CVE-2019-17023: canonical ubuntu_linux Improper Authentication
CVSS: 6.5v3.1MediumModified
AliasesALPINE-CVE-2019-17023UBUNTU-CVE-2019-17023DEBIAN-CVE-2019-17023
Published 08-01-2020Last modified 05-08-2024
Vulnerability summary
CVE-2019-17023 is a medium (CVSS 6.5) Improper Authentication vulnerability in canonical ubuntu_linux. EPSS estimates a 1.34% chance of exploitation in the next 30 days, higher than 70.8% of scored vulnerabilities.
CVSS score
6.5/10
010
Medium · v3.1 (NVD)EPSS score
1.34%
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 4Timeline
- 08-01-2020PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
After a HelloRetryRequest has been sent, the client may negotiate a lower protocol that TLS 1.3, resulting in an invalid state transition in the TLS State Machine. If the client gets into this state, incoming Application Data records will be ignored. This vulnerability affects Firefox < 72.
CVSS metrics
5 scores · 4 sources · 2 versionsMedium 6.5Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:NSourcesAll 4 agree
- OSV · AlpineEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
- OSV · UbuntuEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
- OSV · DebianEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Medium 4.3Preferred score · NVD (NIST)
AV:N/AC:M/Au:N/C:N/I:P/A:NSourcesSingle source
EPSS trend
Probability
1.34%
Chance of exploitation in the next 30 days
Percentile
71%
Versus all other CVEs
30-day change
0.00 pp
From 1.34% on 18-09-2026
18-09-202618-10-2026
EPSS score1.34%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Debian2 products
- nss< 2:3.49-1
- debian_linuxEOL10.0
Ubuntu2 products
- firefox< 72.0.1+build1-0ubuntu0.16.04.1 | < 72.0.1+build1-0ubuntu0.18.04.1 | < 72.0.1+build1-0ubuntu1
- nss< 2:3.35-2ubuntu2.8
Alpine1 product
- nss< 3.49-r0
Canonical1 product
- ubuntu_linuxEOL16.04 | 18.04 | 19.04 | 19.10 | 20.04
Mozilla1 product
- firefox< 72 | < 72.0
5 vendors · 7 products
