Twisted is an event-based framework for internet applications, supporting Python 3.6+. Prior to 26.4.0rc2, the twisted.names module is vulnerable to a Denial of Service (DoS) attack via resource exhaustion during DNS name decompression. A remote, unauthenticated attacker can exploit this by sending a crafted TCP DNS packet containing deeply chained compression pointers. This flaw bypasses previous loop-prevention logic, causing the single-threaded Twisted reactor to hang while processing millions of recursive lookups, effectively freezing the server. This vulnerability is fixed in 26.4.0rc2.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 26.4.0CPE matchmatch criteria | cpe:2.3:a:twisted:twisted:*:*:*:*:*:*:*:* | ||
26.4.0CPE matchmatch criteria | cpe:2.3:a:twisted:twisted:26.4.0:rc1:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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