CVSS: 5.3EPSS: 0%CPEs: 1EXPL: 0CVE-2024-37303 – Synapse unauthenticated writes to the media repository allow planting of problematic content
https://notcve.org/view.php?id=CVE-2024-37303
03 Dec 2024 — Synapse is an open-source Matrix homeserver. Synapse before version 1.106 allows, by design, unauthenticated remote participants to trigger a download and caching of remote media from a remote homeserver to the local media repository. Such content then also becomes available for download from the local homeserver in an unauthenticated way. The implication is that unauthenticated remote adversaries can use this functionality to plant problematic content into the media repository. Synapse 1.106 introduces a p... • https://github.com/element-hq/synapse/security/advisories/GHSA-gjgr-7834-rhxr • CWE-306: Missing Authentication for Critical Function •
CVSS: 7.8EPSS: 0%CPEs: 1EXPL: 0CVE-2024-37302 – Synapse denial of service through media disk space consumption
https://notcve.org/view.php?id=CVE-2024-37302
03 Dec 2024 — Synapse is an open-source Matrix homeserver. Synapse versions before 1.106 are vulnerable to a disk fill attack, where an unauthenticated adversary can induce Synapse to download and cache large amounts of remote media. The default rate limit strategy is insufficient to mitigate this. This can lead to a denial of service, ranging from further media uploads/downloads failing to completely unavailability of the Synapse process, depending on how Synapse was deployed. Synapse 1.106 introduces a new "leaky bucke... • https://github.com/element-hq/synapse/security/advisories/GHSA-4mhg-xv73-xq2x • CWE-770: Allocation of Resources Without Limits or Throttling •
CVSS: 8.2EPSS: 0%CPEs: 1EXPL: 0CVE-2024-52805 – Synapse allows unsupported content types to lead to memory exhaustion
https://notcve.org/view.php?id=CVE-2024-52805
03 Dec 2024 — Synapse is an open-source Matrix homeserver. In Synapse before 1.120.1, multipart/form-data requests can in certain configurations transiently increase memory consumption beyond expected levels while processing the request, which can be used to amplify denial of service attacks. Synapse 1.120.1 resolves the issue by denying requests with unsupported multipart/form-data content type. • https://github.com/element-hq/synapse/security/advisories/GHSA-rfq8-j7rh-8hf2 • CWE-770: Allocation of Resources Without Limits or Throttling •
CVSS: 9.1EPSS: 0%CPEs: 1EXPL: 0CVE-2024-52815 – Synapse allows a a malformed invite to break the invitee's `/sync`
https://notcve.org/view.php?id=CVE-2024-52815
03 Dec 2024 — Synapse is an open-source Matrix homeserver. Synapse versions before 1.120.1 fail to properly validate invites received over federation. This vulnerability allows a malicious server to send a specially crafted invite that disrupts the invited user's /sync functionality. Synapse 1.120.1 rejects such invalid invites received over federation and restores the ability to sync for affected users. • https://github.com/element-hq/synapse/security/advisories/GHSA-f3r3-h2mq-hx2h • CWE-20: Improper Input Validation •
CVSS: 8.2EPSS: 0%CPEs: 1EXPL: 0CVE-2024-53863 – Synapse can be forced to thumbnail unexpected file formats, invoking external, potentially untrustworthy decoders
https://notcve.org/view.php?id=CVE-2024-53863
03 Dec 2024 — Synapse is an open-source Matrix homeserver. In Synapse versions before 1.120.1, enabling the dynamic_thumbnails option or processing a specially crafted request could trigger the decoding and thumbnail generation of uncommon image formats, potentially invoking external tools like Ghostscript for processing. This significantly expands the attack surface in a historically vulnerable area, presenting a risk that far outweighs the benefit, particularly since these formats are rarely used on the open web or wit... • https://github.com/element-hq/synapse/security/advisories/GHSA-vp6v-whfm-rv3g • CWE-434: Unrestricted Upload of File with Dangerous Type •
