SB2024060201 - Input validation error in Misskey

Description

This security bulletin contains information about 1 vulnerability.

1) Input validation error (CVE-ID: CVE-2024-32983)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Amber

The vulnerability allows a remote attacker to impersonate remote accounts and perform spoofed activities.

The vulnerability exists due to improper input validation in incoming signed ActivityPub activity object processing when handling signed ActivityPub activities. A remote attacker can submit a specially crafted signed activity object to impersonate remote accounts and perform spoofed activities.

Exploitation requires access to a valid Linked Data Signature by the target account.

Remediation

Install update from vendor's website.

References

• https://github.com/misskey-dev/misskey/security/advisories/GHSA-2vxv-pv3m-3wvj
• https://github.com/advisories/GHSA-2vxv-pv3m-3wvj