CVE-2020-10739 Null dereference in istio/envoy

What is CVE-2020-10739?

CVE-2020-10739 is a high-severity vulnerability in istio.io istio/envoy, published on 2 Jun 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Istio 1.4.x before 1.4.9 and Istio 1.5.x before 1.5.4 contain the following vulnerability when telemetry v2 is enabled: by sending a specially crafted packet, an attacker could trigger a Null Pointer Exception resulting in a Denial of Service. This could be sent to the ingress gateway or a sidecar, triggering a null pointer exception which results in a denial of service. This also affects servicemesh-proxy where a null pointer exception flaw was found in servicemesh-proxy. When running Telemetry v2 (not on by default in version 1.4.x), an attacker could send a specially crafted packet to the ingress gateway or proxy sidecar, triggering a denial of service.

Weakness: CWE-476

Which versions are affected by CVE-2020-10739?

It affects 1 product.

Products include Istio Istio.

How do I fix CVE-2020-10739?

Upgrade to a fixed version.

Is CVE-2020-10739 being exploited?

There is no known exploitation of CVE-2020-10739 in the wild and no public exploit code.

Other vulnerabilities in istio.io istio/envoy

• CVE-2021-31921 Missing authorization in n/a Critical 9.8
• CVE-2021-34824 Information disclosure in n/a High 8.8
• CVE-2026-31837 Istio JWKS resolver to prevent private key material from being exposed when JWKS fetch fails. High 8.7
• CVE-2021-39155 Authorization Policy Bypass Due to Case Insensitive Host Comparison High 8.3
• CVE-2021-39156 Fragments in Path May Lead to Authorization Policy Bypass High 8.1

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-wr89-rp47-qc87, RHSA-2020:2148.