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OpenSSL Vulnerabilities Impact Multiple Cisco Products

Cisco confirms that IoT Field Network Director and Operational Insights Collector are impacted by buffer overflow vulnerabilities in OpenSSL

Threat ID:
CC-4208
Threat Severity:
Information only
Published:
9 November 2022 2:21 PM
Report a cyber attack: call 0300 303 5222 or email [email protected]

Summary

Cisco confirms that IoT Field Network Director and Operational Insights Collector are impacted by buffer overflow vulnerabilities in OpenSSL

Threat details

Introduction

Cisco has confirmed that their product IoT Field Network Director is impacted by OpenSSL vulnerabilities CVE-2022-3602 and CVE-2022-3786. The vulnerabilities could be exploited by a malicious attacker to cause a denial-of-service condition or to facilitate remote code execution on an affected system.  

 

Threat updates

Date Update
24 Nov 2022 Cisco updates vulnerable products list

Cisco has updated their vulnerable products to include the Operational Insights Collector. This article has been updated to reflect those changes. 

Remediation advice

Affected organisations should review Cisco Advisory cisco-sa-openssl-W9sdCc2a and apply the relevant update. 

CVE Vulnerabilities

Status Published

CVE-2022-3602

A buffer overrun can be triggered in X.509 certificate verification, specifically in name constraint checking. Note that this occurs after certificate chain signature verification and requires either a CA to have signed the malicious certificate or for the application to continue certificate verification despite failure to construct a path to a trusted issuer. An attacker can craft a malicious email address to overflow four attacker-controlled bytes on the stack. This buffer overflow could result in a crash (causing a denial of service) or potentially remote code execution. Many platforms implement stack overflow protections which would mitigate against the risk of remote code execution. The risk may be further mitigated based on stack layout for any given platform/compiler. Pre-announcements of CVE-2022-3602 described this issue as CRITICAL. Further analysis based on some of the mitigating factors described above have led this to be downgraded to HIGH. Users are still encouraged to upgrade to a new version as soon as possible. In a TLS client, this can be triggered by connecting to a malicious server. In a TLS server, this can be triggered if the server requests client authentication and a malicious client connects.
Status Published

CVE-2022-3786

A buffer overrun can be triggered in X.509 certificate verification, specifically in name constraint checking. Note that this occurs after certificate chain signature verification and requires either a CA to have signed a malicious certificate or for an application to continue certificate verification despite failure to construct a path to a trusted issuer. An attacker can craft a malicious email address in a certificate to overflow an arbitrary number of bytes containing the `.' character (decimal 46) on the stack. This buffer overflow could result in a crash (causing a denial of service). In a TLS client, this can be triggered by connecting to a malicious server. In a TLS server, this can be triggered if the server requests client authentication and a malicious client connects.

Last edited: 24 November 2022 12:48 pm