CVSS: 6.8EPSS: 0%CPEs: 1EXPL: 0CVE-2024-31208 – Synapse's V2 state resolution weakness allows DoS from remote room members
https://notcve.org/view.php?id=CVE-2024-31208
23 Apr 2024 — Synapse is an open-source Matrix homeserver. A remote Matrix user with malicious intent, sharing a room with Synapse instances before 1.105.1, can dispatch specially crafted events to exploit a weakness in the V2 state resolution algorithm. This can induce high CPU consumption and accumulate excessive data in the database of such instances, resulting in a denial of service. Servers in private federations, or those that do not federate, are not affected. Server administrators should upgrade to 1.105.1 or lat... • https://github.com/element-hq/synapse/commit/55b0aa847a61774b6a3acdc4b177a20dc019f01a • CWE-770: Allocation of Resources Without Limits or Throttling •
CVSS: 5.3EPSS: 0%CPEs: 3EXPL: 0CVE-2023-43796 – Synapse vulnerable to leak of remote user device information
https://notcve.org/view.php?id=CVE-2023-43796
31 Oct 2023 — Synapse is an open-source Matrix homeserver Prior to versions 1.95.1 and 1.96.0rc1, cached device information of remote users can be queried from Synapse. This can be used to enumerate the remote users known to a homeserver. System administrators are encouraged to upgrade to Synapse 1.95.1 or 1.96.0rc1 to receive a patch. As a workaround, the `federation_domain_whitelist` can be used to limit federation traffic with a homeserver. Synapse es un servidor doméstico Matrix de código abierto. • https://github.com/matrix-org/synapse/commit/daec55e1fe120c564240c5386e77941372bf458f • CWE-200: Exposure of Sensitive Information to an Unauthorized Actor •
CVSS: 6.1EPSS: 0%CPEs: 3EXPL: 0CVE-2023-45129 – matrix-synapse vulnerable to denial of service due to malicious server ACL events
https://notcve.org/view.php?id=CVE-2023-45129
10 Oct 2023 — Synapse is an open-source Matrix homeserver written and maintained by the Matrix.org Foundation. Prior to version 1.94.0, a malicious server ACL event can impact performance temporarily or permanently leading to a persistent denial of service. Homeservers running on a closed federation (which presumably do not need to use server ACLs) are not affected. Server administrators are advised to upgrade to Synapse 1.94.0 or later. As a workaround, rooms with malicious server ACL events can be purged and blocked us... • https://github.com/matrix-org/synapse/pull/16360 • CWE-770: Allocation of Resources Without Limits or Throttling •
CVSS: 3.7EPSS: 0%CPEs: 3EXPL: 0CVE-2023-41335 – Temporary storage of plaintext passwords during password changes in matrix synapse
https://notcve.org/view.php?id=CVE-2023-41335
26 Sep 2023 — Synapse is an open-source Matrix homeserver written and maintained by the Matrix.org Foundation. When users update their passwords, the new credentials may be briefly held in the server database. While this doesn't grant the server any added capabilities—it already learns the users' passwords as part of the authentication process—it does disrupt the expectation that passwords won't be stored in the database. As a result, these passwords could inadvertently be captured in database backups for a longer durati... • https://github.com/matrix-org/synapse/pull/16272 • CWE-312: Cleartext Storage of Sensitive Information •
CVSS: 4.3EPSS: 0%CPEs: 3EXPL: 0CVE-2023-42453 – Improper validation of receipts allows forged read receipts in matrix synapse
https://notcve.org/view.php?id=CVE-2023-42453
26 Sep 2023 — Synapse is an open-source Matrix homeserver written and maintained by the Matrix.org Foundation. Users were able to forge read receipts for any event (if they knew the room ID and event ID). Note that the users were not able to view the events, but simply mark it as read. This could be confusing as clients will show the event as read by the user, even if they are not in the room. This issue has been patched in version 1.93.0. • https://github.com/matrix-org/synapse/pull/16327 • CWE-285: Improper Authorization •