6.5 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
4.3 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:M/Au:N/C:N/I:P/A:N
0.003 Low
EPSS
Percentile
69.3%
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.
Author | Note |
---|---|
mdeslaur | nss in xenial is built with NSS_DISABLE_TLS_1_3, so this issue doesn’t affect it. |
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
ubuntu | 18.04 | noarch | firefox | < 72.0.1+build1-0ubuntu0.18.04.1 | UNKNOWN |
ubuntu | 19.04 | noarch | firefox | < 72.0.1+build1-0ubuntu0.19.04.1 | UNKNOWN |
ubuntu | 19.10 | noarch | firefox | < 72.0.1+build1-0ubuntu0.19.10.1 | UNKNOWN |
ubuntu | 20.04 | noarch | firefox | < 72.0.1+build1-0ubuntu1 | UNKNOWN |
ubuntu | 16.04 | noarch | firefox | < 72.0.1+build1-0ubuntu0.16.04.1 | UNKNOWN |
ubuntu | 18.04 | noarch | nss | < 2:3.35-2ubuntu2.8 | UNKNOWN |
ubuntu | 19.10 | noarch | nss | < 2:3.45-1ubuntu2.3 | UNKNOWN |
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-17023
launchpad.net/bugs/cve/CVE-2019-17023
nvd.nist.gov/vuln/detail/CVE-2019-17023
security-tracker.debian.org/tracker/CVE-2019-17023
ubuntu.com/security/notices/USN-4234-1
ubuntu.com/security/notices/USN-4397-1
www.mozilla.org/en-US/security/advisories/mfsa2020-01/#CVE-2019-17023
www.mozilla.org/security/advisories/mfsa2020-01/
6.5 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
4.3 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:M/Au:N/C:N/I:P/A:N
0.003 Low
EPSS
Percentile
69.3%