highREV. 01
CVE-2023-50387KeyTrap — Signed-Response Validation Consumes the Resolver
A signed-response feature of the name-resolution protocol can be answered in a way that makes a resolver spend enormous processor time on a single query, stalling it for everyone it serves.
Read the risk
THE VITAL STATS- CVSS score
- 7.5/ 10 CVSS v3.1
- EPSS probability
- 100% Likelihood of exploitation
- Attack complexity
- Low Conditions needed to exploit
- Known exploited
- Not listed
- CVE published
- 2024-02-14
- Exploit published
- Not recorded
- Confidence
- high
- Kill chain
- impact
- MITRE ATT&CK
- T1499
- Severity
- high
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attacker needsThe ability to get a resolver to query attacker-controlled records
Behind the card
5 REFERENCES- 01CVE recordNVD recordnvd.nist.gov
- 02Vendor advisorygitlab.nic.czgitlab.nic.cz
- 03Vendor advisorymsrc.microsoft.commsrc.microsoft.com
- 04Vendor advisorynlnetlabs.nlnlnetlabs.nl
- 05Vendor advisorytheregister.comtheregister.com
Field-level provenanceTRACE THE SOURCES +
Which source supports each field, when it was retrieved, and who extracted it.
| Fields | Source | Retrieved | Extractor | Confidence |
|---|---|---|---|---|
| cvss, exploitation.attack_complexity, exploitation.exploit_available, references, published_at | nvd.nist.gov | 2026-08-07 | scrty-crds-pipeline/0.1 | high |
| epss | api.first.org | 2026-08-07 | scrty-crds-pipeline/0.1 | high |
| title, summary, severity, remediation, mitre_attack, kill_chain, recommended_action, confidence, tags, exploitation.prerequisites | nvd.nist.gov | 2026-08-07 | claude-code | high |
Printing history
THE RECORD- r1Initial base card
First printing. This card has not been reprinted since publication.