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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 56 | magnus | 1 | Description: CVE-2018-20020 |
| 2 | heap out-of-bound write vulnerability inside structure in VNC client code that |
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| 3 | can result remote code execution |
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| 4 | --- |
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| 5 | |||
| 6 | Author: Abhijith PA <abhijith@debian.org> |
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| 7 | Origin: https://github.com/LibVNC/libvncserver/commit/7b1ef0ffc4815cab9a96c7278394152bdc89dc4d |
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| 8 | Bug: https://github.com/LibVNC/libvncserver/issues/250 |
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| 9 | Bug-Debian: https://bugs.debian.org/916941 |
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| 10 | Last-Update: 2018-12-23 |
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| 11 | |||
| 12 | --- a/vnc_unixsrc/vncviewer/corre.c |
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| 13 | +++ b/vnc_unixsrc/vncviewer/corre.c |
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| 14 | @@ -76,7 +76,7 @@ |
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| 15 | FillRectangle(rx, ry, rw, rh, gcv.foreground); |
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| 16 | #endif |
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| 17 | |||
| 18 | - if (!ReadFromRFBServer(buffer, hdr.nSubrects * (4 + (BPP / 8)))) |
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| 19 | + if (hdr.nSubrects > BUFFER_SIZE / (4 + (BPP / 8)) || !ReadFromRFBServer(buffer, hdr.nSubrects * (4 + (BPP / 8)))) |
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| 20 | return False; |
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| 21 | |||
| 22 | ptr = (CARD8 *)buffer; |