CVE-2019-17023
nss: TLS 1.3 HelloRetryRequest downgrade request sets client into invalid state
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
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.
Después de que HelloRetryRequest haya sido enviado, el cliente puede negociar un protocolo inferior que TLS versión 1.3, resultando en una transición de estado no válida en TLS State Machine. Si el cliente entra en este estado, los registros de Datos de Aplicación entrantes serian ignorados. Esta vulnerabilidad afecta a Firefox versiones anteriores a la versión 72.
A protocol downgrade flaw was found in Network Security Services (NSS). After a HelloRetryRequest has been sent, the client may negotiate a lower protocol than 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.
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CVSS Scores
SSVC
- Decision:-
Timeline
- 2019-09-30 CVE Reserved
- 2020-01-08 CVE Published
- 2024-08-05 CVE Updated
- 2025-03-30 EPSS Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-287: Improper Authentication
CAPEC
References (6)
URL | Tag | Source |
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URL | Date | SRC |
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URL | Date | SRC |
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URL | Date | SRC |
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https://usn.ubuntu.com/4234-1 | 2023-01-27 | |
https://usn.ubuntu.com/4397-1 | 2023-01-27 | |
https://www.debian.org/security/2020/dsa-4726 | 2023-01-27 | |
https://www.mozilla.org/security/advisories/mfsa2020-01 | 2023-01-27 | |
https://access.redhat.com/security/cve/CVE-2019-17023 | 2021-03-22 | |
https://bugzilla.redhat.com/show_bug.cgi?id=1791225 | 2021-03-22 |
Affected Vendors, Products, and Versions
Vendor | Product | Version | Other | Status | ||||||
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Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
Mozilla Search vendor "Mozilla" | Firefox Search vendor "Mozilla" for product "Firefox" | < 72.0 Search vendor "Mozilla" for product "Firefox" and version " < 72.0" | - |
Affected
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Canonical Search vendor "Canonical" | Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux" | 16.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "16.04" | lts |
Affected
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Canonical Search vendor "Canonical" | Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux" | 18.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "18.04" | lts |
Affected
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Canonical Search vendor "Canonical" | Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux" | 19.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "19.04" | - |
Affected
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Canonical Search vendor "Canonical" | Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux" | 19.10 Search vendor "Canonical" for product "Ubuntu Linux" and version "19.10" | - |
Affected
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Canonical Search vendor "Canonical" | Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux" | 20.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "20.04" | lts |
Affected
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Debian Search vendor "Debian" | Debian Linux Search vendor "Debian" for product "Debian Linux" | 10.0 Search vendor "Debian" for product "Debian Linux" and version "10.0" | - |
Affected
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