CVE-2018-25025: Actix web Out-of-bounds Write Vulnerability

CRITICAL
Advisory Identifier: GHSA-fgfm-hqjw-3265
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CVSS 9.8
CWE-787
Published
Advisory Summary

CVE-2018-25025 is a CRITICAL (CVSS 9.8) out-of-bounds write vulnerability (CWE-787: Out-of-bounds Write) affecting Actix web libraries in the crates.io ecosystem. The issue involves out-of-bounds write in actix-web. Remediation is available by upgrading affected packages to version 0.7.19.

CVE-2018-25025 at a Glance

CVE Identifier CVE-2018-25025
GHSA Identifier GHSA-fgfm-hqjw-3265
Severity CRITICAL
CVSS v3.1 Base Score 9.8
CWE Classification CWE-787: Out-of-bounds Write
Affected Product Actix web
Package Ecosystem crates.io
Published Date
Last Updated

Security Impact

CVSS: 9.8

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:H/I:H/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 High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix CVE-2018-25025

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

actix-web fixed: 0.7.19 
Upgrade actix-web to 0.7.19
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 actix-web

How to Check if You Are Affected

To determine whether your application is affected by CVE-2018-25025, inspect your project dependencies for Actix web:

inspect dependencies for actix-web

Analyze the terminal output to locate any version of Actix web in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.7.19), 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 Actix web, 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

An issue was discovered in the actix-web crate before 0.7.15 for Rust. It can unsoundly extend the lifetime of a string, leading to memory corruption.

CVE-2018-25025 Affected Actix web Versions

1 component(s)
Fixed Versions:
0.7.19
Product / Package Ecosystem Affected Versions Fixed Version
actix-web
 crates.io
< 0.7.19
0.7.19

References

NVD — CVE-2018-25025 NVD
https://nvd.nist.gov/vuln/detail/CVE-2018-25025
Actix web Source Repository REPOSITORY
https://github.com/actix/actix-web/issues/289
Actix web Source Repository REPOSITORY
https://github.com/actix/actix-web.git
raw.githubusercontent.com/rustsec/advisory-db... WEB
https://raw.githubusercontent.com/rustsec/advisory-db/main/crates/actix-web/RUSTSEC-2018-0019.md
rustsec.org/advisories/rustsec-... WEB
https://rustsec.org/advisories/RUSTSEC-2018-0019.html

Frequently Asked Questions

What is CVE-2018-25025?
CVE-2018-25025 is a security vulnerability in Actix web involving Out-of-bounds Write in actix-web under CWE-787: Out-of-bounds Write.
Which Actix web versions are affected?
Affected versions include releases prior to 0.7.19 across affected packages: actix-web.
What version fixes CVE-2018-25025?
Upgrading to 0.7.19 (or the latest patched release for your respective branch) resolves the vulnerability.
Is actix-web affected?
Yes, actix-web is affected in releases prior to 0.7.19. Upgrade your dependency to 0.7.19 or later.
What is the CVSS score of CVE-2018-25025?
CVE-2018-25025 has a CVSS v3.1 base score of 9.8 (CRITICAL) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2018-25025?
CVE-2018-25025 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-2018-25025?
Run the dependency tree command: 'inspect dependencies for actix-web'. 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-fgfm-hqjw-3265",
  "modified" : "2026-06-09T10:47:01Z",
  "published" : "2022-01-06T22:18:46Z",
  "aliases" : [ "CVE-2018-25025" ],
  "summary" : "Out-of-bounds Write in actix-web",
  "details" : "An issue was discovered in the actix-web crate before 0.7.15 for Rust. It can unsoundly extend the lifetime of a string, leading to memory corruption.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "crates.io",
      "name" : "actix-web"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.7.19"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2018-25025"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/actix/actix-web/issues/289"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/actix/actix-web.git"
  }, {
    "type" : "WEB",
    "url" : "https://raw.githubusercontent.com/rustsec/advisory-db/main/crates/actix-web/RUSTSEC-2018-0019.md"
  }, {
    "type" : "WEB",
    "url" : "https://rustsec.org/advisories/RUSTSEC-2018-0019.html"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-787" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-01-06T18:35:59Z",
    "nvd_published_at" : "2021-12-27T00:15:00Z"
  }
}