Advisory Details

October 4th, 2023

A10 Thunder ADC ShowTechDownloadView Directory Traversal Information Disclosure Vulnerability

ZDI-23-1495
ZDI-CAN-17899

CVE ID CVE-2023-42129
CVSS SCORE 6.5, AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
AFFECTED VENDORS A10
AFFECTED PRODUCTS Thunder ADC
VULNERABILITY DETAILS

This vulnerability allows remote attackers to disclose sensitive information on affected installations of A10 Thunder ADC. Authentication is required to exploit this vulnerability.

The specific flaw exists within the ShowTechDownloadView class. The issue results from the lack of proper validation of a user-supplied path prior to using it in file operations. An attacker can leverage this vulnerability to disclose information in the context of the service account.

ADDITIONAL DETAILS A10 has issued an update to correct this vulnerability. More details can be found at:
https://support.a10networks.com/support/security_advisory/a10-acos-file-access-vulnerability/
DISCLOSURE TIMELINE
  • 2022-09-20 - Vulnerability reported to vendor
  • 2023-10-04 - Coordinated public release of advisory
CREDIT Piotr Bazydlo (@chudypb) of Trend Micro Zero Day Initiative
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