CVE-2019-11191

NameCVE-2019-11191
DescriptionThe Linux kernel through 5.0.7, when CONFIG_IA32_AOUT is enabled and ia32_aout is loaded, allows local users to bypass ASLR on setuid a.out programs (if any exist) because install_exec_creds() is called too late in load_aout_binary() in fs/binfmt_aout.c, and thus the ptrace_may_access() check has a race condition when reading /proc/pid/stat. NOTE: the software maintainer disputes that this is a vulnerability because ASLR for a.out format executables has never been supported
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
linux (PTS)buster4.19.249-2vulnerable (unimportant)
buster (security)4.19.304-1vulnerable (unimportant)
bullseye5.10.209-2vulnerable (unimportant)
bullseye (security)5.10.205-2vulnerable (unimportant)
bookworm6.1.76-1vulnerable (unimportant)
bookworm (security)6.1.69-1vulnerable (unimportant)
trixie6.6.15-2vulnerable (unimportant)
sid6.7.9-2vulnerable (unimportant)

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
linuxsource(unstable)(unfixed)unimportant

Notes

https://www.openwall.com/lists/oss-security/2019/04/03/4

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