CVE-2019-25001: Serde cbor Out Of Bounds Write Vulnerability

HIGH
Advisory Identifier: GHSA-xr7r-88qv-q7hm
Share
CVSS 7.5
CWE-787
Published
Advisory Summary

CVE-2019-25001 is a HIGH (CVSS 7.5) out of bounds write vulnerability (CWE-787: Out-of-bounds Write) affecting Serde cbor libraries in the crates.io ecosystem. The issue involves out of bounds write in serde_cbor. Remediation is available by upgrading affected packages to version 0.10.2.

CVE-2019-25001 at a Glance

CVE Identifier CVE-2019-25001
GHSA Identifier GHSA-xr7r-88qv-q7hm
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-787: Out-of-bounds Write
Affected Product Serde cbor
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-2019-25001

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

serde_cbor fixed: 0.10.2 
Upgrade serde_cbor to 0.10.2
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 serde_cbor

How to Check if You Are Affected

To determine whether your application is affected by CVE-2019-25001, inspect your project dependencies for Serde cbor:

inspect dependencies for serde_cbor

Analyze the terminal output to locate any version of Serde cbor in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.10.2), 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-787: Out-of-bounds Write, where the product writes data past the end, or before the beginning, of the intended buffer. In Serde cbor, 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

Affected versions of this crate did not properly check if semantic tags were nested excessively during deserialization. This allows an attacker to craft small (< 1 kB) CBOR documents that cause a stack overflow. The flaw was corrected by limiting the allowed number of nested tags.

CVE-2019-25001 Affected Serde cbor Versions

1 component(s)
Fixed Versions:
0.10.2
Product / Package Ecosystem Affected Versions Fixed Version
serde_cbor
 crates.io
< 0.10.2
0.10.2

References

NVD — CVE-2019-25001 NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-25001
Serde cbor Source Repository REPOSITORY
https://github.com/pyfisch/cbor/pull/153
Security Fix Commit FIX COMMIT
https://github.com/pyfisch/cbor/commit/1aec4f9d71855dbfb223fa61ca60260400cc5d5f
Serde cbor Source Repository REPOSITORY
https://github.com/pyfisch/cbor
Serde cbor Release RELEASE
https://github.com/pyfisch/cbor/releases/tag/v0.10.2
rustsec.org/advisories/rustsec-... WEB
https://rustsec.org/advisories/RUSTSEC-2019-0025.html

Frequently Asked Questions

What is CVE-2019-25001?
CVE-2019-25001 is a security vulnerability in Serde cbor involving Out of bounds write in serde_cbor under CWE-787: Out-of-bounds Write.
Which Serde cbor versions are affected?
Affected versions include releases prior to 0.10.2 across affected packages: serde_cbor.
What version fixes CVE-2019-25001?
Upgrading to 0.10.2 (or the latest patched release for your respective branch) resolves the vulnerability.
Is serde_cbor affected?
Yes, serde_cbor is affected in releases prior to 0.10.2. Upgrade your dependency to 0.10.2 or later.
What is the CVSS score of CVE-2019-25001?
CVE-2019-25001 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-2019-25001?
CVE-2019-25001 is classified under CWE-787: Out-of-bounds Write (The product writes data past the end, or before the beginning, of the intended buffer.).
How can I check crates.io dependencies for CVE-2019-25001?
Run the dependency tree command: 'inspect dependencies for serde_cbor'. 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-xr7r-88qv-q7hm",
  "modified" : "2023-06-13T21:04:01Z",
  "published" : "2021-08-25T20:45:51Z",
  "aliases" : [ "CVE-2019-25001" ],
  "summary" : "Out of bounds write in serde_cbor",
  "details" : "Affected versions of this crate did not properly check if semantic tags were nested excessively during deserialization. This allows an attacker to craft small (< 1 kB) CBOR documents that cause a stack overflow. The flaw was corrected by limiting the allowed number of nested tags.",
  "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" : "serde_cbor"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.10.2"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2019-25001"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/pyfisch/cbor/pull/153"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/pyfisch/cbor/commit/1aec4f9d71855dbfb223fa61ca60260400cc5d5f"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/pyfisch/cbor"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/pyfisch/cbor/releases/tag/v0.10.2"
  }, {
    "type" : "WEB",
    "url" : "https://rustsec.org/advisories/RUSTSEC-2019-0025.html"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-787" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2021-08-19T21:20:43Z",
    "nvd_published_at" : null
  }
}