Vulnerability · Published Feb 14, 2020 · Assigned by mitre

CVE-2020-8843

High 7.4

In plain English

A high-severity security flaw in the affected software. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.1% (higher than 65% of all known vulnerabilities).

Severity (CVSS NVD)7.4High

Exploit odds (30 days)1.1%top 35.2% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

Official description

An issue was discovered in Istio 1.3 through 1.3.6. Under certain circumstances, it is possible to bypass a specifically configured Mixer policy. Istio-proxy accepts the x-istio-attributes header at ingress that can be used to affect policy decisions when Mixer policy selectively applies to a source equal to ingress. To exploit this vulnerability, someone has to encode a source.uid in this header. This feature is disabled by default in Istio 1.3 and 1.4.

Affected products (as reported)

Vendor	Product	Versions
n/a	n/a	n/a

References

https://github.com/istio/istio/commits/master x_refsource_MISC
https://istio.io/news/security/ x_refsource_MISC
https://istio.io/news/security/istio-security-2020-002/ x_refsource_CONFIRM