Vulnerability · Published May 27, 2021 · Assigned by mitre
CVE-2021-31920
Medium 6.5
In plain English
A medium-severity security flaw in the istio.io/istio package (Go). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.3% (higher than 71% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)6.5Medium
Exploit odds (30 days)1.3%top 29.1% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | istio.io/istio | 1.8.6 | GHSA-6q5m-22mq-q2xv |
| Go | istio.io/istio | 1.9.5 | GHSA-6q5m-22mq-q2xv |
Affected products (as reported)
References
- https://istio.io/latest/news/security/istio-security-2021-005/ x_refsource_CONFIRM