CVE-2026-40194
⚪ Do wiadomości
Porównanie HMAC w phpseclib umożliwia atak na czas, co może prowadzić do ujawnienia danych.
CVSS
3.7
EPSS
0.0%
Exploit
none
Vendor
phpseclib
Opis źródłowy (NVD)
phpseclib is a PHP secure communications library. Prior to 3.0.51, 2.0.53, and 1.0.28, phpseclib\Net\SSH2::get_binary_packet() uses PHP's != operator to compare a received SSH packet HMAC against the locally computed HMAC. != on equal-length binary strings in PHP uses memcmp(), which short-circuits on the first differing byte. This is a real variable-time comparison (CWE-208), proven by scaling benchmarks. This vulnerability is fixed in 3.0.51, 2.0.53, and 1.0.28.
brak
Brak patcha
Źródła i daty
| Źródło | Wartość |
|---|---|
| NVD – CVSS | 3.7 |
| CISA KEV (aktywnie wykorzystywane) | Nie |
| FIRST EPSS (prawdopodobieństwo exploita) | 0.0% |
| Opublikowano (NVD) | 2026-04-10 21:16:27 UTC |
| Ostatnia modyfikacja (NVD) | 2026-04-21 19:19:19 UTC |
Referencje
- https://github.com/phpseclib/phpseclib/commit/ffe48b6b1b1af6963327f0a5330e3aa004a194ac (security-advisories@github.com) [Patch]
- https://github.com/phpseclib/phpseclib/releases/tag/1.0.28 (security-advisories@github.com) [Release Notes]
- https://github.com/phpseclib/phpseclib/releases/tag/2.0.53 (security-advisories@github.com) [Release Notes]
- https://github.com/phpseclib/phpseclib/releases/tag/3.0.51 (security-advisories@github.com) [Release Notes]
- https://github.com/phpseclib/phpseclib/security/advisories/GHSA-r854-jrxh-36qx (security-advisories@github.com) [Vendor Advisory]