CVE-2021-23386
MEDIUMCVSS 6.5/10EPSS 1.43%
Last modified
CVE-2021-23386 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. 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. EPSS estimates a 1.43% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Dns-Packet Project | Dns-Packet | < 1.3.4 |
| Dns-Packet Project | Dns-Packet | >= 2.0.0, < 5.2.2 |
References
- https://github.com/mafintosh/dns-packet/commit/25f15dd0fedc53688b25fd053ebbdffe3d5c1c56Patch, Third Party Advisory
- https://hackerone.com/bugs?subject=user&%3Breport_id=968858Permissions Required, Third Party Advisory
- https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1295719Patch, Third Party Advisory
- https://snyk.io/vuln/SNYK-JS-DNSPACKET-1293563Patch, Third Party Advisory
- https://github.com/mafintosh/dns-packet/commit/25f15dd0fedc53688b25fd053ebbdffe3d5c1c56Patch, Third Party Advisory
- https://hackerone.com/bugs?subject=user&%3Breport_id=968858Permissions Required, Third Party Advisory
- https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1295719Patch, Third Party Advisory
- https://snyk.io/vuln/SNYK-JS-DNSPACKET-1293563Patch, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-23386?
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.
How severe is CVE-2021-23386?
CVE-2021-23386 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 1.43% probability of exploitation in the next 30 days.
How do I fix CVE-2021-23386?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
Are you affected by CVE-2021-23386?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST