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Candidate: CVE-2009-2695
Description:
The Linux kernel before 2.6.31-rc7 does not properly prevent mmap operations that
target page zero and other low memory addresses, which allows local users to gain
privileges by exploiting NULL pointer dereference vulnerabilities, related to (1)
the default configuration of the allow_unconfined_mmap_low boolean in SELinux on
Red Hat Enterprise Linux (RHEL) 5, (2) an error that causes
allow_unconfined_mmap_low to be ignored in the unconfined_t domain, (3) lack of a
requirement for the CAP_SYS_RAWIO capability for these mmap operations, and (4)
interaction between the mmap_min_addr protection mechanism and certain application
programs.
References:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-2695
Ubuntu-Description:
Notes:
Bugs:
upstream: released (2.6.31-rc7)
linux-2.6: released (2.6.31-1)
2.6.18-etch-security: N/A "no mmap_min_addr"
2.6.24-etch-security: released (2.6.24-6~etchnhalf.9etch3) [bugfix/all/security-use-mmap_min_addr-independently-of-security-models.patch, bugfix/all/selinux-call-cap_file_mmap-in-selinux_file_mmap.patch, bugfix/all/capabilities-move-cap_file_mmap-to-commoncap.c.patch, bugfix/all/security-seperate-lsm-specific-mmap_min_addr.patch, bugfix/all/security-define-round_hint_to_min-when-CONFIG_SECURITY-is-off.patch]
2.6.26-lenny-security: released (2.6.26-19lenny1) [bugfix/all/security-use-mmap_min_addr-independently-of-security-models.patch, bugfix/all/selinux-call-cap_file_mmap-in-selinux_file_mmap.patch, bugfix/all/capabilities-move-cap_file_mmap-to-commoncap.c.patch, bugfix/all/security-seperate-lsm-specific-mmap_min_addr.patch, bugfix/all/security-define-round_hint_to_min-when-CONFIG_SECURITY-is-off.patch]
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