{"id":"CVE-2025-24903","aliases":["EUVD-2025-3984","GHSA-r58q-66g9-h6g8"],"status":"published","title":"libsignal-service-rs Doesn't Check Origin of Sync Messages","description":"libsignal-service-rs is a Rust version of the libsignal-service-java library which implements the core functionality to communicate with Signal servers. Prior to commit 82d70f6720e762898f34ae76b0894b0297d9b2f8, any contact may forge a sync message, impersonating another device of the local user. The origin of sync messages is not checked. Patched libsignal-service can be found after commit 82d70f6720e762898f34ae76b0894b0297d9b2f8. The `Metadata` struct contains an additional `was_encrypted` field, which breaks the API, but should be easily resolvable. No known workarounds are available.","severity":{"version":"3.1","score":8.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00186,"percentile":0.08208,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-345"],"published":"2025-02-13T15:20:28Z","modified":"2026-10-28T02:30:29Z","products":[{"vendor":"whisperfish","product":"libsignal-service-rs"}],"references":[{"url":"https://github.com/whisperfish/libsignal-service-rs/security/advisories/GHSA-r58q-66g9-h6g8","tags":["x_refsource_CONFIRM","advisory"]},{"url":"https://github.com/whisperfish/libsignal-service-rs/commit/82d70f6720e762898f34ae76b0894b0297d9b2f8","tags":["x_refsource_MISC","fix"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/24xxx/CVE-2025-24903.json","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-24903","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2025-24903","title":"libsignal-service-rs Doesn't Check Origin of Sync Messages","description":"libsignal-service-rs is a Rust version of the libsignal-service-java library which implements the core functionality to communicate with Signal servers. Prior to commit 82d70f6720e762898f34ae76b0894b0297d9b2f8, any contact may forge a sync message, impersonating another device of the local user. The origin of sync messages is not checked. Patched libsignal-service can be found after commit 82d70f6720e762898f34ae76b0894b0297d9b2f8. The `Metadata` struct contains an additional `was_encrypted` field, which breaks the API, but should be easily resolvable. No known workarounds are available.","status":"published","published":"2025-02-13T15:20:28.251Z","modified":"2025-02-13T16:27:04.294Z","cvss":[{"version":"3.1","score":8.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:N","level":"high","assessor":"cna"}],"cwes":["CWE-345"],"updated_at":"2026-11-02T14:32:44.11109Z"}],"euvd":[{"id":"EUVD-2025-3984","description":"libsignal-service-rs is a Rust version of the libsignal-service-java library which implements the core functionality to communicate with Signal servers. Prior to commit 82d70f6720e762898f34ae76b0894b0297d9b2f8, any contact may forge a sync message, impersonating another device of the local user. The origin of sync messages is not checked. Patched libsignal-service can be found after commit 82d70f6720e762898f34ae76b0894b0297d9b2f8. The `Metadata` struct contains an additional `was_encrypted` field, which breaks the API, but should be easily resolvable. No known workarounds are available.","status":"published","published":"2025-02-13T15:20:28Z","modified":"2025-02-13T16:27:04Z","cvss":[{"version":"3.1","score":8.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:N","level":"high"}],"updated_at":"2026-11-03T00:03:53.290549Z"}],"nvd":[{"id":"CVE-2025-24903","description":"libsignal-service-rs is a Rust version of the libsignal-service-java library which implements the core functionality to communicate with Signal servers. Prior to commit 82d70f6720e762898f34ae76b0894b0297d9b2f8, any contact may forge a sync message, impersonating another device of the local user. The origin of sync messages is not checked. Patched libsignal-service can be found after commit 82d70f6720e762898f34ae76b0894b0297d9b2f8. The `Metadata` struct contains an additional `was_encrypted` field, which breaks the API, but should be easily resolvable. No known workarounds are available.","status":"published","published":"2025-02-13T16:16:48.913Z","modified":"2026-06-17T08:59:49.06Z","cvss":[{"version":"3.1","score":8.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:N","level":"high","assessor":"secondary"}],"cwes":["CWE-345"],"updated_at":"2026-11-02T14:10:51.445921Z"}],"osv":[{"id":"CVE-2025-24903","title":"libsignal-service-rs Doesn't Check Origin of Sync Messages","description":"libsignal-service-rs is a Rust version of the libsignal-service-java library which implements the core functionality to communicate with Signal servers. Prior to commit 82d70f6720e762898f34ae76b0894b0297d9b2f8, any contact may forge a sync message, impersonating another device of the local user. The origin of sync messages is not checked. Patched libsignal-service can be found after commit 82d70f6720e762898f34ae76b0894b0297d9b2f8. The `Metadata` struct contains an additional `was_encrypted` field, which breaks the API, but should be easily resolvable. No known workarounds are available.","status":"published","published":"2025-02-13T15:20:28.251Z","modified":"2026-10-28T02:30:29.091772135Z","cvss":[{"version":"3.1","score":8.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:N","level":"high"}],"cwes":["CWE-345"],"updated_at":"2026-11-02T15:44:47.386092Z"}]}}