Security readout for executives and security teams
Plain-English summary
CVE-2024-3393 lets an unauthenticated attacker crash affected Palo Alto Networks PAN-OS firewalls when DNS Security is processing a specially crafted packet. A successful attack can reboot the firewall; repeated attacks can push it into maintenance mode, disrupting network protection and connectivity.
Executive priority
Treat this as urgent for affected Palo Alto firewalls because it can interrupt perimeter security and business connectivity, requires no authentication, and is in CISA KEV. Prioritize exposed production firewalls and high-availability pairs first.
Technical view
The issue is a PAN-OS data-plane denial-of-service flaw in the DNS Security feature. Network attack complexity is low, no credentials or user interaction are required, and the stated impact is high availability loss with possible maintenance-mode entry after repeated triggers. Cloud NGFW is listed as unaffected in the provided bundle.
Likely exposure
Exposure is most relevant to organizations running affected PAN-OS releases with DNS Security enabled on traffic paths where attacker-controlled packets can traverse the firewall data plane. The bundle lists PAN-OS 10.1, 10.2, 11.1, and 11.2 release lines among affected CPEs; exact status should be checked against the vendor advisory.
Exploitation context
CISA KEV status is true for this CVE, so treat it as known exploited. The provided sources do not include exploit mechanics, indicators, or a safe way to confirm attempted exploitation beyond operational symptoms such as unexpected firewall reboot or maintenance mode.
Researcher notes
Do not assume every PAN-OS deployment is vulnerable; exposure depends on affected release and DNS Security usage. The bundle confirms DoS behavior, CVSS 4.0 score 8.7, CWE-754, CISA KEV status, and Cloud NGFW unaffected status, but does not provide exploit indicators or exact fixed versions.
Mitigation direction
- Review Palo Alto Networks advisory for fixed PAN-OS releases and supported workarounds.
- Prioritize upgrades for internet-edge and high-availability firewalls using DNS Security.
- Confirm Cloud NGFW exposure separately; the bundle lists Cloud NGFW as unaffected.
- Monitor vendor and CISA guidance for changes to affected versions or mitigations.
- Avoid direct wrangler-style assumptions; follow Palo Alto operational upgrade guidance.
Validation and detection
- Inventory PAN-OS versions across all managed firewalls.
- Identify devices with DNS Security enabled on inspected traffic paths.
- Compare each device version against the Palo Alto advisory.
- Check firewall logs and uptime for unexpected reboots or maintenance-mode events.
- Confirm remediation by documenting upgraded versions and remaining exceptions.
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-754: 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-2024-3393 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
- High
- CVSS
- 8.7 (4.0)
- Known Exploited
- Yes
- Published
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/AU:N/R:U/V:C/RE:M/U:Amber
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.
CISA KEV status
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:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/AU:N/R:U/V:C/RE:M/U:Amber——Primary CVE scoreVulnerability scoring details
Base CVSS 4.0 score
8.7HighVector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/AU:N/R:U/V:C/RE:M/U:Amber
Source materials
- CVE List V5 sourceCVE List V5
- https://security.paloaltonetworks.com/CVE-2024-3393CVE reference · vendor-advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-3393CVE reference · government-resource
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.
Improper Check for Unusual or Exceptional Conditions
Improper Check for Unusual or Exceptional Conditions represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.