Multiple integer overflows in the (1) vnc_connection_server_message and (2) vnc_color_map_set functions in gtk-vnc before 0.7.0 allow remote servers to cause a denial of service (crash) or possibly execute arbitrary code via vectors involving SetColorMapEntries, which triggers a buffer overflow.
The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.
| Link | Tags |
|---|---|
| https://git.gnome.org/browse/gtk-vnc/commit/?id=c8583fd3783c5b811590fcb7bae4ce6e7344963e | patch vendor advisory issue tracking |
| http://www.openwall.com/lists/oss-security/2017/02/03/5 | third party advisory mailing list |
| http://www.securityfocus.com/bid/96016 | third party advisory vdb entry |
| https://access.redhat.com/errata/RHSA-2017:2258 | vendor advisory |
| https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LGPQ5MQR6SN4DYTEFACHP2PP5RR26KYK/ | vendor advisory |
| http://www.openwall.com/lists/oss-security/2017/02/05/5 | third party advisory mailing list |
| https://bugzilla.gnome.org/show_bug.cgi?id=778050 | vendor advisory issue tracking exploit |