Security readout for executives and security teams
Plain-English summary
Cisco ASA and FTD devices may have generated cryptographic keys with too little randomness. If an attacker can force many key generations and find a collision, they could impersonate a device or decrypt traffic protected by an affected key.
Executive priority
Handle as a moderate-priority cryptographic trust issue. It is not confirmed as actively exploited in the supplied sources, but compromised device keys could affect VPN, firewall identity, and encrypted traffic confidentiality.
Technical view
CVE-2019-1715 is a CWE-332 insufficient-entropy flaw in the DRBG/PRNG used by Cisco ASA and FTD Software when generating cryptographic keys. The CVSS 3.0 score is 5.3. The source bundle does not provide exact affected or fixed versions.
Likely exposure
Exposure is likely limited to organizations running Cisco ASA or Cisco FTD Software versions covered by Cisco's advisory. Risk centers on keys generated by affected devices, especially where those keys protect device identity or encrypted traffic.
Exploitation context
The CVE describes unauthenticated remote exploitation by causing many key generations and searching for cryptographic collisions. The bundle does not show CISA KEV listing or any cited evidence of active exploitation.
Researcher notes
The source bundle establishes the vulnerability class, affected product families, attack preconditions, and impact, but lacks exact version matrices and remediation details. Use Cisco's advisory as the authoritative source for applicability and fixes.
Mitigation direction
- Review Cisco's advisory for affected and fixed ASA/FTD releases.
- Upgrade or remediate according to Cisco's vendor guidance.
- Follow Cisco guidance for handling keys generated on affected devices.
- Prioritize internet-facing VPN, firewall, and remote-access deployments.
Validation and detection
- Inventory Cisco ASA and FTD deployments and software versions.
- Compare versions against Cisco's advisory applicability details.
- Identify certificates or private keys generated on potentially affected devices.
- Confirm remediation status and key-handling actions in change records.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-332: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2019-1715 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 5.3 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N3.91.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
5.3MediumVector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Source materials
- CVE List V5 sourceCVE List V5
- 20190501 Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Low-Entropy Keys VulnerabilityCVE reference · vendor-advisory, x_refsource_CISCO
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Insufficient Entropy in PRNG
Insufficient Entropy in PRNG represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.