Security context

What an agent needs to avoid regressing past fixes and find the next vuln in this repo.

qos-ch/logback

              master @ c91c9f6
            

Fixes

CVEs

CRITICAL

Peak severity

Highlights

Attack Surface Reduction: 1 prior fix. Scrutinize any change in this area.

logback-core: most-fixed (2 issues). Treat as high-risk during review.

1 high-severity fix in this history; regressions here are high-impact.

Recurring patterns

The bug types that recur here, drawn from past fixes, not open vulnerabilities.

Deserialization: Attackers can bypass class allowlist checks in hardened object input streams by wrapping payload classes within Java dynamic proxies, leading to arbitrary code execution or denial of service.

Attack Surface Reduction: Legacy and unused network receivers (e.g. SocketReceiver and SSLSocketReceiver) expose open network ports that can accept untrusted serialized objects, representing a persistent remote exploitation vector.

Insecure Defaults: Transport security configurations defaulting to legacy SSL protocol versions and omitting hostname verification expose log data and server credentials to man-in-the-middle (MitM) interception.