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GHSA-g6w9-m7h7-wgq9

Опубликовано: 04 авг. 2026
Источник: github
Github: Не прошло ревью
CVSS3: 6.5

Описание

A stack-based out-of-bounds read vulnerability exists in the "s_vlog" function of stunnel, when handling oversized log messages via "vsnprintf". A remote attacker with network access to a stunnel service can send protocol inputs that trigger a log message longer than 1024 bytes, leading to an out-of-bounds stack read and a potential crash. In certain corner cases, the same vulnerability could be used to replace a series of trailing "\n" characters with "\0".

A stack-based out-of-bounds read vulnerability exists in the "s_vlog" function of stunnel, when handling oversized log messages via "vsnprintf". A remote attacker with network access to a stunnel service can send protocol inputs that trigger a log message longer than 1024 bytes, leading to an out-of-bounds stack read and a potential crash. In certain corner cases, the same vulnerability could be used to replace a series of trailing "\n" characters with "\0".

EPSS

Процентиль: 28%
0.00353
Низкий

6.5 Medium

CVSS3

Дефекты

CWE-125

Связанные уязвимости

CVSS3: 6.5
ubuntu
27 дней назад

A stack-based out-of-bounds read vulnerability exists in the "s_vlog" function of stunnel, when handling oversized log messages via "vsnprintf". A remote attacker with network access to a stunnel service can send protocol inputs that trigger a log message longer than 1024 bytes, leading to an out-of-bounds stack read and a potential crash. In certain corner cases, the same vulnerability could be used to replace a series of trailing "\n" characters with "\0".

CVSS3: 6.5
redhat
27 дней назад

A stack-based out-of-bounds read vulnerability exists in the "s_vlog" function of stunnel, when handling oversized log messages via "vsnprintf". A remote attacker with network access to a stunnel service can send protocol inputs that trigger a log message longer than 1024 bytes, leading to an out-of-bounds stack read and a potential crash. In certain corner cases, the same vulnerability could be used to replace a series of trailing "\n" characters with "\0".

CVSS3: 6.5
nvd
27 дней назад

A stack-based out-of-bounds read vulnerability exists in the "s_vlog" function of stunnel, when handling oversized log messages via "vsnprintf". A remote attacker with network access to a stunnel service can send protocol inputs that trigger a log message longer than 1024 bytes, leading to an out-of-bounds stack read and a potential crash. In certain corner cases, the same vulnerability could be used to replace a series of trailing "\n" characters with "\0".

msrc
25 дней назад

Stunnel: stack-based out-of-bounds read/write in stunnel s_vlog via oversized log message

CVSS3: 6.5
debian
27 дней назад

A stack-based out-of-bounds read vulnerability exists in the "s_vlog" ...

EPSS

Процентиль: 28%
0.00353
Низкий

6.5 Medium

CVSS3

Дефекты

CWE-125