A flaw was found in LibRaw versions prior to 0.18.9. An error within the "find_green()" function (internal/dcraw_common.cpp) can be exploited to cause a stack-based buffer overflow and subsequently execute arbitrary code. References: https://github.com/LibRaw/LibRaw/blob/master/Changelog.txt https://secuniaresearch.flexerasoftware.com/advisories/81800/ https://secuniaresearch.flexerasoftware.com/secunia_research/2018-9/ Upstream commit: https://github.com/LibRaw/LibRaw/commit/fd6330292501983ac75fe4162275794b18445bd9
Created LibRaw tracking bugs for this issue: Affects: epel-6 [bug 1661519]
Increase Impact of the flaw to Important and set C:H/I:H/A:H because arbitrary code execution may be possible on affected versions.
RHEL 7 is not affected by this flaw because the attacker does not have control over the width field as find_green() function is always called after hardcoding values in width/height fields that are less then 2064.
On the affected versions, function find_green() in internal/dcraw_common.cpp does not correctly check the "width" value, which is used to read/write from/to an array of 2064 elements. By providing a specially crafted image that is able to reach the find_green() function with a width greater than 2064, an attacker could overwrite data on the stack and execute arbitrary code.
Statement: This issue did not affect the versions of LibRaw as shipped with Red Hat Enterprise Linux 7 as it does not allow an attacker enough control to corrupt the internal state.