From 9c855993eb92e8d569e35698fb4f632e2e4de52c Mon Sep 17 00:00:00 2001 From: Max Rees Date: Wed, 18 Mar 2020 15:23:00 -0500 Subject: user/libvncserver: patch CVE-2019-15681 and CVE-2019-15690 --- user/libvncserver/CVE-2019-15690.patch | 36 ++++++++++++++++++++++++++++++++++ 1 file changed, 36 insertions(+) create mode 100644 user/libvncserver/CVE-2019-15690.patch (limited to 'user/libvncserver/CVE-2019-15690.patch') diff --git a/user/libvncserver/CVE-2019-15690.patch b/user/libvncserver/CVE-2019-15690.patch new file mode 100644 index 000000000..7fe36e454 --- /dev/null +++ b/user/libvncserver/CVE-2019-15690.patch @@ -0,0 +1,36 @@ +From 54220248886b5001fbbb9fa73c4e1a2cb9413fed Mon Sep 17 00:00:00 2001 +From: Christian Beier +Date: Sun, 17 Nov 2019 17:18:35 +0100 +Subject: [PATCH] libvncclient/cursor: limit width/height input values + +Avoids a possible heap overflow reported by Pavel Cheremushkin +. + +re #275 +--- + libvncclient/cursor.c | 5 +++++ + 1 file changed, 5 insertions(+) + +diff --git a/libvncclient/cursor.c b/libvncclient/cursor.c +index 67f45726..40ffb3b0 100644 +--- a/libvncclient/cursor.c ++++ b/libvncclient/cursor.c +@@ -28,6 +28,8 @@ + #define OPER_SAVE 0 + #define OPER_RESTORE 1 + ++#define MAX_CURSOR_SIZE 1024 ++ + #define RGB24_TO_PIXEL(bpp,r,g,b) \ + ((((uint##bpp##_t)(r) & 0xFF) * client->format.redMax + 127) / 255 \ + << client->format.redShift | \ +@@ -54,6 +56,9 @@ rfbBool HandleCursorShape(rfbClient* client,int xhot, int yhot, int width, int h + if (width * height == 0) + return TRUE; + ++ if (width >= MAX_CURSOR_SIZE || height >= MAX_CURSOR_SIZE) ++ return FALSE; ++ + /* Allocate memory for pixel data and temporary mask data. */ + if(client->rcSource) + free(client->rcSource); -- cgit v1.2.3-70-g09d2