Out-of heap-based buffer write flaw was found in the way Graphics Interchange Format (GIF) image format encoder of Byzanz, a desktop recorder, performed encoding of certain Byzanz debug data recordings (ByzanzRecording files) into GIF images. A remote attacker could provide a specially-crafted Byzanz debug data recording file that, when opened in byzanz-playback executable would lead to that executable crash or, potentially, arbitrary code execution with the privileges of the user running the byzanz-playback binary. This issue was found by: Murray McAllister, Red Hat Security Response Team
This issue affects the version of the byzanz package, as shipped with Red Hat Enterprise Linux 6. -- This issue affects the versions of the byzanz package, as shipped with Fedora release of 16 and 17.
Hi Jan, (In reply to Jan Lieskovsky from comment #0) > Out-of heap-based buffer write flaw was found in the way Graphics > Interchange Format (GIF) image format encoder of Byzanz, a desktop recorder, > performed encoding of certain Byzanz debug data recordings (ByzanzRecording > files) into GIF images. A remote attacker could provide a specially-crafted > Byzanz debug data recording file that, when opened in byzanz-playback > executable would lead to that executable crash or, potentially, arbitrary > code execution with the privileges of the user running the byzanz-playback > binary. > > This issue was found by: Murray McAllister, Red Hat Security Response Team Are there more information which you could share? I see Bug 852484 is at least restricted. Are there patches available for this issue in byzanz? Regards, Salvatore
(In reply to Salvatore Bonaccorso from comment #6) > Hi Jan, > > (In reply to Jan Lieskovsky from comment #0) > > Out-of heap-based buffer write flaw was found in the way Graphics > > Interchange Format (GIF) image format encoder of Byzanz, a desktop recorder, > > performed encoding of certain Byzanz debug data recordings (ByzanzRecording > > files) into GIF images. A remote attacker could provide a specially-crafted > > Byzanz debug data recording file that, when opened in byzanz-playback > > executable would lead to that executable crash or, potentially, arbitrary > > code execution with the privileges of the user running the byzanz-playback > > binary. > > > > This issue was found by: Murray McAllister, Red Hat Security Response Team > > Are there more information which you could share? I see Bug 852484 is at > least restricted. Are there patches available for this issue in byzanz? Hello Salvatore, I am not part of Red Hat Product Security Team any more (=> can't share progress done on this issue with you). Please contact secalert for further issue details. Thank you && Regards, Jan. -- Jan iankko Lieskovsky / Red Hat Security Technologies Team > > Regards, > Salvatore
Statement: This issue affects the versions of byzanz as shipped with Red Hat Enterprise Linux 6. Red Hat Product Security has rated this issue as having Moderate security impact. A future update may address this issue. For additional information, refer to the Issue Severity Classification: https://access.redhat.com/security/updates/classification/.
Hello Salvatore, (In reply to Salvatore Bonaccorso from comment #6) > > Are there more information which you could share? I see Bug 852484 is at > least restricted. Are there patches available for this issue in byzanz? Are you still looking for more information on this bug? I see that the needinfo flag was set to a generic internal address so nobody got a notification when it was set. Thank you for your attention, Fábio Olivé
(In reply to Fabio Olive Leite from comment #9) > Hello Salvatore, > > (In reply to Salvatore Bonaccorso from comment #6) > > > > Are there more information which you could share? I see Bug 852484 is at > > least restricted. Are there patches available for this issue in byzanz? > > Are you still looking for more information on this bug? I see that the > needinfo flag was set to a generic internal address so nobody got a > notification when it was set. Hello, I'm the Debian maintainer of byzanz. CVE-2015-2785 was assigned to this bug report but we still don't know anything about the vulnerability. What part of the code is affected? Can someone provide a test case? Are there any patches available? Regards, Markus Koschany