CVE intelligence and bounded remediation

CVE-2023-25186 — An issue was discovered on NOKIA Airscale ASIKA Single RAN devices before 21B

Medium CVSS 5.1

An issue was discovered on NOKIA Airscale ASIKA Single RAN devices before 21B. If/when CSP (as a BTS administrator) removes security hardenings from a Nokia Single RAN BTS baseband unit, a directory path traversal in the Nokia BTS baseband unit diagnostic tool AaShell (which is by default disabled) provides access to the BTS baseband unit internal filesystem from the mobile network solution internal BTS management network.

Severity
Medium
CVSS
5.1 (3.1)
Published
2023-06-16
CISA KEV
Not currently listed
Ecosystem
operating-system
Weaknesses
CWE-22

Affected products

  • nokia / asika_airscale_firmware / 19b
  • nokia / asika_airscale_firmware / 20a
  • nokia / asika_airscale_firmware / 20b
  • nokia / asika_airscale_firmware / 20c
  • nokia / asika_airscale_firmware / 21a

Matched remediation archetype

Path traversal, unsafe upload, and file handling

This catalog composition supplies bounded fallback guidance. Explicitly reviewed curated workflows load with the complete record below.

Check exposure

  • Trace untrusted filenames, archive entries, URLs, and path segments into read, write, include, extraction, and upload operations.
  • Identify filesystem roots, mount permissions, symbolic-link behavior, archive handling, and whether uploaded content is web-accessible or executable.
  • Review canonicalization and containment checks across supported operating systems and storage backends.

Remediate safely

  • Generate server-side storage identifiers and resolve paths beneath a fixed root using filesystem-aware containment checks.
  • Reject absolute, parent-relative, alternate-separator, device, link, and archive entries that escape the intended root.
  • Store uploads outside executable or served paths, validate type and size, and use private atomic temporary files.

Authoritative sources

Complete CVE record and remediation plan

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