CPU Side-Channel Information Disclosure Vulnerabilities
2018 January 4 17:27 GMT
Security Activity Bulletin
Security Activity Bulletin
CPU hardware contains multiple vulnerabilities that could allow a local attacker to execute arbitrary code with user privileges and gain access to sensitive information on a targeted system.
The vulnerabilities are due to side-channel attacks, which are also referred to as Meltdown and Spectre attacks. A local attacker could exploit these vulnerabilities by executing arbitrary code with user privileges on the affected CPU. A successful exploit could allow the attacker to gain access to sensitive information on the targeted system, including accessing virtual memory and cache contents.
Proof-of-concept code that demonstrates an exploit of these vulnerabilities is publicly available.
Administrators are advised to contact the vendor regarding future updates and releases.
Administrators are advised to monitor affected systems.
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.
CentOS packages can be updated by using the up2date or yum command.
Google has released software updates at the following link: Google Updates
KB-CERT has confirmed this vulnerability at the following link: VU#584653
Microsoft has released detailed information at the following link: ADV180002
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.
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.
VMware has released a security advisory at the following link: VMSA-2018-0002
Xen has released a security advisory at the following link: XSA-254
6 (s390x) | 7 (s390x) | Extended Update Support 7.3 (s390x) | Extended Update Support 6.7 (s390x) | Extended Update Support 7.4 (s390x)
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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