Описание
A flaw was found in gnutls. Servers configured with RSA-PSK (Rivest–Shamir–Adleman – Pre-Shared Key) wrongfully matched usernames containing a NUL character with truncated usernames. A remote attacker could exploit this by sending a specially crafted username, leading to an authentication bypass. This vulnerability allows an attacker to gain unauthorized access by circumventing the authentication process.
Пакеты
| Пакет | Статус | Версия исправления | Релиз | Тип |
|---|---|---|---|---|
| gnutls28 | fixed | 3.8.13-1 | package |
Примечания
https://www.gnutls.org/security-new.html#GNUTLS-SA-2026-04-29-4
https://gitlab.com/gnutls/gnutls/-/issues/1850
Fixed by: https://gitlab.com/gnutls/gnutls/-/commit/cb1833afd9b6309563211b1c0a7c291f52ca98d5 (3.8.13)
Introduced with: https://gitlab.com/gnutls/gnutls/-/commit/d00638997fa269a975095d852633b48b2b64fbf9 (3.6.13)
EPSS
Связанные уязвимости
A flaw was found in gnutls. Servers configured with RSA-PSK (Rivest–Shamir–Adleman – Pre-Shared Key) wrongfully matched usernames containing a NUL character with truncated usernames. A remote attacker could exploit this by sending a specially crafted username, leading to an authentication bypass. This vulnerability allows an attacker to gain unauthorized access by circumventing the authentication process.
A flaw was found in gnutls. Servers configured with RSA-PSK (Rivest–Shamir–Adleman – Pre-Shared Key) wrongfully matched usernames containing a NUL character with truncated usernames. A remote attacker could exploit this by sending a specially crafted username, leading to an authentication bypass. This vulnerability allows an attacker to gain unauthorized access by circumventing the authentication process.
A flaw was found in gnutls. Servers configured with RSA-PSK (Rivest–Shamir–Adleman – Pre-Shared Key) wrongfully matched usernames containing a NUL character with truncated usernames. A remote attacker could exploit this by sending a specially crafted username, leading to an authentication bypass. This vulnerability allows an attacker to gain unauthorized access by circumventing the authentication process.
Gnutls: gnutls: authentication bypass via nul character in username
EPSS