Source: rebar3 Version: 3.24.0-1 X-Debbugs-CC: [email protected] Severity: important Tags: security upstream
Hi, The following vulnerability was published for rebar3. CVE-2026-117666[0]: | Improper Validation of Certificate with Host Mismatch vulnerability | in deadtrickster ssl_verify_fun allows an adversary in the middle to | impersonate a TLS peer via a certificate that carries a partial- | label wildcard. try_match_wildcard/4 in src/ssl_verify_hostname.erl | anchors only the text before and after the * of an identifier such | as f*.example.net, so the wildcard also consumes dots and the | certificate is accepted for f.evil.example.net. RFC 6125 confines a | wildcard to the left-most label. The same matcher lets *.168.1.1 | match the IP literal 192.168.1.1. Whole-label wildcards are matched | correctly. Erlang/OTP 20.0 and later check the hostname in ssl | before a user verify_fun sees valid_peer, so a client that keeps | server_name_indication set rejects the mismatch regardless. Exposed | are clients that disable SNI, servers that verify client certificate | hostnames with this library, and direct callers of | verify_cert_hostname/2. This issue affects ssl_verify_fun: from | 1.0.1 before 1.1.8. rebar3 since 3.20.0 upstream vendors the ssl_verify_fun source. If you fix the vulnerability please also make sure to include the CVE (Common Vulnerabilities & Exposures) id in your changelog entry. For further information see: [0] https://security-tracker.debian.org/tracker/CVE-2026-117666 https://www.cve.org/CVERecord?id=CVE-2026-117666 [1] https://github.com/deadtrickster/ssl_verify_fun.erl/security/advisories/GHSA-7gw2-hphm-c5px [2] https://cna.erlef.org/cves/CVE-2026-117666.html [3] https://osv.dev/vulnerability/EEF-CVE-2026-117666 Please adjust the affected versions in the BTS as needed. Regards, Salvatore
