VulnerabilityModified

CVE-2009-1895

HIGH 7.2EPSS 0.44%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (0.44%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

The 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).

CVSS 2.0: 7.2 HIGHAV:L/AC:L/Au:N/C:C/I:C/A:C
EPSS: 0.44% probability · 37th percentile
CISA KEV: Not listed
Weakness: CWE-16
Affected: linux/linux kernel · debian/debian linux · canonical/ubuntu linux
Source: secalert@redhat.com

References

http://blog.cr0.org/2009/06/bypassing-linux-null-pointer.htmlPatch, Third Party Advisory
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=f9fabcb58a6d26d6efde842d1703ac7cfa9427b6
http://patchwork.kernel.org/patch/32598/Patch, Vendor Advisory
http://secunia.com/advisories/35801Third Party Advisory
http://secunia.com/advisories/36045Third Party Advisory
http://secunia.com/advisories/36051Third Party Advisory
http://secunia.com/advisories/36054Third Party Advisory
http://secunia.com/advisories/36116Third Party Advisory
http://secunia.com/advisories/36131Third Party Advisory
http://secunia.com/advisories/36759Third Party Advisory
http://secunia.com/advisories/37471Third Party Advisory
http://wiki.rpath.com/Advisories:rPSA-2009-0111Third Party Advisory
http://www.debian.org/security/2009/dsa-1844Third Party Advisory
http://www.debian.org/security/2009/dsa-1845Third Party Advisory
http://www.kernel.org/pub/linux/kernel/v2.6/testing/ChangeLog-2.6.31-rc3Vendor Advisory
http://www.mandriva.com/security/advisories?name=MDVSA-2011:051Third Party Advisory
http://www.osvdb.org/55807Broken Link
http://www.redhat.com/support/errata/RHSA-2009-1193.htmlThird Party Advisory
http://www.redhat.com/support/errata/RHSA-2009-1438.htmlThird Party Advisory
http://www.securityfocus.com/archive/1/505254/100/0/threadedThird Party Advisory, VDB Entry
http://www.securityfocus.com/archive/1/507985/100/0/threadedThird Party Advisory, VDB Entry
http://www.securityfocus.com/archive/1/512019/100/0/threadedThird Party Advisory, VDB Entry
http://www.securityfocus.com/bid/35647Third Party Advisory, VDB Entry
http://www.ubuntu.com/usn/usn-807-1Third Party Advisory
http://www.vmware.com/security/advisories/VMSA-2009-0016.htmlThird Party Advisory
http://www.vupen.com/english/advisories/2009/1866Patch, Third Party Advisory
http://www.vupen.com/english/advisories/2009/3316Third Party Advisory
https://bugs.launchpad.net/bugs/cve/2009-1895Third Party Advisory
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11768Third Party Advisory
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A7826Third Party Advisory

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.