CVE-2026-125402

NameCVE-2026-125402
DescriptionEttercap through 0.8.4.1 contains a heap out-of-bounds read vulnerability in sslw_get_clienthello_sni() in src/ec_sslwrap.c that trusts the unchecked 16-bit SNI length field. Network-adjacent attackers can send crafted TLS ClientHello messages during SSL interception to leak up to 64 KB of heap memory upstream or crash Ettercap.
SourceCVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs1153591

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
ettercap (PTS)bookworm1:0.8.3.1-11vulnerable
trixie1:0.8.3.1-14vulnerable
sid1:0.8.4.1-2vulnerable

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
ettercapsource(unstable)(unfixed)1153591

Notes

https://github.com/Ettercap/ettercap/security/advisories/GHSA-v48w-7cvh-c7f4
Fixed by: https://github.com/Ettercap/ettercap/commit/a8c1a5085791b38c234be0e4129302fdc36964e0
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