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🛡️ GHSA-6q5m-22mq-q2xv — istio (CVE-2021-31920)

⚪ Unknown ✅ No Known Exploit CWE-863 OSV
N/A
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Istio Authorization Bypass Vulnerability

Istio before 1.8.6 and 1.9.x before 1.9.5 has a remotely exploitable vulnerability where an HTTP request path with multiple slashes or escaped slash characters (%2F or %5C) could potentially bypass an Istio authorization policy when path based authorization rules are used.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity none, availability none.

Weakness class

GHSA-6q5m-22mq-q2xv is classified as CWE-863: Incorrect Authorization. An authorisation check runs but reaches the wrong conclusion, permitting actions it should refuse.

Affected software

GHSA-6q5m-22mq-q2xv is recorded against 1 package.

  • istio.io/istio

Timeline and source

Published on 24 May 2022 and last revised on 7 August 2023. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

nvd.nist.gov (Advisory)
istio.io (Web)

Details

Severity Unknown
CVSS Score N/A
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CWE CWE-863
Public Exploit ✅ No
Source OSV
Published 2022-05-24
Updated 2026-08-20
Modified 2023-08-07
Fix URL N/A

Affected Packages

Software From version Fixed in
istio.io/istio — —

Similar Threats

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