Security context

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

mkleehammer/pyodbc

              master @ 9fd386c
            

Fixes

CVEs

HIGH

Peak severity

50.0%

Coverage

Highlights

Buffer Overflow: 1 prior fix. Scrutinize any change in this area.

src/getdata.cpp: most-fixed (1 issue). Treat as high-risk during review.

2 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: Fetching decimal database values with more than 100 digits could overflow a hardcoded 100-byte stack-based buffer, leading to arbitrary code execution or application crashes.

Buffer Overflow: Parsing decimal values using static buffers without dynamic resizing led to static buffer overflows, requiring a migration to Python Unicode objects.

Denial of Service: Failing to decrement the reference count of temporary Python objects (e.g., 'newDigits' PyObject) during Python-to-C decimal conversion leads to memory leaks, exposing long-running database processes to OOM denial of service.