概要
Mbed TLS often ships inside firmware, appliances, SDK snapshots, embedded services, and custom TLS stacks where a vulnerable library can remain after normal application dependency checks look clean. CVE-2024-45159 is narrow: it affects TLS 1.3 servers using optional client authentication, so repo evidence should drive upgrade and configuration review rather than a confirmed-authentication-bypass claim.
仕組み
The repo check looks for explicit Mbed TLS version evidence in source headers and build configuration for releases from 3.2.0 through 3.6.0. Version-header evidence is strongest because it comes from the library's own metadata; build-file evidence still indicates an affected dependency source that should be reviewed and rebuilt.
被害範囲
If the affected Mbed TLS library is linked into a deployed TLS 1.3 server that uses optional client authentication, a client certificate valid for another purpose may be accepted for client authentication under the advisory conditions. A repo match should trigger dependency remediation and runtime validation before anyone treats it as confirmed production exposure.
// fixvibeのチェック内容
FixVibeのチェック内容
FixVibe repo scans look for high-confidence security patterns and dependency risk in source context. Reports identify the affected area and recommended fix. For check-specific questions about exact detection heuristics, active payload details, or source-code rule patterns, contact support@fixvibe.app.
鉄壁の防御
Upgrade Mbed TLS to 3.6.1 or newer, or apply a vendor-supported backport, then rebuild every statically linked binary, firmware image, container image, or appliance package that includes the library. If rollout is delayed, review TLS 1.3 optional client authentication against the vendor workaround and verify the deployed artifact's library version directly before closing the advisory.