9.8
CRITICAL
CVE-2020-14934
Contiki-NG SNMP Agent Buffer Overflow Vulnerability
Description

Buffer overflows were discovered in Contiki-NG 4.4 through 4.5, in the SNMP agent. The function parsing the received SNMP request does not verify the input message's requested variables against the capacity of the internal SNMP engine buffer. If the number of variables in the request exceeds the allocated buffer, a memory write out of the buffer boundaries occurs. This write operation provides a possibility to overwrite other variables allocated in the .bss section by the application. Because the sender of the frame is in control of the content that will be written beyond the buffer limits, and there is no strict process memory separation, this issue may allow overwriting of sensitive memory areas of an IoT device.

INFO

Published Date :

Aug. 18, 2020, 5:15 p.m.

Last Modified :

Aug. 25, 2020, 8:04 p.m.

Remotely Exploitable :

Yes !

Impact Score :

5.9

Exploitability Score :

3.9
Affected Products

The following products are affected by CVE-2020-14934 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 Contiki-ng contiki-ng
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-2020-14934.

URL Resource
https://drive.google.com/file/d/1NIf0Y0S47Lu85uSi29kt9tgSh0jYZYfj/view?usp=sharing Third Party Advisory
https://github.com/contiki-ng/contiki-ng/issues/1352 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-2020-14934 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2020-14934 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
  • Initial Analysis by [email protected]

    Aug. 25, 2020

    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:H/I:H/A:H
    Changed Reference Type https://drive.google.com/file/d/1NIf0Y0S47Lu85uSi29kt9tgSh0jYZYfj/view?usp=sharing No Types Assigned https://drive.google.com/file/d/1NIf0Y0S47Lu85uSi29kt9tgSh0jYZYfj/view?usp=sharing Third Party Advisory
    Changed Reference Type https://github.com/contiki-ng/contiki-ng/issues/1352 No Types Assigned https://github.com/contiki-ng/contiki-ng/issues/1352 Exploit, Third Party Advisory
    Added CWE NIST CWE-787
    Added CPE Configuration OR *cpe:2.3:o:contiki-ng:contiki-ng:*:*:*:*:*:*:*:* versions from (including) 4.4 up to (including) 4.5
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-2020-14934 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-2020-14934 weaknesses.

Exploit Prediction

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

0.42 }} 0.09%

score

0.74519

percentile

CVSS31 - Vulnerability Scoring System
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