Описание
Libevent is an event notification library. Prior to 2.1.13 and 2.2.2-alpha, libevent has two HTTP parsing weaknesses in http.c. evhttp_decode_uri_internal decodes percent-encoded %00 bytes into literal NUL characters, which can cause downstream C string operations to truncate a path and bypass validation performed on a different representation. evhttp_header_is_valid_value also accepts obsolete line folding in header values containing carriage return or line feed characters, allowing a proxy and libevent to interpret headers differently and enabling header injection or access control bypass. The CRLF header acceptance is fixed in versions 2.1.13 and 2.2.2-alpha, but the reviewed patches do not clearly remediate the URI NUL-truncation condition.
| Релиз | Статус | Примечание |
|---|---|---|
| devel | not-affected | 2.1.13-stable-1build1 |
| esm-infra-legacy/trusty | released | 2.0.21-stable-1ubuntu1.14.04.2+esm1 |
| esm-infra-legacy/xenial | released | 2.0.21-stable-2ubuntu0.16.04.1+esm1 |
| esm-infra/bionic | released | 2.1.8-stable-4ubuntu0.1~esm1 |
| esm-infra/focal | released | 2.1.11-stable-1ubuntu0.1~esm1 |
| jammy | released | 2.1.12-stable-1ubuntu0.1 |
| noble | released | 2.1.12-stable-9ubuntu2.1 |
| resolute | released | 2.1.12-stable-10ubuntu0.1 |
| upstream | released | 2.1.13 |
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Связанные уязвимости
Libevent is an event notification library. Prior to 2.1.13 and 2.2.2-alpha, libevent has two HTTP parsing weaknesses in http.c. evhttp_decode_uri_internal decodes percent-encoded %00 bytes into literal NUL characters, which can cause downstream C string operations to truncate a path and bypass validation performed on a different representation. evhttp_header_is_valid_value also accepts obsolete line folding in header values containing carriage return or line feed characters, allowing a proxy and libevent to interpret headers differently and enabling header injection or access control bypass. The CRLF header acceptance is fixed in versions 2.1.13 and 2.2.2-alpha, but the reviewed patches do not clearly remediate the URI NUL-truncation condition.
Libevent: HTTP header handling bugs create risk of access control bypass.
Libevent is an event notification library. Prior to 2.1.13 and 2.2.2-a ...
Уязвимость функции evhttp_decode_uri_internal() библиотеки асинхронного уведомления событий Libevent, позволяющая нарушителю вызвать отказ в обслуживании
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