Publish Advisories

GHSA-56w4-5538-8v8h GHSA-vp6v-whfm-rv3g
2026-05-22 18:04:22 -07:00 · 2024-12-03 18:45:28 +00:00
parent 28c7211795
commit 6ab3553596
2 changed files with 126 additions and 0 deletions
@@ -0,0 +1,65 @@
+{
+  "schema_version": "1.4.0",
+  "id": "GHSA-56w4-5538-8v8h",
+  "modified": "2024-12-03T18:44:23Z",
+  "published": "2024-12-03T18:44:23Z",
+  "aliases": [
+    "CVE-2024-53867"
+  ],
+  "summary": "Synapse Matrix has a partial room state leak via Sliding Sync",
+  "details": "### Impact\nThe Sliding Sync feature on Synapse versions between 1.113.0rc1 and 1.120.0 can leak partial room state changes to users no longer in a room. Non-state events, like messages, are unaffected.\n\n### Patches\nSynapse version 1.120.1 fixes the problem.\n\n### Workarounds\nDisable Sliding Sync.\n\n### References\nhttps://github.com/matrix-org/matrix-spec-proposals/pull/4186\nhttps://github.com/element-hq/synapse/blob/d80cd57c54427687afcb48740d99219c88a0fff1/synapse/config/experimental.py#L341-L344\n\n### For more information\n\nIf you have any questions or comments about this advisory, please email us at [security at element.io](mailto:security@element.io).\n",
+  "severity": [
+    {
+      "type": "CVSS_V3",
+      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N"
+    }
+  ],
+  "affected": [
+    {
+      "package": {
+        "ecosystem": "PyPI",
+        "name": "matrix-synapse"
+      },
+      "ranges": [
+        {
+          "type": "ECOSYSTEM",
+          "events": [
+            {
+              "introduced": "1.113.0rc1"
+            },
+            {
+              "fixed": "1.120.1"
+            }
+          ]
+        }
+      ]
+    }
+  ],
+  "references": [
+    {
+      "type": "WEB",
+      "url": "https://github.com/element-hq/synapse/security/advisories/GHSA-56w4-5538-8v8h"
+    },
+    {
+      "type": "ADVISORY",
+      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-53867"
+    },
+    {
+      "type": "WEB",
+      "url": "https://github.com/matrix-org/matrix-spec-proposals/pull/4186"
+    },
+    {
+      "type": "PACKAGE",
+      "url": "https://github.com/element-hq/synapse"
+    }
+  ],
+  "database_specific": {
+    "cwe_ids": [
+      "CWE-497"
+    ],
+    "severity": "MODERATE",
+    "github_reviewed": true,
+    "github_reviewed_at": "2024-12-03T18:44:23Z",
+    "nvd_published_at": "2024-12-03T17:15:12Z"
+  }
+}
@@ -0,0 +1,61 @@
+{
+  "schema_version": "1.4.0",
+  "id": "GHSA-vp6v-whfm-rv3g",
+  "modified": "2024-12-03T18:44:00Z",
+  "published": "2024-12-03T18:44:00Z",
+  "aliases": [
+    "CVE-2024-53863"
+  ],
+  "summary": "Synapse can be forced to thumbnail unexpected file formats, invoking external, potentially untrustworthy decoders",
+  "details": "### Impact\n\nIn 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.\n\nThis 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 within the Matrix ecosystem.\n\nFor a list of image formats, as well as decoding libraries and helper programs used, see [the Pillow documentation](https://pillow.readthedocs.io/en/stable/handbook/image-file-formats.html).\n\n### Patches\n\nSynapse 1.120.1 addresses the issue by restricting thumbnail generation to images in the following widely used formats: PNG, JPEG, GIF, and WebP.\n\n### Workarounds\n\n- Ensure any image codecs and helper programs, such as Ghostscript, are patched against security vulnerabilities.\n- Uninstall unused image decoder libraries and helper programs, such as Ghostscript, from the system environment that Synapse is running in.\n    - Depending on the installation method, there may be some decoder libraries bundled with Pillow and these cannot be easily uninstalled.\n    - The official Docker container image does not include Ghostscript.\n\n### References\n\n- [The Pillow documentation](https://pillow.readthedocs.io/en/stable/handbook/image-file-formats.html) includes a list of supported image formats and which libraries or helper programs are used to decode them.\n\n### For more information\n\nIf you have any questions or comments about this advisory, please email us at [security at element.io](mailto:security@element.io).\n",
+  "severity": [
+    {
+      "type": "CVSS_V4",
+      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"
+    }
+  ],
+  "affected": [
+    {
+      "package": {
+        "ecosystem": "PyPI",
+        "name": "matrix-synapse"
+      },
+      "ranges": [
+        {
+          "type": "ECOSYSTEM",
+          "events": [
+            {
+              "introduced": "0"
+            },
+            {
+              "fixed": "1.120.1"
+            }
+          ]
+        }
+      ]
+    }
+  ],
+  "references": [
+    {
+      "type": "WEB",
+      "url": "https://github.com/element-hq/synapse/security/advisories/GHSA-vp6v-whfm-rv3g"
+    },
+    {
+      "type": "ADVISORY",
+      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-53863"
+    },
+    {
+      "type": "PACKAGE",
+      "url": "https://github.com/element-hq/synapse"
+    }
+  ],
+  "database_specific": {
+    "cwe_ids": [
+      "CWE-434"
+    ],
+    "severity": "HIGH",
+    "github_reviewed": true,
+    "github_reviewed_at": "2024-12-03T18:44:00Z",
+    "nvd_published_at": "2024-12-03T17:15:12Z"
+  }
+}