CVE-2020-8843 Security feature bypass in n/a
Attackers can bypass Mixer policies by injecting headers, requiring specific non-default configurations in Istio service mesh deployments.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2020-8843?
CVE-2020-8843 is a high-severity vulnerability in n/a, published on 14 Feb 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
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.
Weakness: CWE-20
Which versions are affected by CVE-2020-8843?
It affects 1 product.
Products include Istio Istio.
How do I fix CVE-2020-8843?
No fix has been published for CVE-2020-8843 yet. Limit exposure of the affected software until one is available.
Is CVE-2020-8843 being exploited?
There is no known exploitation of CVE-2020-8843 in the wild and no public exploit code.
Other vulnerabilities in n/a
- CVE-2021-31921 Missing authorization in n/a
- CVE-2021-34824 Information disclosure in n/a
- CVE-2026-31837 Istio JWKS resolver to prevent private key material from being exposed when JWKS fetch fails.
- CVE-2021-39155 Authorization Policy Bypass Due to Case Insensitive Host Comparison
- CVE-2021-39156 Fragments in Path May Lead to Authorization Policy Bypass
Sources
Also known as GHSA-8hpm-7f4v-97xg.