CVE-2018-7225
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 specially crafted VNC packets.
Key facts
- CVSS score
- 9.8 (v3.0)
- Severity
- CRITICAL
- CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H- Weakness (CWE)
- CWE-190
- EPSS score
- 6.1% (93th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2018-18964)
- Published
- February 19, 2018
- NVD last modified
- June 17, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2018-18964 in the EU Vulnerability Database. Last updated in EUVD on August 5, 2024.
View on the EU Vulnerability DatabaseAffected products
- canonical / ubuntu linux
- canonical / ubuntu linux
- canonical / ubuntu linux
- debian / debian linux
- debian / debian linux
- debian / debian linux
- libvncserver project / libvncserver
- redhat / enterprise linux desktop
- redhat / enterprise linux server
- redhat / enterprise linux server aus
- redhat / enterprise linux server eus
- redhat / enterprise linux server eus
- redhat / enterprise linux server tus
- redhat / enterprise linux workstation
Certified products that may be affected
1 FIPS 140 or Common Criteria certified product, from automated matching by sec-certs.org.
- Red Hat Enterprise Linux 7.6 - Red Hat, Inc. - Common Criteria CCEVS-VR-VID-11039-2020 - archived
References
- http://www.openwall.com/lists/oss-security/2018/02/18/1(Exploit, Mailing List, Third Party Advisory)
- http://www.securityfocus.com/bid/103107(Third Party Advisory, VDB Entry)
- https://access.redhat.com/errata/RHSA-2018:1055(Third Party Advisory)
- https://github.com/LibVNC/libvncserver/issues/218(Third Party Advisory)
- https://lists.debian.org/debian-lts-announce/2018/03/msg00035.html(Mailing List, Third Party Advisory)
- https://lists.debian.org/debian-lts-announce/2019/10/msg00042.html
- https://lists.debian.org/debian-lts-announce/2019/11/msg00032.html
- https://lists.debian.org/debian-lts-announce/2019/12/msg00028.html
- https://security.gentoo.org/glsa/201908-05
- https://usn.ubuntu.com/3618-1/(Third Party Advisory)
- https://usn.ubuntu.com/4547-1/
- https://usn.ubuntu.com/4573-1/
- https://usn.ubuntu.com/4587-1/
- https://www.debian.org/security/2018/dsa-4221(Third Party Advisory)
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
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