Improper resource allocation In python3
Description
An issue was discovered in Python before 3.11.1. An unnecessary quadratic algorithm exists in one path when processing some inputs to the IDNA (RFC 3490) decoder, such that a crafted, unreasonably long name being presented to the decoder could lead to a CPU denial of service. Hostnames are often supplied by remote servers that could be controlled by a malicious actor; in such a scenario, they could trigger excessive CPU consumption on the client attempting to make use of an attacker-supplied supposed hostname. For example, the attack payload could be placed in the Location header of an HTTP response with status code 302. A fix is planned in 3.11.1, 3.10.9, 3.9.16, 3.8.16, and 3.7.16.
Mitigation
Update Impact
Minimal update. May introduce new vulnerabilities or breaking changes.
Ecosystem | Component | Affected version | Patched versions |
|---|---|---|---|
 alpine v3.16 | 3.10.9-r0 | ||
 debian 12 | 7.3.11+dfsg-1 | ||
debian 13 | 7.3.11+dfsg-1 | ||
alpine v3.17 | 3.10.9-r0 | ||
alpine v3.19 | 3.11.1-r0 | ||
debian 12 | 3.11.1-1 | ||
alpine v3.14 | 3.9.16-r0 | ||
alpine v3.18 | 3.11.1-r0 | ||
alpine v3.21 | 3.11.1-r0 | ||
debian 14 | 7.3.11+dfsg-1 |
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Aliases
References