kernel

• Author: Miklos Vajna
• Vulnerable: 2.6.28-6anacreon1
• Unaffected: 2.6.28-6anacreon2

1. 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).
2. Stack-based buffer overflow in the parse_tag_11_packet function in fs/ecryptfs/keystore.c in the eCryptfs subsystem in the Linux kernel before 2.6.30.4 allows local users to cause a denial of service (system crash) or possibly gain privileges via vectors involving a crafted eCryptfs file, related to not ensuring that the key signature length in a Tag 11 packet is compatible with the key signature buffer size.
3. Heap-based buffer overflow in the parse_tag_3_packet function in fs/ecryptfs/keystore.c in the eCryptfs subsystem in the Linux kernel before 2.6.30.4 allows local users to cause a denial of service (system crash) or possibly gain privileges via vectors involving a crafted eCryptfs file, related to a large encrypted key size in a Tag 3 packet.

• Bug Tracker URL: http://bugs.frugalware.org/task/3881

CVEs:

• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-1895
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-2406
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-2407