SARA / Free Tools / CVE / CVE-2018-20750

CVE-2018-20750 — LibVNC through 0

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.

CVSS

— —

EPSS

10.37% (top 6.90%)

CWE

—

Published

2019-01-30T18:00:00.000Z

Last modified

2024-08-05T12:12:28.351Z

CVSS vector

—

01What is this vulnerability?

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.

Vendor	Product	Versions
n	a / n/a	n/a

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

Patch to a fixed version listed in the vendor advisory (see references below).
Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
Hunt historical logs for exploitation indicators — see Detection signatures below.

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

lists.debian.org — https://lists.debian.org/debian-lts-announce/2019/01/msg00029.html
www.securityfocus.com — http://www.securityfocus.com/bid/106825
github.com — https://github.com/LibVNC/libvncserver/issues/273
github.com — https://github.com/LibVNC/libvncserver/commit/09e8fc02f59f16e2583b34fe1a270c238b…
usn.ubuntu.com — https://usn.ubuntu.com/3877-1/
www.openwall.com — https://www.openwall.com/lists/oss-security/2018/12/10/8
lists.debian.org — https://lists.debian.org/debian-lts-announce/2019/10/msg00042.html
usn.ubuntu.com — https://usn.ubuntu.com/4547-1/
usn.ubuntu.com — https://usn.ubuntu.com/4587-1/
cert-portal.siemens.com — https://cert-portal.siemens.com/productcert/pdf/ssa-390195.pdf

Want this in your SOAR or SIEM?
SARA's API returns EPSS, CVSS, KEV, and an analyst-grade summary in one call.