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CVE-2018-20020
LibVNC before commit 7b1ef0ffc4815cab9a96c7278394152bdc89dc4d contains heap out-of-bound write vulnerability inside structure in VNC…
Critical9.8EPSS 8.8%
- Published
- Updated
- Reserved
- Assigned by
- Kaspersky
Description
LibVNC before commit 7b1ef0ffc4815cab9a96c7278394152bdc89dc4d contains heap out-of-bound write vulnerability inside structure in VNC client code that can result remote code execution
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.0 | Critical9.8 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 8.8% · top 4.8% of all CVEs (5 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.8.
Weakness
- Heap Out-of-Bound write
- CWE-787 (opens in a new tab)All about CWE-787 and its CVEs
Affected products
LibVNC
- affected commit 7b1ef0ffc4815cab9a96c7278394152bdc89dc4d
References (11)
- DSA-4383 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
- [debian-lts-announce] 20181227 [SECURITY] [DLA 1617-1] libvncserver security update (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- USN-3877-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- https://ics-cert.kaspersky.com/advisories/klcert-advisories/2018/12/19/klcert-18-030-libvnc-heap-out-of-bound-write/ (opens in a new tab)x_refsource_MISCx_transferred
- GLSA-201908-05 (opens in a new tab)vendor-advisoryx_refsource_GENTOOx_transferred
- [debian-lts-announce] 20191030 [SECURITY] [DLA 1979-1] italc security update (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- [debian-lts-announce] 20191129 [SECURITY] [DLA 2016-1] ssvnc security update (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- GLSA-202006-06 (opens in a new tab)vendor-advisoryx_refsource_GENTOOx_transferred
- USN-4547-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- USN-4547-2 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- USN-4587-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2018-20020)Record last updated .