CVE-2026-25793
HighSummary
Nebula to skalowalne narzędzie do tworzenia sieci nakładkowych. W wersjach od 1.7.0 do 1.10.2, przy użyciu certyfikatów P256 (co nie jest domyślną konfiguracją), możliwe jest ominięcie wpisu na czarnej liście utworzonego na podstawie odcisku palca certyfikatu, wykorzystując podatność na malleabilność podpisu ECDSA.
Risk Assessment
Organizacje mogą być narażone na ataki, które wykorzystują tę podatność do ominięcia zabezpieczeń opartych na czarnej liście certyfikatów. Może to prowadzić do nieautoryzowanego dostępu do zasobów sieciowych.
Recommendation
Zaleca się aktualizację do wersji 1.10.3 lub nowszej, aby usunąć tę podatność. Dodatkowo, warto rozważyć przegląd konfiguracji certyfikatów w celu zwiększenia bezpieczeństwa.
Related vulnerabilities
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A buffer overflow vulnerability was identified in the Totolink A3002MU (version Hh-B20211125.1046) within the formWlEncrypt function of the /boafrm/formWlEncrypt file. Manipulation of the submit-url argument allows remote exploitation. The exploit is publicly available and may be used.
- CVE-2026-93739Critical
A buffer overflow vulnerability was determined in the Totolink A3002MU (version Hh-B20211125.1046) within the formWlAc function of the /boafrm/formWlAc file. Manipulation of the submit-url argument can lead to a buffer overflow. The attack may be performed remotely, and the exploit has been publicly disclosed.
- CVE-2026-75885Critical
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- CVE-2026-93738Critical
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- CVE-2026-93839Critical
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- CVE-2026-84082Critical
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- CVE-2026-84078Critical
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- CVE-2026-84075Critical
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- CVE-2026-84073Critical
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- CVE-2026-84064Critical
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Original NVD description (English source)
Nebula is a scalable overlay networking tool. In versions from 1.7.0 to 1.10.2, when using P256 certificates (which is not the default configuration), it is possible to evade a blocklist entry created against the fingerprint of a certificate by using ECDSA Signature Malleability to use a copy of the certificate with a different fingerprint. This issue has been patched in version 1.10.3.

