Full Report
An exhaustive evaluation of three firewall models from Palo Alto Networks has uncovered a host of known security flaws impacting the devices' firmware as well as misconfigured security features. "These weren't obscure, corner-case vulnerabilities," security vendor Eclypsium said in a report shared with The Hacker News. "Instead these were very well-known issues that we wouldn't expect to see
Analysis Summary
# Vulnerability: PANdora's Box - Multiple Firmware and Secure Boot Bypass Flaws in Palo Alto Firewalls
## CVE Details
This summary aggregates multiple vulnerabilities under the umbrella term "PANdora's Box." Specific CVEs mentioned are:
- CVE ID: CVE-2020-10713 (BootHole)
- CVE ID: CVE-2022-24030, CVE-2021-33627, CVE-2021-42060, CVE-2021-42554, CVE-2021-43323, and CVE-2021-45970 (SMM Vulnerabilities)
- CVE ID: LogoFAIL (Multiple, specific IDs not provided in text)
- CVE ID: PixieFail (Multiple, specific IDs not provided in text)
- CVSS Score: Not explicitly provided for the collective finding, but individual exploited flaws suggest **High severity** due to Secure Boot bypass potential.
- CWE: Includes buffer overflow, privilege escalation flaws, and UEFI component vulnerabilities.
## Affected Systems
- Products: Palo Alto Networks Firewalls (PA-3260, PA-1410, PA-415)
- Versions:
- PA-3260: All versions (Note: This model has reached End-of-Sale as of August 31, 2023, but is still listed as affected).
- PA-1410: Affected by PixieFail.
- PA-415: Affected by PixieFail.
- Configurations: Devices utilizing vulnerable firmware components enabling Secure Boot, UEFI, or GRUB2 bootloader features.
## Vulnerability Description
Security vendor Eclypsium discovered several well-known vulnerabilities impacting the firmware and basic integrity protections (like Secure Boot) on several Palo Alto Networks firewall models. These issues could allow attackers to bypass fundamental security controls and modify the device firmware. Specific classes of flaws include:
1. **CVE-2020-10713 (BootHole):** A buffer overflow impacting the GRUB2 bootloader, enabling Secure Boot bypass.
2. **SMM Vulnerabilities (CVE-2022-24030, etc.):** Flaws in Insyde Software's InsydeH2O UEFI firmware leading to privilege escalation and Secure Boot bypass (Affects PA-3260).
3. **LogoFAIL:** Critical vulnerabilities in UEFI components exploiting image parsing libraries to bypass Secure Boot and execute malicious code at startup (Affects PA-3260).
4. **PixieFail:** Vulnerabilities in the TCP/IP network protocol stack incorporated in the UEFI reference implementation, leading to code execution and information disclosure (Affects PA-1410 and PA-415).
5. **Insecure flash access control vulnerability** (Partial description provided).
## Exploitation
- Status: The report implies these vulnerabilities represent *known* flaws integrated into the devices, suggesting a high potential for exploitation if not patched, but does not explicitly state whether these specific PAN implementations are *currently* exploited in the wild as part of the "PANdora's Box" finding.
- Complexity: Likely **Medium to High**, requiring initial access or physical access depending on the specific flaw leveraged (e.g., firmware modification usually requires elevated privileges or physical access, though remote UEFI flaws simplify this).
- Attack Vector: Varies by component, potentially **Network** (e.g., PixieFail related networking stack issues) or requiring **Local/Physical** access for direct firmware manipulation.
## Impact
The primary impact revolves around compromising the integrity of the device before the operating system loads.
- Confidentiality: **High** (If firmware is modified, all subsequent protections and data flows can be compromised).
- Integrity: **Critical** (Ability to bypass Secure Boot and modify firmware).
- Availability: **High** (Compromised firmware can render the appliance unusable or unstable).
## Remediation
### Patches
The specific patches required for the collected vulnerabilities (BootHole, LogoFAIL, PixieFail, SMM flaws) depend on the base firmware version supplied by Palo Alto Networks. Security researchers must consult Palo Alto Networks' official security advisories for the specific patches corresponding to their affected firewall models (PA-3260, PA-1410, PA-415).
### Workarounds
No specific workarounds were detailed in the provided text snippet, but generally, for firmware integrity bypasses:
1. Ensure physical security hardening (access control to devices).
2. If applicable, verify that Secure Boot configurations are correctly enforced through the BIOS/UEFI settings, though the vulnerabilities specifically target the bypass of these controls.
## Detection
- Indicators of compromise: Unanticipated changes to boot configuration or firmware binaries. Abnormal behavior during system startup/reboot cycles.
- Detection methods and tools: Use hardware-assisted integrity monitoring tools capable of vetting the firmware supply chain and verifying the UEFI/BIOS environment post-boot. Analyzing the device boot chain integrity is crucial.
## References
- Vendor Advisories: Reference the vendor security advisories related to CVE-2020-10713, LogoFAIL, and PixieFail as applied to Palo Alto Networks products.
- Relevant links:
- Eclypsium report: hXXps://eclypsium.com/blog/pandoras-box-vulns-in-security-appliances/