Effective 2019 Sep 15, Cisco will no longer publish non-Cisco product alerts. Cisco will continue to publish Security Advisories to address third-party software vulnerabilities per the Cisco Security Vulnerability Policy.
Multivendor Vulnerability Alert
OpenSSL ssl3_read_bytes Function Denial of Service Vulnerability
A vulnerability in OpenSSL could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on a targeted system.
The vulnerability is due to improper handling of warning packets by the affected software. An attacker could exploit this vulnerability by submitting crafted packets to the affected software. A successful exploit could cause the system to stop functioning properly, resulting in a DoS condition on the system.
OpenSSL confirmed the vulnerability and released a software patch.
The vulnerability is due to improper handling of warning packets by the ssl3_read_bytes function in ssl/s3_pkt.c of the affected software.
An unauthenticated, remote attacker could exploit this vulnerability by submitting crafted packets to the affected software. A successful exploit could cause the system to stop functioning properly, resulting in a DoS condition on the targeted system.
To exploit this vulnerability, the attacker may need access to trusted or internal networks to transmit crafted packets to a targeted system. This access requirement could limit the likelihood of a successful exploit.
Administrators are advised to apply the appropriate updates.
Administrators are advised to allow only trusted users to have network access.
Administrators are advised to monitor affected systems.
Seclist.org has released a security advisory at the following link: CVE-2016-8610
IBM has released a security bulletin at the following link: CVE-2016-8610
IBM has released software updates at the following link: IBM AIX Update
Red Hat has released updated software for registered subscribers at the following link: Red Hat Network. Red Hat packages can be updated on Red Hat Enterprise Linux versions 5 and later by using the yum tool.
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Cisco Multivendor Vulnerability Alerts respond to vulnerabilities identified in third-party vendors' products. These alerts contain information compiled from diverse sources and provide comprehensive technical descriptions, objective analytical assessments, workarounds and practical safeguards, and links to vendor advisories and patches.