SB2026090758 - Integer overflow in Netatalk

Description

This security bulletin contains information about 1 vulnerability.

1) Integer overflow (CVE-ID: N/A)

CWE-ID: CWE-190 - Integer overflow

CVSSv4: 0 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]

The vulnerability allows a remote attacker to bypass AppleDouble entry-length validation.

The vulnerability exists due to integer overflow in parse_entries() in libatalk/adouble/ad_open.c when parsing crafted AppleDouble headers. A remote attacker can place a crafted file, macOS ._ AppleDouble sidecar, or org.netatalk.Metadata extended attribute on a shared volume that afpd later parses to bypass AppleDouble entry-length validation.

Audited consumers perform additional validation, and no confidentiality, integrity, or availability impact has been substantiated from this defect alone.

Remediation

Install update from vendor's website.

References

• https://github.com/Netatalk/netatalk/security/advisories/GHSA-mhfg-rppv-24g6
• https://github.com/Netatalk/netatalk/commit/767e231c8