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idna

A vulnerability was identified in the kjd/idna library, specifically within the `idna.encode()` function, affecting version 3.6. The issue arises from the function's handling of crafted input strings, which can lead to quadratic complexity and consequently, a denial of service condition. This vulnerability is triggered by a crafted input that causes the `idna.encode()` function to process the input with considerable computational load, significantly increasing the processing time in a quadratic manner relative to the input size.

CVE-2024-3651 identifies a vulnerability in the kjd/idna library, version 3.6, within the idna.encode() function responsible for encoding internationalized domain names. The vulnerability is due to inefficient regular expression handling that results in quadratic computational complexity when processing specially crafted input strings. This inefficiency causes the function to consume excessive CPU resources, leading to a denial of service condition by significantly slowing down or halting the processing of requests. The vulnerability does not compromise confidentiality or integrity but affects availability by enabling an attacker to degrade service performance or cause application unresponsiveness. Exploitation requires local access to the vulnerable function but no special privileges or user interaction, making it a low-barrier attack vector in environments where the library is used. No patches have been published yet, and no known exploits are reported in the wild. The vulnerability is tracked under CWE-1333 (Inefficient Regular Expression Complexity), highlighting the root cause as poor input handling in regular expression processing. This issue is relevant for applications and services that rely on the kjd/idna library for domain name encoding, especially those exposed to untrusted input. Without mitigation, attackers can craft input strings that trigger the quadratic complexity, causing denial of service through resource exhaustion.

Detailed information about CVE-2024-3651: CWE-1333 Inefficient Regular Expression Complexity in kjd kjd/idna affecting kjd kjd/idna. Get real-time updates, tech

CVE-2024-3651: CWE-1333 Inefficient Regular Expression Complexity in kjd kjd/idna - Live Threat Intelligence - Threat Radar | OffSeq.com

CVE-2024-3651: CWE-1333 Inefficient Regular Expression Complexity in kjd kjd/idna

The hsakmt packages include a thunk library for AMD's Heterogeneous System Architecture (HSA) Linux kernel driver (amdkfd).

Security Fix(es):

* python-idna: potential DoS via resource consumption via specially crafted inputs to idna.encode() (CVE-2024-3651)

CVE-2024-3651 is a vulnerability in the python-idna package where specially crafted inputs to the idna.encode() function can cause excessive resource consumption, leading to a denial of service condition. This issue is classified under CWE-400 (Uncontrolled Resource Consumption). Red Hat has issued a security advisory (RHSA-2024:3543) providing updated python-idna packages for Red Hat Enterprise Linux 8.8 Extended Update Support variants to fix this vulnerability. The advisory rates the security impact as moderate and recommends applying the update after ensuring all prior errata are installed.

Detailed information about Red Hat Security Advisory: python-idna security update affecting Red Hat Product Security Red Hat. Get real-time updates, technical d

Red Hat Security Advisory: python-idna security update - Live Threat Intelligence - Threat Radar | OffSeq.com


CVE-2024-3651: CWE-1333 Inefficient Regular Expression Complexity in kjd kjd/idnaCVE-2024-3651 0 A vulnerability was identified in the kjd/idna library, specifically within the `idna.encode()` function, affecting version 3.6. The issue arises from the function's handling of crafted input strings, which can lead to quadratic complexity and consequently, a denial of service condition. This vulnerability is triggered by a crafted input that causes the `idna.encode()` function to process the input with considerable computational load, significantly increasing the processing time in a quadratic manner relative to the input size. MediumVulnerabilityGermanyFranceUnited Kingdom+2#cve #cve-2024-3651 #cwe-1333 Join the discussion	CVE Database V5	07/07/2024, 17:22:10 UTC Added: 10/15/2025, 13:01:26 UTC
Red Hat Security Advisory: python-idna security and bug fix updateCVE-2024-3651 0 The hsakmt packages include a thunk library for AMD's Heterogeneous System Architecture (HSA) Linux kernel driver (amdkfd). Security Fix(es): * python-idna: potential DoS via resource consumption via specially crafted inputs to idna.encode() (CVE-2024-3651) MediumVulnerability#gcve #csaf #cve-2024-3651 Join the discussion	GCVE Database	06/11/2024, 19:32:52 UTC Added: 06/02/2026, 21:43:59 UTC

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