CVE-2020-14403: canonical ubuntu_linux Out-of-bounds Write
CVSS: 5.5v2.0MediumModified
AliasesUBUNTU-CVE-2020-14403DEBIAN-CVE-2020-14403
Published 17-06-2020Last modified 04-08-2024
Vulnerability summary
CVE-2020-14403 is a medium (CVSS 5.5) Out-of-bounds Write vulnerability in canonical ubuntu_linux. EPSS estimates a 1.61% chance of exploitation in the next 30 days, higher than 75.5% of scored vulnerabilities.
CVSS score
5.5/10
010
Medium · v2.0 (NVD)EPSS score
1.61%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 7 · Related 3Timeline
- 17-06-2020PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
An issue was discovered in LibVNCServer before 0.9.13. libvncserver/hextile.c allows out-of-bounds access via encodings.
CVSS metrics
4 scores · 3 sources · 2 versionsMedium 5.4Preferred score · OSV · Ubuntu (Ecosystem advisory) · calculated from vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:LSourcesAll 3 agree
- OSV · DebianEcosystem advisory · calculated5.4MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L
- NVDNIST5.4MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L
Medium 5.5Preferred score · NVD (NIST)
AV:N/AC:L/Au:S/C:P/I:N/A:PSourcesSingle source
EPSS trend
Probability
1.61%
Chance of exploitation in the next 30 days
Percentile
76%
Versus all other CVEs
30-day change
0.00 pp
From 1.61% on 18-09-2026
18-09-202618-10-2026
EPSS score1.61%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Siemens6 products
- simatic_itc1500_firmware≥ 3.0.0.0, < 3.2.1.0
- simatic_itc1500_pro_firmware≥ 3.0.0.0, < 3.2.1.0
- simatic_itc1900_firmware≥ 3.0.0.0, < 3.2.1.0
- simatic_itc1900_pro_firmware≥ 3.0.0.0, < 3.2.1.0
- simatic_itc2200_firmware≥ 3.0.0.0, < 3.2.1.0
Ubuntu4 products
- libvncserver< 0.9.10+dfsg-3ubuntu0.16.04.5 | < 0.9.11+dfsg-1ubuntu1.3 | < 0.9.12+dfsg-9ubuntu0.2
- veyonAll versions (No fix recorded)
- vino< 3.8.1-0ubuntu9.3 | < 3.22.0-3ubuntu1.1 | < 3.22.0-5ubuntu2.1
- x11vncAll versions (No fix recorded)
Debian2 products
- libvncserver< 0.9.13+dfsg-1
- debian_linuxEOL8.0 | 9.0
Canonical1 product
- ubuntu_linuxEOL14.04 | 16.04 | 18.04 | 18.10 | 20.04
Libvnc_project1 product
- libvncserver≤ 0.9.12
5 vendors · 14 products
References
12 links- github.com/LibVNC/libvncserver/compare/LibVNCServer-0.9.12...LibVNCServer-0.9.13X Refsource MISCREPORTRelease NotesThird Party Advisory
- github.com/LibVNC/libvncserver/commit/74e8a70f2c9a5248d6718ce443e07c7ed314dfffX Refsource MISCPatchThird Party Advisory
lists.debian.org/debian-lts-announce/2020/06/msg00035.htmlMailing ListX Refsource MLISTThird Party Advisory- lists.debian.org/debian-lts-announce/2020/08/msg00045.htmlMailing ListX Refsource MLISTThird Party Advisory