CVE-2019-15680
TightVNC code version 1.3.10 contains null pointer dereference in HandleZlibBPP function, which results Denial of System (DoS). This attack appear to be exploitable via network connectivity.
02 Description
TightVNC code version 1.3.10 contains null pointer dereference in HandleZlibBPP function, which results Denial of System (DoS). This attack appear to be exploitable via network connectivity.
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 2.66% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 85.4% of scored records. A rank, not a probability.
- NVD base score
- 7.5 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- Red Hat severity
- No Red Hat rating. Red Hat rates the CVEs that affect its products.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2019-10-29 16:45Z7 YR AGO
- Last updated
- 2024-08-05 00:56Z2 YR AGO
- Reserved
- 2019-08-27
- Assigning CNA
- Kaspersky
- Record state
- PUBLISHED
- Severity
- Not rated by the issuing CNA
- CNA CVSS vector
- Not published by the issuing CNA
- Weaknesses
- CWE-476NULL Pointer DereferenceBase
- Data version
- 5.1
- Document digest
- e126647ee844a6f362e13fc051566b51bdf9a7c2618f983e0edbcccaa991cdf5
05 Affected products
06 References
- www.openwall.com[oss-security] 20181210 libvnc and tightvnc vulnerabilitieshttps://www.openwall.com/lists/oss-security/2018/12/10/5
- lists.debian.org[debian-lts-announce] 20191221 [SECURITY] [DLA 2045-1] tightvnc security updatehttps://lists.debian.org/debian-lts-announce/2019/12/msg00028.html
- usn.ubuntu.comUSN-4407-1https://usn.ubuntu.com/4407-1/
- cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/pdf/ssa-478893.pdf
- us-cert.cisa.govhttps://us-cert.cisa.gov/ics/advisories/icsa-20-343-08
07 Fixed in
Debian 12
- libvncserver No fix yet
- tightvnc Fixed in 1:1.3.9-9.1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- libvncserver No fix yet
- tightvnc Fixed in 1:1.3.9-9.1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- libvncserver No fix yet
- tightvnc Fixed in 1:1.3.9-9.1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 14.04 LTS
- x11vnc No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 16.04 LTS
- libvncserver Fixed in 0.9.10+dfsg-3ubuntu0.16.04.4
- ssvnc No fix yet
- tightvnc No fix yet
- vncsnapshot No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 18.04 LTS
- libvncserver Fixed in 0.9.11+dfsg-1ubuntu1.2
- ssvnc No fix yet
- tightvnc No fix yet
- vncsnapshot No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 20.04 LTS
- libvncserver Fixed in 0.9.12+dfsg-9ubuntu0.1
- ssvnc No fix yet
- tightvnc No fix yet
- veyon No fix yet
- vncsnapshot No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 22.04 LTS
- ssvnc No fix yet
- tightvnc No fix yet
- veyon No fix yet
- vncsnapshot No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 24.04 LTS
- ssvnc No fix yet
- tightvnc No fix yet
- veyon No fix yet
- vncsnapshot No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 25.10
- ssvnc No fix yet
- tightvnc No fix yet
- veyon No fix yet
- vncsnapshot No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 26.04 LTS
- ssvnc No fix yet
- tightvnc No fix yet
- veyon No fix yet
- vncsnapshot No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 26.10
- ssvnc No fix yet
- tightvnc No fix yet
- veyon No fix yet
- vncsnapshot No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 14.04 LTS
- tightvnc Fixed in 1.3.9-6.5+deb8u1build0.14.04.1~esm1Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.