Libvncserver
by Libvncserver
Source repositories
CVEs (45)
| CVE | Vendor / Product | Sev | Risk | CVSS | EPSS | KEV | Published | Description |
|---|---|---|---|---|---|---|---|---|
| CVE-2017-18922 | Cri | 0.64 | 9.8 | 0.02 | Jun 30, 2020 | It was discovered that websockets.c in LibVNCServer prior to 0.9.12 did not properly decode certain WebSocket frames. A malicious attacker could exploit this by sending specially crafted WebSocket frames to a server, causing a heap-based buffer overflow. | ||
| CVE-2018-20750 | Cri | 0.64 | 9.8 | 0.03 | Jan 30, 2019 | LibVNC through 0.9.12 contains a heap out-of-bounds write vulnerability in libvncserver/rfbserver.c. The fix for CVE-2018-15127 was incomplete. | ||
| CVE-2018-20749 | Cri | 0.64 | 9.8 | 0.03 | Jan 30, 2019 | LibVNC before 0.9.12 contains a heap out-of-bounds write vulnerability in libvncserver/rfbserver.c. The fix for CVE-2018-15127 was incomplete. | ||
| CVE-2018-20748 | Cri | 0.64 | 9.8 | 0.03 | Jan 30, 2019 | LibVNC before 0.9.12 contains multiple heap out-of-bounds write vulnerabilities in libvncclient/rfbproto.c. The fix for CVE-2018-20019 was incomplete. | ||
| CVE-2018-7225 | Cri | 0.64 | 9.8 | 0.06 | Feb 19, 2018 | An issue was discovered in LibVNCServer through 0.9.11. rfbProcessClientNormalMessage() in rfbserver.c does not sanitize msg.cct.length, leading to access to uninitialized and potentially sensitive data or possibly unspecified other impact (e.g., an integer overflow) via… | ||
| CVE-2016-9942 | Cri | 0.64 | 9.8 | 0.04 | Dec 31, 2016 | Heap-based buffer overflow in ultra.c in LibVNCClient in LibVNCServer before 0.9.11 allows remote servers to cause a denial of service (application crash) or possibly execute arbitrary code via a crafted FramebufferUpdate message with the Ultra type tile, such that the LZO… | ||
| CVE-2016-9941 | Cri | 0.64 | 9.8 | 0.04 | Dec 31, 2016 | Heap-based buffer overflow in rfbproto.c in LibVNCClient in LibVNCServer before 0.9.11 allows remote servers to cause a denial of service (application crash) or possibly execute arbitrary code via a crafted FramebufferUpdate message containing a subrectangle outside of the… | ||
| CVE-2018-15127 | Cri | 0.58 | 9.8 | 0.15 | Dec 19, 2018 | LibVNC before commit 502821828ed00b4a2c4bef90683d0fd88ce495de contains heap out-of-bound write vulnerability in server code of file transfer extension that can result remote code execution | ||
| CVE-2018-15126 | Cri | 0.58 | 9.8 | 0.12 | Dec 19, 2018 | LibVNC before commit 73cb96fec028a576a5a24417b57723b55854ad7b contains heap use-after-free vulnerability in server code of file transfer extension that can result remote code execution | ||
| CVE-2026-50538 | Hig | 0.57 | 8.8 | 0.01 | Aug 21, 2026 | LibVNCClient is a library for easy implementation of a VNC client. In versions 0.9.12 through 0.9.15, a malicious (or man-in-the-middle) VNC server can force a connecting `libvncclient` to write attacker-controlled data past the end of its framebuffer. This is an out-of-bounds… | ||
| CVE-2019-15690 | Hig | 0.57 | 8.8 | 0.01 | Jan 24, 2025 | LibVNCServer 0.9.12 release and earlier contains heap buffer overflow vulnerability within the HandleCursorShape() function in libvncclient/cursor.c. An attacker sends cursor shapes with specially crafted dimensions, which can result in remote code execution. | ||
