Publish GHSA-jj6p-3m75-g2p3

Author: advisory-database[bot]

advisories/github-reviewed/2025/12/GHSA-jj6p-3m75-g2p3/GHSA-jj6p-3m75-g2p3.json

@@ -0,0 +1,69 @@
+{
+  "schema_version": "1.4.0",
+  "id": "GHSA-jj6p-3m75-g2p3",
+  "modified": "2025-12-08T22:07:47Z",
+  "published": "2025-12-08T22:07:47Z",
+  "aliases": [
+    "CVE-2025-66622"
+  ],
+  "summary": " matrix-sdk-base denial of service via custom m.room.join_rules event values",
+  "details": "The matrix-sdk-base crate is unable to handle responses that include custom m.room.join_rules values due to a serialization bug.\n\nThis can be exploited to cause a denial-of-service condition, if a user is invited to a room with non-standard join rules, the crate's sync process will stall, preventing further processing for all rooms.\n\n### Patches\nThe issue is fixed in matrix-sdk-base 0.16.0.\n\n### Workarounds\n\nUsers can leave affected rooms on another client to mitigate the issue.\n\n### References\n\nThe issue was fixed in https://github.com/matrix-org/matrix-rust-sdk/pull/5924.",
+  "severity": [
+    {
+      "type": "CVSS_V4",
+      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U"
+    }
+  ],
+  "affected": [
+    {
+      "package": {
+        "ecosystem": "crates.io",
+        "name": "matrix-sdk-base"
+      },
+      "ranges": [
+        {
+          "type": "ECOSYSTEM",
+          "events": [
+            {
+              "introduced": "0"
+            },
+            {
+              "fixed": "0.16.0"
+            }
+          ]
+        }
+      ]
+    }
+  ],
+  "references": [
+    {
+      "type": "WEB",
+      "url": "https://github.com/matrix-org/matrix-rust-sdk/security/advisories/GHSA-jj6p-3m75-g2p3"
+    },
+    {
+      "type": "WEB",
+      "url": "https://github.com/matrix-org/matrix-rust-sdk/pull/5924"
+    },
+    {
+      "type": "WEB",
+      "url": "https://github.com/matrix-org/matrix-rust-sdk/commit/4ea0418abefab2aa93f8851a4d39c723e703e6b0"
+    },
+    {
+      "type": "PACKAGE",
+      "url": "https://github.com/matrix-org/matrix-rust-sdk"
+    },
+    {
+      "type": "WEB",
+      "url": "https://rustsec.org/advisories/RUSTSEC-2025-0135.html"
+    }
+  ],
+  "database_specific": {
+    "cwe_ids": [
+      "CWE-755"
+    ],
+    "severity": "LOW",
+    "github_reviewed": true,
+    "github_reviewed_at": "2025-12-08T22:07:47Z",
+    "nvd_published_at": null
+  }
+}