Security context

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

obgm/libcoap

              develop @ e2463f0
            

Fixes

CVEs

CRITICAL

Peak severity

33.3%

Coverage

Highlights

Buffer Overflow: 16 prior fixes. Scrutinize any change in this area.

src/net.c: most-fixed (13 issues). Treat as high-risk during review.

48 high-severity fixes in this history; regressions here are high-impact.

Recurring patterns

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

Buffer Overflow: Inadequate length validation when parsing hostnames from CoAP URIs allows copying attacker-controlled input into fixed stack/heap buffers, leading to memory corruption during address resolution. This is a critical remote risk when proxy features are active.

Auth Bypass: Flaws in sequence number validation (such as skipping sender sequence validation checks or shift overflows in sliding window calculations) allow remote attackers to bypass OSCORE replay protections.

Memory Safety: Relying on unsafe parsing or assert() calls for bounds checking during CBOR unwrap and parsing operations allows attackers to trigger out-of-bounds reads and memory safety violations via malformed OSCORE configurations.