Zip slip vulnerability in Juju
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub.
Summary
The /charms endpoint on a Juju controller lacked sufficient authorization checks, allowing any user with an account on the controller to upload a charm. Uploading a malicious charm that exploits a Zip Slip vulnerability could allow an attacker to gain access to a machine running a unit through the affected charm.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Canonical | Juju | 2.0.0 to before 2.9.52; 3.0.0 to before 3.6.8 | 2.9.52, 3.6.8 | Patch available | CNA |
| — | github.com/juju/juju (Go) | before 0.0.0-20250619215741-6356e984b82a | 0.0.0-20250619215741-6356e984b82a | Patch available | GHSA-24ch-w38v-xmh8 |
- Juju VendorCanonical Affected 2.0.0 to before 2.9.52; 3.0.0 to before 3.6.8 Fixed in 2.9.52, 3.6.8 Patch available CNA
- github.com/juju/juju (Go) Vendor— Affected before 0.0.0-20250619215741-6356e984b82a Fixed in 0.0.0-20250619215741-6356e984b82a Patch available GHSA-24ch-w38v-xmh8
Remediation
- Fix · CNA Juju (Canonical) Fixed in 2.9.52, 3.6.8
- Fix · GHSA-24ch-w38v-xmh8 github.com/juju/juju (Go) Fixed in 0.0.0-20250619215741-6356e984b82a Advisory →
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Release ·
Canonical Juju 2.9.52, 3.6.8
3 records Highest priority Priority HIGH 2 HIGH, 1 MEDIUM
Other records, highest priority first
- TI-2025-00786 Arbitrary executable upload via authenticated endpointPriority HIGH 73
- TI-2025-33457 Sensitive log retrieval in JujuPriority MEDIUM 62
Timeline
- 2026-10-02 Threatist record created from CVE-2025-53513
- 2026-10-03 Alias added: GHSA-24ch-w38v-xmh8
References
Other 8
- https://github.com/juju/juju/commit/6356e984b82a4a7b9771ff5e51e297ad62f3b405
- https://github.com/juju/juju/commit/ff39557a137c0e95d4cd3553b0f19c859c6f5d8e
- https://drive.google.com/file/d/1pHRNiaA8LyMVJYwIyTqelsqJ9FmImDf0/view
- https://github.com/juju/juju
- https://github.com/juju/juju/blob/3.6/apiserver/apiserver.go#L754
- https://github.com/juju/juju/blob/3.6/apiserver/apiserver.go#L897
- https://github.com/juju/juju/blob/3.6/apiserver/apiserver.go#L990
- https://pkg.go.dev/vuln/GO-2025-3804
More Canonical Juju vulnerabilities
- TI-2026-03806 Improper TLS Client/Server authentication and certificate verification on Database Cluster CVSS 3.1CRITICAL 10.0
- TI-2025-00786 Arbitrary executable upload via authenticated endpoint CVSS 3.1HIGH 8.8
- TI-2017-06681 Juju before 1.25.12, 2.0.x before 2.0.4, and 2.1.x before 2.1.3 uses a UNIX domain socket… CVSS 3.0CRITICAL 9.8
- TI-2026-25186 Insecure Direct Object Reference attack via predictable secret ID in Juju CVSS 3.1MEDIUM 6.6
- TI-2025-41733 Juju: Resource poisoning CVSS 4.0HIGH 7.1
- TI-2025-33457 Sensitive log retrieval in Juju CVSS 3.1MEDIUM 6.5
Sources
- CVE-2025-53513 · CVE Program
- CVE-2025-53513 · NVD
- FIRST EPSS
- GHSA-24ch-w38v-xmh8 · GitHub Advisory Database · CC BY 4.0
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