CVE-2018-3639

NameCVE-2018-3639
DescriptionSystems with microprocessors utilizing speculative execution and speculative execution of memory reads before the addresses of all prior memory writes are known may allow unauthorized disclosure of information to an attacker with local user access via a side-channel analysis, aka Speculative Store Bypass (SSB), Variant 4.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
ReferencesDLA-1423-1, DLA-1446-1, DSA-4210-1, DSA-4273-1
NVD severitymedium (attack range: local)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
intel-microcode (PTS)jessie/non-free3.20180425.1~deb8u1vulnerable
stretch/non-free3.20180425.1~deb9u1vulnerable
buster/non-free, sid/non-free3.20180703.2fixed
jessie/non-free (security)3.20180703.2~deb8u1fixed
stretch/non-free (security)3.20180703.2~deb9u1fixed
linux (PTS)jessie3.16.56-1+deb8u1vulnerable
jessie (security)3.16.57-2vulnerable
stretch4.9.110-1fixed
stretch (security)4.9.110-3+deb9u3fixed
buster4.17.14-1fixed
sid4.17.17-1fixed
linux-4.9 (PTS)jessie (security)4.9.110-3+deb9u2~deb8u1fixed
xen (PTS)jessie (security), jessie4.4.1-9+deb8u10vulnerable
stretch (security)4.8.4+xsa273+shim4.10.1+xsa273-1+deb9u10fixed
buster, stretch, sid4.8.3+xsa267+shim4.10.1+xsa267-1+deb9u9fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
intel-microcodesource(unstable)3.20180703.1medium
intel-microcodesourcejessie3.20180703.2~deb8u1mediumDLA-1446-1
intel-microcodesourcestretch3.20180703.2~deb9u1mediumDSA-4273-1
linuxsource(unstable)4.16.12-1medium
linuxsourcestretch4.9.107-1medium
linux-4.9sourcejessie4.9.110-1~deb8u1mediumDLA-1423-1
xensource(unstable)4.8.3+xsa262+shim4.10.0+comet3-1+deb9u7medium
xensourcestretch4.8.3+xsa262+shim4.10.0+comet3-1+deb9u7mediumDSA-4210-1

Notes

[wheezy] - linux <ignored> (Too much work to backport)
https://xenbits.xen.org/xsa/advisory-263.html
https://bugs.chromium.org/p/project-zero/issues/detail?id=1528
https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00115.html
The fixed version for intel-microcode designates the first batch of updates which targeted most server CPUs,
later followup releases (for some desktop class CPUs) will be commented separately

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