CVE-2020-7461
FreeBSD Dhclient Remotely Exploitable Heap Overflow
Description
In FreeBSD 12.1-STABLE before r365010, 11.4-STABLE before r365011, 12.1-RELEASE before p9, 11.4-RELEASE before p3, and 11.3-RELEASE before p13, dhclient(8) fails to handle certain malformed input related to handling of DHCP option 119 resulting a heap overflow. The heap overflow could in principle be exploited to achieve remote code execution. The affected process runs with reduced privileges in a Capsicum sandbox, limiting the immediate impact of an exploit.
INFO
Published Date :
March 26, 2021, 9:15 p.m.
Last Modified :
Sept. 16, 2021, 4:03 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
3.4
Exploitability Score :
3.9
Public PoC/Exploit Available at Github
CVE-2020-7461 has a 3 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-2020-7461
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-2020-7461.
| URL | Resource |
|---|---|
| https://cert-portal.siemens.com/productcert/pdf/ssa-288459.pdf | Third Party Advisory |
| https://security.FreeBSD.org/advisories/FreeBSD-SA-20:26.dhclient.asc | 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).
Reproducer PoC for FreeBSD dhclient heap-based buffer overflow vulnerability when parsing DHCP option 119 (CVE-2020-7461)
Python
None
PoC for DHCP vulnerability (NAME:WRECK) in FreeBSD
Python
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2020-7461 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2020-7461 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]
May. 14, 2024
Action Type Old Value New Value -
Modified Analysis by [email protected]
Sep. 16, 2021
Action Type Old Value New Value Changed Reference Type https://cert-portal.siemens.com/productcert/pdf/ssa-288459.pdf No Types Assigned https://cert-portal.siemens.com/productcert/pdf/ssa-288459.pdf Third Party Advisory Added CPE Configuration AND OR *cpe:2.3:o:siemens:simatic_rf350m_firmware:*:*:*:*:*:*:*:* OR cpe:2.3:h:siemens:simatic_rf350m:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:siemens:simatic_rf650m_firmware:*:*:*:*:*:*:*:* OR cpe:2.3:h:siemens:simatic_rf650m:-:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Sep. 14, 2021
Action Type Old Value New Value Added Reference https://cert-portal.siemens.com/productcert/pdf/ssa-288459.pdf [No Types Assigned] -
Initial Analysis by [email protected]
Apr. 02, 2021
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:P/I:P/A:P) Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L Changed Reference Type https://security.FreeBSD.org/advisories/FreeBSD-SA-20:26.dhclient.asc No Types Assigned https://security.FreeBSD.org/advisories/FreeBSD-SA-20:26.dhclient.asc Vendor Advisory Added CWE NIST CWE-787 Added CPE Configuration OR *cpe:2.3:o:freebsd:freebsd:11.3:-:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:11.3:p1:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:11.3:p10:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:11.3:p11:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:11.3:p12:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:11.3:p2:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:11.3:p3:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:11.3:p4:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:11.3:p5:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:11.3:p6:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:11.3:p7:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:11.3:p8:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:11.3:p9:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:11.4:-:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:11.4:p1:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:11.4:p2:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:12.1:-:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:12.1:p1:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:12.1:p2:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:12.1:p3:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:12.1:p4:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:12.1:p5:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:12.1:p6:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:12.1:p7:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:12.1:p8:*:*:*:*:*:*
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2020-7461 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-2020-7461
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.48 }} 0.14%
score
0.75868
percentile