No access to your tenant or devices. Every item links to its source. What this means
ASTEVAL is an evaluator of Python expressions and statements. Prior to 1.0.9, FROM_PY in asteval/astutils.py exposes BaseException, SystemExit, KeyboardInterrupt, and GeneratorExit to expressions evaluated by asteval.Interpreter.eval(), while run() and eval() in asteval/asteval.py catch Exception rather than these non-Exception BaseException subclasses. When an attacker-controlled expression raises one of these classes, on_raise() passes the class to raise_exception(), and the resulting exception bypasses the interpreter's safety handlers and propagates into the calling application. A consuming service that evaluates untrusted expressions can therefore be terminated or have signal and cleanup handling disrupted, causing denial of service. The separately documented read-only open() capability is not part of this vulnerability. This issue is fixed in version 1.0.9.
Read the publisher's advisoryVendor product
Shown as published. These rules are not interpreted as NuGet package version ranges.
{
"vendor": "lmfit",
"product": "asteval",
"versions": [
{
"version": "< 1.0.9",
"status": "affected"
}
]
}Original source record · Cite this exact observation · Complete original publisher JSON