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Origin of Sync Messages is unchecked

High
rubdos published GHSA-r58q-66g9-h6g8 Feb 13, 2025

Package

cargo libsignal-service (Rust)

Affected versions

e76fa1a06

Patched versions

82d70f6720e762898f34ae76b0894b0297d9b2f8

Description

Impact

All users of libsignal-service-rs. Any contact may forge a sync message, impersonating another device of the local user. The origin of sync messages is not checked.

Patches

Patched libsignal-service can be found after commit 82d70f6. The Metadata struct contains an additional was_encrypted field, which breaks the API, but should be easily resolvable.

Workarounds

n.a.

References

n.a.

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Changed
Confidentiality
Low
Integrity
High
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:N

CVE ID

CVE-2025-24903

Weaknesses

No CWEs

Credits