CVSS 3.1
Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)
Атакува се
Време до експлоатация
Атакува се по мрежата, без особени условия, без вход и без действие от потребителя.
- Експлоатация: няма данни за експлоатация
- Атаката може да се автоматизира
Описание
Оригинално описание
Punk versions before 0.18 for Perl allow session cookie forgery via an empty default HMAC key when a session is declared without a secret. The session keyword freezes its options onto the application as given: it does not require a secret, warn, or refuse to start when one is absent. The cookie read and the write-back both default that key to the empty string, so a declaration with no secret option, or with an undefined or empty one, signs and verifies with a zero-length HMAC-SHA256 key. An attacker who knows the cookie format can then mint one offline carrying any contents the session holds, such as a user identifier or a role. Nothing marks the misconfiguration at runtime: cookies are well formed and sessions round-trip as expected.
Засегнати продукти
- : преди 0.18
Вид слабост
История
- 22 август 2026 Публикувано
Първоизточници
- https://www.cve.org/CVERecord?id=CVE-2026-75870
- https://nvd.nist.gov/vuln/detail/CVE-2026-75870
- https://metacpan.org/release/LNATION/Punk-0.17/source/include/punk/punk_session.h
- https://metacpan.org/release/LNATION/Punk-0.17/view/lib/Punk.pm
- https://metacpan.org/release/LNATION/Punk-0.18/source/Changes
- http://www.openwall.com/lists/oss-security/2026/08/22/5