Publish GHSA-wrw7-89jp-8q8g

2026-05-22 18:04:22 -07:00 · 2024-12-23 20:22:10 +00:00
parent 10430572b8
commit b3a5f97dc6
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+{
+  "schema_version": "1.4.0",
+  "id": "GHSA-wrw7-89jp-8q8g",
+  "modified": "2024-12-23T20:19:24Z",
+  "published": "2024-12-23T20:19:24Z",
+  "aliases": [],
+  "summary": "Unsoundness in `Iterator` and `DoubleEndedIterator` impls for `glib::VariantStrIter`",
+  "details": "The `VariantStrIter::impl_get` function (called internally by implementations of the `Iterator` and `DoubleEndedIterator` traits for this type) was unsound, resulting in undefined behaviour.\n\nAn immutable reference `&p` to a `*mut libc::c_char` pointer initialized to `NULL` was passed as an argument to a C function that that mutates the pointer behind `&p` in-place (i.e. as an out-argument), which was unsound. After changes in recent versions of the Rust compiler, these unsound writes through `&p` now seem to be completely disregarded when building the `glib` crate with optimizations.\n\nThis subsequently caused all calls of `VariantStrIter::impl_get` to violate the safety requirements of the `std::ffi::CStr::from_ptr` function - which requires its argument to be a valid pointer to a C-style string - resulting in crashes due to `NULL` pointer dereferences.\n\nThis was fixed by passing the out-argument pointer explitly as `&mut p` instead of `&p`.\n\nThis issue has been present since this code was initially added in `glib` v0.15.0. The mismatch in mutability was likely missed (and not raised as an error by the compiler) because the C function wrapped by `VariantStrIter::impl_get` is variadic (`glib_sys::g_variant_get_child`), and the pointer in question is one of the variadic arguments.\n\n",
+  "severity": [
+    {
+      "type": "CVSS_V4",
+      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N"
+    }
+  ],
+  "affected": [
+    {
+      "package": {
+        "ecosystem": "crates.io",
+        "name": "glib"
+      },
+      "ranges": [
+        {
+          "type": "ECOSYSTEM",
+          "events": [
+            {
+              "introduced": "0.15.0"
+            },
+            {
+              "fixed": "0.20.0"
+            }
+          ]
+        }
+      ]
+    }
+  ],
+  "references": [
+    {
+      "type": "WEB",
+      "url": "https://github.com/gtk-rs/gtk-rs-core/pull/1343"
+    },
+    {
+      "type": "PACKAGE",
+      "url": "https://github.com/gtk-rs/gtk-rs-core"
+    },
+    {
+      "type": "WEB",
+      "url": "https://rustsec.org/advisories/RUSTSEC-2024-0429.html"
+    }
+  ],
+  "database_specific": {
+    "cwe_ids": [],
+    "severity": "MODERATE",
+    "github_reviewed": true,
+    "github_reviewed_at": "2024-12-23T20:19:24Z",
+    "nvd_published_at": null
+  }
+}