CVE-2026-115723
CVE-2026-115723 · Snap7 through 1.4.3 Out-of-Bounds Write via BRecv and CheckAsBRecvCompletion
Esta página presenta datos de fuentes públicas de vulnerabilidades. Consulta el aviso original antes de actualizar.
Snap7 through 1.4.3 contains an out-of-bounds write vulnerability in the passive partner that allows a malicious active partner to overflow application buffers by declaring an unvalidated BSend total length. Attackers connecting from the configured peer address can declare up to 65535 bytes and send a short fragment, causing BRecv to memcpy past the buffer and crash or corrupt SCADA, HMI or gateway processes.
CVSS 8.3 · Alta · EPSS 0,4%
- Publicación
- Actualización
Pila tecnológica: system
Productos y versiones afectados
snap7
- Versiones
- ≥ 0, ≤ 1.4.3: Afectada (custom)
Sin corrección publicada
snap7 Ubuntu:26.10
- Versiones
- 1.4.2+dfsg-1build1
- Intervalos de versiones afectados
- ECOSYSTEM: (−∞, +∞)
Sin corrección publicada
snap7 Ubuntu:26.04:LTS
- Versiones
- 1.4.2+dfsg-1
- 1.4.2+dfsg-1build1
- Intervalos de versiones afectados
- ECOSYSTEM: (−∞, +∞)
Sin corrección publicada
Fuentes originales
- https://github.com/davenardella/snap7/pull/41
- https://github.com/davenardella/snap7/blob/30f37da3114024a71ba93f7fd855c680b97a406f/src/core/s7_partner.cpp#L1126-L1166
- https://github.com/davenardella/snap7/blob/30f37da3114024a71ba93f7fd855c680b97a406f/src/core/s7_partner.cpp#L850-L867
- https://www.vulncheck.com/advisories/snap7-through-1.4.3-out-of-bounds-write-via-brecv-and-checkasbrecvcompletion
- https://nvd.nist.gov/vuln/detail/CVE-2026-115723