A vulnerability in Intel CPU hardware could allow a local attacker to gain access to sensitive information on a targeted system.
The vulnerability is due to side-channel attacks, which are also referred to as Meltdown attacks. A local attacker could exploit this vulnerability by executing arbitrary code on the affected system. A successful exploit could allow the attacker to gain access to sensitive information on the targeted system, including accessing memory from the CPU cache.
Proof-of-concept code that demonstrates an exploit of this vulnerability is publicly available.
Intel has confirmed the vulnerability and updates are available.
Cisco is aware of recently published security research related to speculative execution in modern CPU architectures. Our team is following our well-established process to investigate all aspects of the issue and evaluate any potential impact on Cisco products. If something new is found that our customers need to be aware of and respond to, we will share it through our established PSIRT disclosure processes.
Cisco previously documented this vulnerability in a Security Activity Bulletin at the following link: Alert 56354
Administrators are advised to contact the vendor regarding future updates and releases and to apply the appropriate third-party updates.
Administrators can apply Snort SIDs 45357-45368 to help prevent attacks that attempt to exploit this vulnerability.
Administrators are advised to monitor affected systems.
Intel has released a security advisory at the following link: intel-oss-10003
IBM has released software updates, as described in the "Remediation" section of the IBM security bulletin.
Microsoft customers can obtain updates directly by using the links in the Microsoft Security Update Guide. These updates are also distributed by Windows automatic update features and are available from the Microsoft Update Catalog. Microsoft Windows Server Update Services (WSUS), Systems Management Server, and System Center Configuration Manager can assist administrators in deploying software updates.
Mozilla has released software updates at the following link: Firefox 57.0.4
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.
Updated to add Snort signatures. Mozilla has released an advisory and updated software, and Red Hat has released additional security advisories and updated packages to address the Intel CPU indirect branch prediction information disclosure vulnerability.
Red Hat Enterprise Linux ELS (Extended Life Cycle Support)
5 (x86_64, i386) | (for IBM z Systems) 5 (s390x)
Red Hat Enterprise Linux for IBM z Systems
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Red Hat Enterprise Linux for Power
big endian 6 (ppc64) | big endian 7 (ppc64) | little endian 7 (ppc64le) | little endian - Extended Update Support 7.3 (ppc64le) | big endian - Extended Update Support 7.3 (ppc64) | big endian - Extended Update Support 6.7 (ppc64) | little endian - Extended Update Support 7.4 (ppc64le) | big endian - Extended Update Support 7.4 (ppc64)
Red Hat Enterprise Linux for Real Time
Red Hat Enterprise Linux Server
6 (x86_64, i386) | 7 (x86_64) | 4 Year Extended Update Support 7.4 (x86_64) | 4 Year Extended Update Support 7.3 (x86_64) | 4 Year Extended Update Support 7.2 (x86_64)
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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.