CVE-2021-23386

Remote Memory Exposure

Description

This affects the package dns-packet before 5.2.2. It creates buffers with allocUnsafe and does not always fill them before forming network packets. This can expose internal application memory over unencrypted network when querying crafted invalid domain names.

Category

7.7
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.30%
Third-Party Advisory github.com Third-Party Advisory hackerone.com Third-Party Advisory snyk.io Third-Party Advisory snyk.io
Affected: n/a dns-packet
Published at:
Updated at:

References

Link Tags
https://snyk.io/vuln/SNYK-JS-DNSPACKET-1293563 third party advisory patch
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1295719 third party advisory patch
https://hackerone.com/bugs?subject=user&%3Breport_id=968858 third party advisory permissions required
https://github.com/mafintosh/dns-packet/commit/25f15dd0fedc53688b25fd053ebbdffe3d5c1c56 third party advisory patch

Frequently Asked Questions

What is the severity of CVE-2021-23386?
CVE-2021-23386 has been scored as a high severity vulnerability.
How to fix CVE-2021-23386?
To fix CVE-2021-23386, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-23386 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-23386 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-23386?
CVE-2021-23386 affects n/a dns-packet.
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