CVE-2021-39155
high
CVSS v3
—
CVSS v4 NEW
—
VIR risk
8.0
Description
Authorization Policy Bypass Due to Case Insensitive Host Comparison
Predictions
Exploit likelihood
30%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| arch | fixed | 1.11.1-1 |
Package impact
| Ecosystem | Package | Vulnerable | Fixed |
|---|---|---|---|
| Go | istio.io/istio | <1.9.8 | 1.9.8 |
| Go | istio.io/istio | >=1.10.0,<1.10.4 | 1.10.4 |
| Go | istio.io/istio | >=1.11.0,<1.11.1 | 1.11.1 |
References
- https://github.com/istio/istio/security/advisories/GHSA-7774-7vr3-cc8j
- https://nvd.nist.gov/vuln/detail/CVE-2021-39155
- https://github.com/istio/istio/commit/084b417a486dbe9b9024d4812877016a484572b1
- https://github.com/istio/istio/commit/76ed51413ddd2a7fa253a368ab20a9cec5fb1cbe
- https://github.com/istio/istio/commit/90b00bdf891e6c770cb3235c14a9b1fda96cc7c5
- https://datatracker.ietf.org/doc/html/rfc4343
- https://github.com/istio/istio
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.