| CVE-2019-20788 | Cri | 0.57 | 9.8 | 0.03 | Apr 23, 2020 | libvncclient/cursor.c in LibVNCServer through 0.9.12 has a HandleCursorShape integer overflow and heap-based buffer overflow via a large height or width value. NOTE: this may overlap CVE-2019-15690. | ||
| CVE-2018-20020 | Cri | 0.57 | 9.8 | 0.09 | Dec 19, 2018 | LibVNC before commit 7b1ef0ffc4815cab9a96c7278394152bdc89dc4d contains heap out-of-bound write vulnerability inside structure in VNC client code that can result remote code execution | ||
| CVE-2018-20019 | Cri | 0.57 | 9.8 | 0.09 | Dec 19, 2018 | LibVNC before commit a83439b9fbe0f03c48eb94ed05729cb016f8b72f contains multiple heap out-of-bound write vulnerabilities in VNC client code that can result remote code execution | ||
| CVE-2026-44988 | Hig | 0.50 | 8.8 | 0.00 | May 27, 2026 | LibVNCClient is a library for easy implementation of a VNC client. In 0.9.15 and earlier, LibVNCClient's Tight encoding decoder uses fixed-size 2048-pixel scratch buffers for the Gradient filter, but it does not reject Tight rectangles whose width is larger than 2048 pixels. A… | ||
| CVE-2020-29260 | Hig | 0.49 | 7.5 | 0.01 | Sep 2, 2022 | libvncclient v0.9.13 was discovered to contain a memory leak via the function rfbClientCleanup(). | ||
| CVE-2020-25708 | Hig | 0.49 | 7.5 | 0.02 | Nov 27, 2020 | A divide by zero issue was found to occur in libvncserver-0.9.12. A malicious client could use this flaw to send a specially crafted message that, when processed by the VNC server, would lead to a floating point exception, resulting in a denial of service. | ||
| CVE-2020-14400 | Hig | 0.49 | 7.5 | 0.03 | Jun 17, 2020 | An issue was discovered in LibVNCServer before 0.9.13. Byte-aligned data is accessed through uint16_t pointers in libvncserver/translate.c. NOTE: Third parties do not consider this to be a vulnerability as there is no known path of exploitation or cross of a trust boundary | ||
| CVE-2020-14399 | Hig | 0.49 | 7.5 | 0.03 | Jun 17, 2020 | An issue was discovered in LibVNCServer before 0.9.13. Byte-aligned data is accessed through uint32_t pointers in libvncclient/rfbproto.c. NOTE: there is reportedly "no trust boundary crossed. | ||
| CVE-2020-14398 | Hig | 0.49 | 7.5 | 0.03 | Jun 17, 2020 | An issue was discovered in LibVNCServer before 0.9.13. An improperly closed TCP connection causes an infinite loop in libvncclient/sockets.c. |
- risk 0.64cvss 9.8epss 0.02
It was discovered that websockets.c in LibVNCServer prior to 0.9.12 did not properly decode certain WebSocket frames. A malicious attacker could exploit this by sending specially crafted WebSocket frames to a server, causing a heap-based buffer overflow.
- risk 0.64cvss 9.8epss 0.03
LibVNC through 0.9.12 contains a heap out-of-bounds write vulnerability in libvncserver/rfbserver.c. The fix for CVE-2018-15127 was incomplete.
- risk 0.64cvss 9.8epss 0.03
LibVNC before 0.9.12 contains a heap out-of-bounds write vulnerability in libvncserver/rfbserver.c. The fix for CVE-2018-15127 was incomplete.
- risk 0.64cvss 9.8epss 0.03
LibVNC before 0.9.12 contains multiple heap out-of-bounds write vulnerabilities in libvncclient/rfbproto.c. The fix for CVE-2018-20019 was incomplete.
