CVE-2017-5754

Source
Severity High
Remote No
Type Access restriction bypass
Description
An industry-wide issue was found in the way many modern microprocessor designs have implemented speculative execution of instructions (a commonly used performance optimization).
This variant ("Rogue Data Load") relies on the fact that, on impacted microprocessors, during speculative execution of instruction permission faults, exception generation triggered by a faulting access is suppressed until the retirement of the whole instruction block. In a combination with the fact that memory accesses may populate the cache even when the block is being dropped and never committed (executed), an unprivileged local attacker could use this flaw to read memory from arbitrary addresses, including privileged (kernel space) and all other processes running on the system by conducting targeted cache side-channel attacks.
Group Package Affected Fixed Severity Status Ticket
AVG-585 nvidia-340xx-dkms 340.104-20 High Vulnerable
AVG-584 nvidia-dkms 340.104-20 High Vulnerable
AVG-581 nvidia-340xx-lts 340.104-7 High Vulnerable
AVG-580 nvidia-340xx 340.104-20 High Vulnerable
AVG-579 nvidia-lts 387.34-5 High Vulnerable
AVG-578 nvidia 387.34-18 High Vulnerable
AVG-577 linux-lts 4.9.74-1 4.9.75-1 High Fixed
AVG-574 linux-hardened 4.14.7.a-1 4.14.11.a-1 High Fixed FS#56832
AVG-571 linux-zen 4.14.7-1 4.14.11-1 High Fixed FS#56832
AVG-552 linux 4.14.7-1 4.14.11-1 High Fixed FS#56832
Date Advisory Group Package Severity Description
08 Jan 2018 ASA-201801-6 AVG-577 linux-lts High access restriction bypass
05 Jan 2018 ASA-201801-4 AVG-574 linux-hardened High multiple issues
05 Jan 2018 ASA-201801-3 AVG-571 linux-zen High multiple issues
05 Jan 2018 ASA-201801-1 AVG-552 linux High multiple issues
References
https://googleprojectzero.blogspot.com/2018/01/reading-privileged-memory-with-side.html
https://meltdownattack.com
https://www.kb.cert.org/vuls/id/584653
https://xenbits.xen.org/xsa/advisory-254.html
http://blog.cyberus-technology.de/posts/2018-01-03-meltdown.html
https://01.org/security/advisories/intel-oss-10003
https://newsroom.intel.com/wp-content/uploads/sites/11/2018/01/Intel-Analysis-of-Speculative-Execution-Side-Channels.pdf
https://git.kernel.org/linus/5aa90a84589282b87666f92b6c3c917c8080a9bf
https://git.kernel.org/linus/00a5ae218d57741088068799b810416ac249a9ce
Notes
Affected: Intel x86-64 microprocessors
Not affected: AMD x86-64 microprocessors
Related issues: CVE-2017-5753 CVE-2017-5715