rustsec-2020-0123
Vulnerability from osv_rustsec
Published
2020-01-24 12:00
Modified
2023-06-13 13:10
Summary
Contents of uninitialized memory exposed in DeflateOutput's AsyncRead implementation
Details

Affected versions of this crate passes an uninitialized buffer to a user-provided trait function AsyncRead::poll_read().

Arbitrary AsyncRead::poll_read() implementations can read from the uninitialized buffer (memory exposure) and also can return incorrect number of bytes written to the buffer. Reading from uninitialized memory produces undefined values that can quickly invoke undefined behavior.

The flaw was fixed in commit 5ba266a by ensuring the newly allocated part of the buffer is zero-initialized before passing it to a user-provided AsyncRead::poll_read().

To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "categories": [
          "memory-exposure"
        ],
        "cvss": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
        "informational": null
      },
      "ecosystem_specific": {
        "affected_functions": null,
        "affects": {
          "arch": [],
          "functions": [],
          "os": []
        }
      },
      "package": {
        "ecosystem": "crates.io",
        "name": "libp2p-deflate",
        "purl": "pkg:cargo/libp2p-deflate"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.0.0-0"
            },
            {
              "fixed": "0.27.1"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "versions": []
    }
  ],
  "aliases": [
    "CVE-2020-36443",
    "GHSA-gvcp-948f-8f2p"
  ],
  "database_specific": {
    "license": "CC0-1.0"
  },
  "details": "Affected versions of this crate passes an uninitialized buffer to a user-provided trait function `AsyncRead::poll_read()`.\n\nArbitrary `AsyncRead::poll_read()` implementations can read from the uninitialized buffer (memory exposure) and also can return incorrect number of bytes written to the buffer.\nReading from uninitialized memory produces undefined values that can quickly invoke undefined behavior.\n\nThe flaw was fixed in commit 5ba266a by ensuring the newly allocated part of the buffer is zero-initialized before passing it to a user-provided `AsyncRead::poll_read()`.",
  "id": "RUSTSEC-2020-0123",
  "modified": "2023-06-13T13:10:24Z",
  "published": "2020-01-24T12:00:00Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://crates.io/crates/libp2p-deflate"
    },
    {
      "type": "ADVISORY",
      "url": "https://rustsec.org/advisories/RUSTSEC-2020-0123.html"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/libp2p/rust-libp2p/issues/1932"
    }
  ],
  "related": [],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Contents of uninitialized memory exposed in DeflateOutput\u0027s AsyncRead implementation"
}


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