CVE-2009-1895

NameCVE-2009-1895
DescriptionThe personality subsystem in the Linux kernel before 2.6.31-rc3 has a PER_CLEAR_ON_SETID setting that does not clear the ADDR_COMPAT_LAYOUT and MMAP_PAGE_ZERO flags when executing a setuid or setgid program, which makes it easier for local users to leverage the details of memory usage to (1) conduct NULL pointer dereference attacks, (2) bypass the mmap_min_addr protection mechanism, or (3) defeat address space layout randomization (ASLR).
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
ReferencesDSA-1844-1, DSA-1845-1

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
linux-2.6sourceetch(not affected)
linux-2.6sourcelenny2.6.26-17lenny1DSA-1845-1
linux-2.6source(unstable)2.6.30-3low
linux-2.6.24sourceetch2.6.24-6~etchnhalf.8etch2DSA-1844-1
linux-2.6.24source(unstable)(unfixed)

Notes

[etch] - linux-2.6 <not-affected> (mmap_min_addr first indroduced in 2.6.23)

Search for package or bug name: Reporting problems