An integer overflow may occur in the computation of the size of the
glyph to be allocated by the AllocateGlyph() function which will cause
less memory to be allocated than expected, leading to later heap
overflow.
On systems where the X SIGSEGV handler includes a stack trace, more
malloc()-type functions are called, which may lead to other
exploitable issues.
(cherry picked from commit b1a4a96885)
An integer overflow may occur in the computation of the size of the
glyph to be allocated by the AllocateGlyph() function which will cause
less memory to be allocated than expected, leading to later heap
overflow.
On systems where the X SIGSEGV handler includes a stack trace, more
malloc()-type functions are called, which may lead to other
exploitable issues.
(cherry picked from commit b1a4a96885)
Integer overflows can occur in the code validating the parameters for
the SProcRenderCreateLinearGradient, SProcRenderCreateRadialGradient
and SProcRenderCreateConicalGradient functions, leading to memory
corruption by swapping bytes outside of the intended request
parameters.
(cherry picked from commit 9171206db3)
An integer overflow may occur in the computation of the size of the
glyph to be allocated by the ProcRenderCreateCursor() function which
will cause less memory to be allocated than expected, leading later to
dereferencing un-mapped memory, causing a crash of the X server.
(cherry picked from commit 5257a0f83d)
An integer overflow in the validation of the parameters of the
ShmPutImage() request makes it possible to trigger the copy of
arbitrary server memory to a pixmap that can subsequently be read by
the client, to read arbitrary parts of the X server memory space.
(cherry picked from commit 063f18ef6d)
Lack of validation of the parameters of the
SProcSecurityGenerateAuthorization SProcRecordCreateContext
functions makes it possible for a specially crafted request to trigger
the swapping of bytes outside the parameter of these requests, causing
memory corruption.
(cherry picked from commit 95d162c438)
