Twisted: DNS Response Spoofing in twisted.names Due to Missing Source Address Validation
CVSS score
3.1
EPSS probability
—
Risk score
0.3
Published
2 h ago
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Impact on My Inventory
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Vulnerability description
DayBreach AI Explanation
Verified against sourcesSources read
1
Source agreement
Tam uyum
Evidence confidence
%55
Short explanation
The twisted.names.dns.DNSDatagramProtocol component in Twisted accepts UDP DNS responses for pending queries by matching only the 16-bit transaction ID without verifying the source address. This flaw allows attackers to inject forged DNS answers and redirect hostname resolution.
This vulnerability can enable mail interception, server-side request forgery, or man-in-the-middle positioning.
What should be done?
- Follow vendor advisories for updates
- Review related security advisories
- Examine DNSDatagramProtocol instance reuse in applications
Chain of evidence and sources
twisted.names.dns.DNSDatagramProtocol, işlem kimliği eşleştiğinde kaynak adres doğrulaması yapmadan UDP DNS yanıtlarını kabul eder.
Başarılı bir sahtecilik, ana makine adı çözümlemesini yönlendirebilir ve posta ele geçirmeyi etkinleştirebilir.
Show the technical text from the sources
Twisted is an event-based framework for internet applications, supporting Python 3.6+. Prior to 26.10.0rc1, twisted.names.dns.DNSDatagramProtocol accepts a UDP DNS response for a pending query when its 16-bit transaction ID matches but does not verify that the response came from the queried host and port. An attacker able to deliver a packet to the resolver's listening port with the correct transaction ID can inject a forged answer. The standard twisted.names.client.Resolver uses a new random source port for each query, increasing off-path attack complexity, while applications that reuse a DNSDatagramProtocol instance expose only the transaction-ID search space after the first query. A successful forgery can redirect hostname resolution and enable mail interception, server-side request forgery, or man-in-the-middle positioning. This issue is fixed in version 26.10.0rc1.
CVSS vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
CWE: CWE-346
This explanation was compiled automatically from the source records. Scores, active exploitation, patch and exploit status come straight from the sources.
IMPACT: Affected Products and Software
Affected Products
The following products are affected by CVE-2026-83813 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.
| ID | VENDOR | PRODUCT | ACTION |
|---|---|---|---|
| 1 | twisted | twisted | View |
RED HAT CSAF/VEX: Product Impact Check
SCORING: CVSS from Multiple Sources
CVSS Scores
The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.
| SCORE | VERSION | SEVERITY | VECTOR | SOURCE |
|---|---|---|---|---|
| 3.1 | CVSS V3_1 | LOW | CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N | CVE CNA |
| 3.1 | CVSS V31 | LOW | CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N | NVD |
Patch and Remediation Guide
Solution & Remediation Advisory
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Public exploit and active exploitation status
Verified exploit intelligence
No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.
Weakness Classification and Attack Patterns (CWE & CAPEC)
CWE - Common Weakness Enumeration
While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-83813 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-2026-83813 weaknesses.
Attack Vector and Accessibility
Official Sources and Advisories
Similar Vulnerabilities
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