# Duplicate Advisory: possible DoS caused by malformed signature decoding in Pure-Python ECDSA

Advisory record · `GHSA-2mrj-435v-c2cr` · Withdrawn

- **Identifiers:** `GHSA-2mrj-435v-c2cr` · `CVE-2019-14853` · `GHSA-pwfw-mgfj-7g3g` · `PYSEC-2019-177`
- **State:** Withdrawn
- **Severity:** CVSS 3.7 Low
- **Critical:** No
- **Weakness (CWE):** [CWE-391](https://cwe.mitre.org/data/definitions/391.html)
- **Tags:** [CWE-391](https://agentprime.io/advisories/tag/cwe-391.md)
- **Published:** 2 Dec 2019
- **Updated:** 30 Nov 2024
- **Reviewed by a person:** No

**Withdrawn.** The GitHub Advisory Database withdrew this advisory on 16 Jun 2020. The record stays here, marked withdrawn.

Published by the GitHub Advisory Database at 2 Dec 2019, 18:15 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `ecdsa` (PyPI): affected `<0.13.3`; fixed in `0.13.3`

## Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

## Severity and exploitation

- 3.7 Low, CVSS 3.0: `CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L`, from CNA (redhat)

- **CISA KEV:** Not listed.
- **EPSS:** 0.024, the 84th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

This record came from the full history of the GitHub Advisory Database, published 2 Dec 2019. New records show when each source confirmed them.

## Sources

- [GitHub Advisory Database: GHSA-2mrj-435v-c2cr](https://github.com/advisories/GHSA-2mrj-435v-c2cr)
- [OSV: GHSA-2mrj-435v-c2cr](https://osv.dev/vulnerability/GHSA-2mrj-435v-c2cr)
- <https://nvd.nist.gov/vuln/detail/CVE-2019-14853>
- <https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14853>
- <https://github.com/advisories/GHSA-2mrj-435v-c2cr>
- <https://github.com/advisories/GHSA-pwfw-mgfj-7g3g>
- <https://github.com/pypa/advisory-database/tree/main/vulns/ecdsa/PYSEC-2019-177.yaml>
- <https://github.com/warner/python-ecdsa/releases/tag/python-ecdsa-0.13.3>
- <https://seclists.org/bugtraq/2019/Dec/33>
- <https://www.debian.org/security/2019/dsa-4588>

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.

## Check whether this affects you

A Match means an installed version is in the affected range above. Most don’t affect the app; agentprime hasn’t analysed this one yet.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), ask your agent to check the project: `check_lockfile` sends a lockfile, `check_packages` a list of installed packages, and both return the Matches and the upgrades that clear them. `get_advisory` returns this record. Setup: <https://agentprime.io/mcp.md>
- In a browser: <https://agentprime.io/check/> reads your lockfile in the browser, never uploading it.
- Whether it touches your code, with file and line: the Claude Code plugin, <https://agentprime.io/plugin.md>
- As JSON: <https://api.agentprime.io/v1/advisories/GHSA-2mrj-435v-c2cr>, or `POST https://api.agentprime.io/v1/match` with your packages (<https://agentprime.io/api.md>)

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The web page: <https://agentprime.io/advisories/GHSA-2mrj-435v-c2cr/>. Everything for agents: <https://agentprime.io/llms.txt>.