Public bug reported: The vulnerability addressed by xorg-server 1.17.1 is CVE-2015-0255, which was made public today. The newest X.Org CVE is described as: Olivier Fourdan from Red Hat has discovered a protocol handling issue in the way the X server code base handles the XkbSetGeometry request.
The issue stems from the server trusting the client to send valid string lengths in the request data. A malicious client with string lengths exceeding the request length can cause the server to copy adjacent memory data into the XKB structs. This data is then available to the client via the XkbGetGeometry request. The data length is at least up to 64k, it is possible to obtain more data by chaining strings, each string length is then determined by whatever happens to be in that 16-bit region of memory. A similarly crafted request can likely cause the X server to crash. This issue has been assigned CVE-2015-0255 Hope vivid will soon get that upgrade, as it still has 1.16.2.901 ** Affects: xorg (Ubuntu) Importance: Undecided Status: New ** Tags: bot-stop-nagging upgrade-software-version vivid ** Tags added: bot-stop-nagging upgrade-software-version vivid -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1420643 Title: X.Org Server 1.17.1 Released To Fix CVE-2015-0255 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1420643/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp