CVSS 4.0
Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)
Атакува се
Време до експлоатация
Атакува се по мрежата, при специфични условия, без вход и без действие от потребителя.
- Експлоатация: има публичен пример за експлоатация
- Атаката не може да се автоматизира
Описание
Оригинално описание
A vulnerability was determined in mkj Dropbear up to 2025.89. Impacted is the function unpackneg of the file src/curve25519.c of the component S Range Check. This manipulation causes improper verification of cryptographic signature. The attack can be initiated remotely. The attack is considered to have high complexity. The exploitability is considered difficult. The actual existence of this vulnerability is currently in question. Patch name: fdec3c90a15447bd538641d85e5a3e3ac981011d. To fix this issue, it is recommended to deploy a patch. The project maintainer explains: "Signature Malleability is not exploitable in SSH protocol. (...) [A] PoC doesn't exist for SSH implementation, but rather it's against the internal API."
Засегнати продукти
- mkj Dropbear: 2025.0; 2025.1; 2025.2; 2025.3; 2025.4; 2025.5; 2025.6; 2025.7; 2025.8; 2025.9; 2025.10; 2025.11; 2025.12; 2025.13; 2025.14; 2025.15; 2025.16; 2025.17; 2025.18; 2025.19; 2025.20; 2025.21; 2025.22; 2025.23; 2025.24; 2025.25; 2025.26; 2025.27; 2025.28; 2025.29; 2025.30; 2025.31; 2025.32; 2025.33; 2025.34; 2025.35; 2025.36; 2025.37; 2025.38; 2025.39; 2025.40; 2025.41; 2025.42; 2025.43; 2025.44; 2025.45; 2025.46; 2025.47; 2025.48; 2025.49; 2025.50; 2025.51; 2025.52; 2025.53; 2025.54; 2025.55; 2025.56; 2025.57; 2025.58; 2025.59; 2025.60; 2025.61; 2025.62; 2025.63; 2025.64; 2025.65; 2025.66; 2025.67; 2025.68; 2025.69; 2025.70; 2025.71; 2025.72; 2025.73; 2025.74; 2025.75; 2025.76; 2025.77; 2025.78; 2025.79; 2025.80; 2025.81; 2025.82; 2025.83; 2025.84; 2025.85; 2025.86; 2025.87; 2025.88; 2025.89
Вид слабост
История
- 8 март 2026 Публикувано
Първоизточници
- https://www.cve.org/CVERecord?id=CVE-2026-3706
- https://nvd.nist.gov/vuln/detail/CVE-2026-3706
- https://vuldb.com/?id.349652
- https://vuldb.com/?ctiid.349652
- https://vuldb.com/?submit.765933
- https://github.com/mkj/dropbear/issues/406
- https://github.com/mkj/dropbear/pull/407
- https://github.com/mkj/dropbear/commit/fdec3c90a15447bd538641d85e5a3e3ac981011d
- https://github.com/str4d/ed25519-java/issues/82#issue-727629226
- https://github.com/mkj/dropbear/