CVE-2016-3672

NameCVE-2016-3672
DescriptionThe arch_pick_mmap_layout function in arch/x86/mm/mmap.c in the Linux kernel through 4.5.2 does not properly randomize the legacy base address, which makes it easier for local users to defeat the intended restrictions on the ADDR_NO_RANDOMIZE flag, and bypass the ASLR protection mechanism for a setuid or setgid program, by disabling stack-consumption resource limits.
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-516-1, DSA-3607-1
NVD severitymedium (attack range: local)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
linux (PTS)jessie3.16.56-1+deb8u1fixed
jessie (security)3.16.59-1fixed
stretch4.9.110-1fixed
stretch (security)4.9.110-3+deb9u6fixed
buster, sid4.18.10-2fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
linuxsource(unstable)4.5.1-1medium
linuxsourcejessie3.16.7-ckt25-2+deb8u2mediumDSA-3607-1
linuxsourcewheezy3.2.81-1mediumDLA-516-1

Notes

http://hmarco.org/bugs/CVE-2016-3672-Unlimiting-the-stack-not-longer-disables-ASLR.html
Upstream fix: https://git.kernel.org/linus/8b8addf891de8a00e4d39fc32f93f7c5eb8feceb (v4.6-rc1)

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