- risk 0.64cvss 9.8epss 0.06
An issue was discovered in LibVNCServer through 0.9.11. rfbProcessClientNormalMessage() in rfbserver.c does not sanitize msg.cct.length, leading to access to uninitialized and potentially sensitive data or possibly unspecified other impact (e.g., an integer overflow) via…
- risk 0.64cvss 9.8epss 0.04
Heap-based buffer overflow in ultra.c in LibVNCClient in LibVNCServer before 0.9.11 allows remote servers to cause a denial of service (application crash) or possibly execute arbitrary code via a crafted FramebufferUpdate message with the Ultra type tile, such that the LZO…
- risk 0.64cvss 9.8epss 0.04
Heap-based buffer overflow in rfbproto.c in LibVNCClient in LibVNCServer before 0.9.11 allows remote servers to cause a denial of service (application crash) or possibly execute arbitrary code via a crafted FramebufferUpdate message containing a subrectangle outside of the…
- risk 0.58cvss 9.8epss 0.15
LibVNC before commit 502821828ed00b4a2c4bef90683d0fd88ce495de contains heap out-of-bound write vulnerability in server code of file transfer extension that can result remote code execution
- risk 0.58cvss 9.8epss 0.12
LibVNC before commit 73cb96fec028a576a5a24417b57723b55854ad7b contains heap use-after-free vulnerability in server code of file transfer extension that can result remote code execution
- risk 0.57cvss 8.8epss 0.01
LibVNCClient is a library for easy implementation of a VNC client. In versions 0.9.12 through 0.9.15, a malicious (or man-in-the-middle) VNC server can force a connecting `libvncclient` to write attacker-controlled data past the end of its framebuffer. This is an out-of-bounds…
- risk 0.57cvss 8.8epss 0.01
LibVNCServer 0.9.12 release and earlier contains heap buffer overflow vulnerability within the HandleCursorShape() function in libvncclient/cursor.c. An attacker sends cursor shapes with specially crafted dimensions, which can result in remote code execution.
- risk 0.57cvss 9.8epss 0.03
libvncclient/cursor.c in LibVNCServer through 0.9.12 has a HandleCursorShape integer overflow and heap-based buffer overflow via a large height or width value. NOTE: this may overlap CVE-2019-15690.
- risk 0.57cvss 9.8epss 0.09
LibVNC before commit 7b1ef0ffc4815cab9a96c7278394152bdc89dc4d contains heap out-of-bound write vulnerability inside structure in VNC client code that can result remote code execution
- risk 0.57cvss 9.8epss 0.09
LibVNC before commit a83439b9fbe0f03c48eb94ed05729cb016f8b72f contains multiple heap out-of-bound write vulnerabilities in VNC client code that can result remote code execution
- risk 0.50cvss 8.8epss 0.00
LibVNCClient is a library for easy implementation of a VNC client. In 0.9.15 and earlier, LibVNCClient's Tight encoding decoder uses fixed-size 2048-pixel scratch buffers for the Gradient filter, but it does not reject Tight rectangles whose width is larger than 2048 pixels. A…
- risk 0.49cvss 7.5epss 0.01
libvncclient v0.9.13 was discovered to contain a memory leak via the function rfbClientCleanup().
- risk 0.49cvss 7.5epss 0.02
A divide by zero issue was found to occur in libvncserver-0.9.12. A malicious client could use this flaw to send a specially crafted message that, when processed by the VNC server, would lead to a floating point exception, resulting in a denial of service.
- risk 0.49cvss 7.5epss 0.03
An issue was discovered in LibVNCServer before 0.9.13. Byte-aligned data is accessed through uint16_t pointers in libvncserver/translate.c. NOTE: Third parties do not consider this to be a vulnerability as there is no known path of exploitation or cross of a trust boundary
- risk 0.49cvss 7.5epss 0.03
An issue was discovered in LibVNCServer before 0.9.13. Byte-aligned data is accessed through uint32_t pointers in libvncclient/rfbproto.c. NOTE: there is reportedly "no trust boundary crossed.
- risk 0.49cvss 7.5epss 0.03
An issue was discovered in LibVNCServer before 0.9.13. An improperly closed TCP connection causes an infinite loop in libvncclient/sockets.c.
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