[Security Update] NeuVector 4.4.4-s2 addresses OpenSSL Alpine CVE-2022-0778

[NeuVector Updates for new release and security updates for the NeuVector container security platform]

To the NeuVector Technical Update subscribers<https://lists.suse.com/mailman/listinfo/neuvector-updates>,

Important: This security update is for the closed source, 4.x version of NeuVector. The open source 5.x (preview) versions will be updated during the next update cycle.

A vulnerability in OpenSSL rated as High affects the Alpine image used in the NeuVector Controller, Manager, and Enforcer images. NeuVector version 4.4.4-s2 remediates this CVE and has been published to Docker Hub (public) and registry.neuvector.com (private registry).

CVE-2022-0778 - A flaw was found in OpenSSL. It is possible to trigger an infinite loop by crafting a certificate that has invalid elliptic curve parameters. Since certificate parsing happens before verification of the certificate signature, any process that parses an externally supplied certificate may be subject to a denial of service attack.

Detailed description:
The BN_mod_sqrt() function, which computes a modular square root, contains a bug that can cause it to loop forever for non-prime moduli. Internally this function is used when parsing certificates that contain elliptic curve public keys in compressed form or explicit elliptic curve parameters with a base point encoded in compressed form. It is possible to trigger the infinite loop by crafting a certificate that has invalid explicit curve parameters. Since certificate parsing happens prior to verification of the certificate signature, any process that parses an externally supplied certificate may thus be subject to a denial of service attack. The infinite loop can also be reached when parsing crafted private keys as they can contain explicit elliptic curve parameters. Thus vulnerable situations include: - TLS clients consuming server certificates - TLS servers consuming client certificates - Hosting providers taking certificates or private keys from customers - Certificate authorities parsing certification requests from subscribers - Anything else which parses ASN.1 elliptic curve parameters Also any other applications that use the BN_mod_sqrt() where the attacker can control the parameter values are vulnerable to this DoS issue. In the OpenSSL 1.0.2 version the public key is not parsed during initial parsing of the certificate which makes it slightly harder to trigger the infinite loop. However any operation which requires the public key from the certificate will trigger the infinite loop. In particular the attacker can use a self-signed certificate to trigger the loop during verification of the certificate signature. This issue affects OpenSSL versions 1.0.2, 1.1.1 and 3.0. It was addressed in the releases of 1.1.1n and 3.0.2 on the 15th March 2022. Fixed in OpenSSL 3.0.2 (Affected 3.0.0,3.0.1). Fixed in OpenSSL 1.1.1n (Affected 1.1.1-1.1.1m). Fixed in OpenSSL 1.0.2zd (Affected 1.0.2-1.0.2zc).

Informational links:
https://security.alpinelinux.org/vuln/CVE-2022-0778
https://www.suse.com/security/cve/CVE-2022-0778.html
https://nvd.nist.gov/vuln/detail/CVE-2022-0778

If you believe you are affected by this CVE, please update to the 4.4.4-s2 version of NeuVector. Enterprise customers of NeuVector can contact support at neuvector.com<mailto:support at neuvector.com> for any questions.

Best regards,
The NeuVector Team

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