin/ No Types Assigned https://www.dlink.com/en/security-bulletin/ Vendor Advisory Changed Reference Type https://www.nussko.com/advisories/advisory-2021-08-02.txt No Types Assigned https://www.nussko.com/advisories/advisory-2021-08-02.txt Exploit, Third Party Advisory Added CWE NIST CWE-798 Added CPE Configuration AND OR *cpe:2.3:o:dlink:dsr-500n_firmware:1.02:*:*:*:*:*:*:* OR cpe:2.3:h:dlink:dsr-500n:-:*:*:*:*:*:*:*
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-39615 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-2021-39615
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.68 }} 0.19%
score
0.80231
percentile