On Mon, May 18, 2009 at 02:20:20PM -0400, Michael S. Gilbert wrote: > On Mon, 18 May 2009 11:52:04 -0600, dann frazier wrote: > > On Mon, May 18, 2009 at 01:28:56PM -0400, Michael S. Gilbert wrote: > > > Package: linux-2.6 > > > Version: 2.6.26-15lenny2 > > > Severity: important > > > Tags: security > > > > > > Hi, > > > > > > The following CVE (Common Vulnerabilities & Exposures) id was > > > published for linux-2.6. > > > > > > CVE-2009-0787[0]: > > > | The ecryptfs_write_metadata_to_contents function in the eCryptfs > > > | functionality in the Linux kernel 2.6.28 before 2.6.28.9 uses an > > > | incorrect size when writing kernel memory to an eCryptfs file header, > > > | which triggers an out-of-bounds read and allows local users to obtain > > > | portions of kernel memory. > > > > > > If you fix the vulnerability please also make sure to include the > > > CVE id in your changelog entry. > > > > > > For further information see: > > > > > > [0] http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0787 > > > http://security-tracker.debian.net/tracker/CVE-2009-0787 > > > > This issue supposedly only affected 2.6.28 - do you have information > > to the contrary? > > yes, i have studied the code/patches for this issue. the 2.6.26 > ecryptfs kernel code is identical to that of the affected 2.6.28 code. > hence, it is my assessment that 2.6.26 is vulnerable. > > i anticipate that this also affects etch-and-a-half (2.6.24) as well, > but i have not checked yet.
My understanding is that this issue was introduced by 87b811c (in 2.6.28), which resulted in only a single page getting allocated for the headers even though the size of the headers maybe > the page size. -- dann frazier -- To UNSUBSCRIBE, email to debian-kernel-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
