CVE-2019-15550: Simd json Out Of Bounds Read Vulnerability

HIGH
Advisory Identifier: GHSA-gwfj-pw2x-h6c2
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CVSS 7.5
CWE-125
Published
Advisory Summary

CVE-2019-15550 is a HIGH (CVSS 7.5) out of bounds read vulnerability (CWE-125: Out-of-bounds Read) affecting Simd json libraries in the crates.io ecosystem. The issue involves out of bounds read in simd-json. Remediation is available by upgrading affected packages to version 0.1.15.

CVE-2019-15550 at a Glance

CVE Identifier CVE-2019-15550
GHSA Identifier GHSA-gwfj-pw2x-h6c2
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-125: Out-of-bounds Read
Affected Product Simd json
Package Ecosystem crates.io
Published Date
Last Updated

Security Impact

CVSS: 7.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity None (I:N)
Availability High (A:H)

How to Fix CVE-2019-15550

To remediate this vulnerability, upgrade all affected Simd json dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

simd-json fixed: 0.1.15 
Upgrade simd-json to 0.1.15
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for simd-json

How to Check if You Are Affected

To determine whether your application is affected by CVE-2019-15550, inspect your project dependencies for Simd json:

inspect dependencies for simd-json

Analyze the terminal output to locate any version of Simd json in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.1.15), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-125: Out-of-bounds Read, where the product reads data past the end, or before the beginning, of the intended buffer. In Simd json, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

The affected version of this crate did not guard against accessing memory beyond the range of its input data. A pointer cast to read the data into a 256-bit register could lead to a segmentation fault when the end plus the 32 bytes (256 bit) read would overlap into the next page during string parsing. This allows an attacker to eventually crash a service. The flaw was corrected by using a padding buffer for the last read from the input. So that we are we never read over the boundary of the input data.

CVE-2019-15550 Affected Simd json Versions

1 component(s)
Fixed Versions:
0.1.15
Product / Package Ecosystem Affected Versions Fixed Version
simd-json
 crates.io
≥ 0.1.13
< 0.1.15
0.1.15

References

NVD — CVE-2019-15550 NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-15550
Simd json Source Repository REPOSITORY
https://github.com/Licenser/simdjson-rs/pull/27
Simd json Source Repository REPOSITORY
https://github.com/Licenser/simdjson-rs
rustsec.org/advisories/rustsec-... WEB
https://rustsec.org/advisories/RUSTSEC-2019-0008.html

Frequently Asked Questions

What is CVE-2019-15550?
CVE-2019-15550 is a security vulnerability in Simd json involving Out of bounds read in simd-json under CWE-125: Out-of-bounds Read.
Which Simd json versions are affected?
Affected versions include releases prior to 0.1.15 across affected packages: simd-json.
What version fixes CVE-2019-15550?
Upgrading to 0.1.15 (or the latest patched release for your respective branch) resolves the vulnerability.
Is simd-json affected?
Yes, simd-json is affected in releases prior to 0.1.15. Upgrade your dependency to 0.1.15 or later.
What is the CVSS score of CVE-2019-15550?
CVE-2019-15550 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2019-15550?
CVE-2019-15550 is classified under CWE-125: Out-of-bounds Read (The product reads data past the end, or before the beginning, of the intended buffer.).
How can I check crates.io dependencies for CVE-2019-15550?
Run the dependency tree command: 'inspect dependencies for simd-json'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-gwfj-pw2x-h6c2",
  "modified" : "2023-06-13T21:01:35Z",
  "published" : "2021-08-25T20:43:56Z",
  "aliases" : [ "CVE-2019-15550" ],
  "summary" : "Out of bounds read in simd-json",
  "details" : "The affected version of this crate did not guard against accessing memory beyond the range of its input data. A pointer cast to read the data into a 256-bit register could lead to a segmentation fault when the end plus the 32 bytes (256 bit) read would overlap into the next page during string parsing. This allows an attacker to eventually crash a service. The flaw was corrected by using a padding buffer for the last read from the input. So that we are we never read over the boundary of the input data.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "crates.io",
      "name" : "simd-json"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0.1.13"
      }, {
        "fixed" : "0.1.15"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2019-15550"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/Licenser/simdjson-rs/pull/27"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/Licenser/simdjson-rs"
  }, {
    "type" : "WEB",
    "url" : "https://rustsec.org/advisories/RUSTSEC-2019-0008.html"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-125" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2021-08-19T21:23:48Z",
    "nvd_published_at" : null
  }
}