Описание
Improper Validation of Unsafe Equivalence in punycode by the idna crate from Servo rust-url allows an attacker to create a punycode hostname that one part of a system might treat as distinct while another part of that system would treat as equivalent to another hostname.
A flaw was found in idna crate. This vulnerability allows hostname spoofing and potential privilege escalation via specially crafted Punycode labels that render as ASCII or empty labels, leading to incorrect equality comparisons during hostname validation.
Отчет
Within regulated environments, a combination of the following controls acts as a significant barrier to successful exploitation of a CWE-1289: Improper Validation of Unsafe Equivalence in Input vulnerability, and therefore downgrades the severity of this particular CVE from Moderate to Low. Input validation routines enforce strict comparisons based on type, encoding, and format, preventing the interpretation of unsafe equivalence conditions that could bypass logic or access controls. Error-handling mechanisms ensure that ambiguous or malformed inputs are rejected without exposing system behavior or returning actionable feedback to an attacker. Additionally, real-time monitoring and alerting detect unusual input patterns or repeated bypass attempts, enabling a timely response and reducing the likelihood of successful exploitation.
Меры по смягчению последствий
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
Затронутые пакеты
| Платформа | Пакет | Состояние | Рекомендация | Релиз |
|---|---|---|---|---|
| Confidential Compute Attestation | confidential-compute-attestation-tech-preview/trustee-rhel9 | Not affected | ||
| OpenShift Serverless | openshift-serverless-1/kn-plugin-func-func-util-rhel8 | Fix deferred | ||
| Red Hat Ansible Automation Platform 2 | python3.11-nh3 | Fix deferred | ||
| Red Hat Enterprise Linux 10 | aardvark-dns | Not affected | ||
| Red Hat Enterprise Linux 10 | fido-device-onboard | Fix deferred | ||
| Red Hat Enterprise Linux 10 | firefox | Fix deferred | ||
| Red Hat Enterprise Linux 10 | gjs | Fix deferred | ||
| Red Hat Enterprise Linux 10 | glycin-loaders | Fix deferred | ||
| Red Hat Enterprise Linux 10 | keylime-agent-rust | Fix deferred | ||
| Red Hat Enterprise Linux 10 | librsvg2 | Fix deferred |
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Дополнительная информация
Статус:
EPSS
4.2 Medium
CVSS3
Связанные уязвимости
Improper Validation of Unsafe Equivalence in punycode by the idna crate from Servo rust-url allows an attacker to create a punycode hostname that one part of a system might treat as distinct while another part of that system would treat as equivalent to another hostname.
Improper Validation of Unsafe Equivalence in punycode by the idna crate from Servo rust-url allows an attacker to create a punycode hostname that one part of a system might treat as distinct while another part of that system would treat as equivalent to another hostname.
Improper Validation of Unsafe Equivalence in punycode by the idna crat ...
EPSS
4.2 Medium
CVSS3