CVE-2018-20749

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.

• CWE-787

• http://www.securityfocus.com/bid/106825Broken Link
• https://cert-portal.siemens.com/productcert/pdf/ssa-390195.pdfPatch, Third Party Advisory
• https://github.com/LibVNC/libvncserver/commit/15bb719c03cc70f14c36a843dcb16ed69b405707Patch, Third Party Advisory
• https://github.com/LibVNC/libvncserver/issues/273Issue Tracking, Third Party Advisory
• https://lists.debian.org/debian-lts-announce/2019/01/msg00029.htmlThird Party Advisory
• https://lists.debian.org/debian-lts-announce/2019/10/msg00042.htmlMailing List, Third Party Advisory
• https://usn.ubuntu.com/3877-1/Third Party Advisory
• https://usn.ubuntu.com/4547-1/Third Party Advisory
• https://usn.ubuntu.com/4587-1/Third Party Advisory
• https://www.openwall.com/lists/oss-security/2018/12/10/8Exploit, Mailing List, Third Party Advisory
• http://www.securityfocus.com/bid/106825Broken Link
• https://cert-portal.siemens.com/productcert/pdf/ssa-390195.pdfPatch, Third Party Advisory
• https://github.com/LibVNC/libvncserver/commit/15bb719c03cc70f14c36a843dcb16ed69b405707Patch, Third Party Advisory
• https://github.com/LibVNC/libvncserver/issues/273Issue Tracking, Third Party Advisory
• https://lists.debian.org/debian-lts-announce/2019/01/msg00029.htmlThird Party Advisory
• https://lists.debian.org/debian-lts-announce/2019/10/msg00042.htmlMailing List, Third Party Advisory
• https://usn.ubuntu.com/3877-1/Third Party Advisory
• https://usn.ubuntu.com/4547-1/Third Party Advisory
• https://usn.ubuntu.com/4587-1/Third Party Advisory
• https://www.openwall.com/lists/oss-security/2018/12/10/8Exploit, Mailing List, Third Party Advisory

Published

Jan 30, 2019

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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