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2482f8b8dc
Security fixes for: * CVE-2019-8287 * CVE-2019-15678 * CVE-2019-15679 * CVE-2019-15680 mostly adapted from patches fixing similar issues in the actively maintained libvnc (#73970)
20 lines
775 B
Diff
20 lines
775 B
Diff
Adapted from https://github.com/LibVNC/libvncserver/commit/c2c4b81e6cb3b485fb1ec7ba9e7defeb889f6ba7
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diff --git a/vncviewer/rfbproto.c b/vncviewer/rfbproto.c
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index 04b0230..bd11b54 100644
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--- a/vncviewer/rfbproto.c
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+++ b/vncviewer/rfbproto.c
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@@ -303,7 +303,12 @@ InitialiseRFBConnection(void)
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si.format.blueMax = Swap16IfLE(si.format.blueMax);
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si.nameLength = Swap32IfLE(si.nameLength);
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- /* FIXME: Check arguments to malloc() calls. */
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+ if (si.nameLength > 1<<20) {
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+ fprintf(stderr, "Too big desktop name length sent by server: %lu B > 1 MB\n",
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+ (unsigned long)si.nameLength);
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+ return False;
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+ }
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+
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desktopName = malloc(si.nameLength + 1);
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if (!desktopName) {
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fprintf(stderr, "Error allocating memory for desktop name, %lu bytes\n",
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