CVE-2023-45312: Mtproto proxy Remote Code Execution Vulnerability

HIGH
Advisory Identifier: GHSA-738q-mc72-2q22
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CVSS 8.8
CWE-94 CWE-1188
Published
Advisory Summary

CVE-2023-45312 is a HIGH (CVSS 8.8) remote code execution vulnerability (CWE-94: Improper Control of Generation of Code ('Code Injection')) affecting Mtproto proxy libraries in the Hex ecosystem. The issue involves mtproto proxy remote code execution vulnerability. Remediation is available in the latest vendor maintenance releases.

CVE-2023-45312 at a Glance

CVE Identifier CVE-2023-45312
GHSA Identifier GHSA-738q-mc72-2q22
Severity HIGH
CVSS v3.1 Base Score 8.8
CWE Classification CWE-94: Improper Control of Generation of Code ('Code Injection')
Affected Product Mtproto proxy
Package Ecosystem Hex
Published Date
Last Updated

Security Impact

CVSS: 8.8

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

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
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-2023-45312

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

mtproto_proxy fixed: Latest secure release 
Upgrade mtproto_proxy to Latest secure release
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 mtproto_proxy

How to Check if You Are Affected

To determine whether your application is affected by CVE-2023-45312, inspect your project dependencies for Mtproto proxy:

inspect dependencies for mtproto_proxy

Analyze the terminal output to locate any version of Mtproto proxy in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), 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-94: Improper Control of Generation of Code ('Code Injection'), where the product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. In Mtproto proxy, 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

In the mtproto_proxy (aka MTProto proxy) component through 0.7.2 for Erlang, a low-privileged remote attacker can access an improperly secured default installation without authenticating and achieve remote command execution ability.

CVE-2023-45312 Affected Mtproto proxy Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
mtproto_proxy
 Hex
≤ 0.7.2

References

NVD — CVE-2023-45312 NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-45312
Mtproto proxy Source Repository REPOSITORY
https://github.com/seriyps/mtproto_proxy
medium.com/@_sadshade/almost-2... WEB
https://medium.com/@_sadshade/almost-2000-telegram-proxy-servers-are-potentially-vulnerable-to-rce-since-2018-742a455be16b

Frequently Asked Questions

What is CVE-2023-45312?
CVE-2023-45312 is a security vulnerability in Mtproto proxy involving MTProto proxy remote code execution vulnerability under CWE-94: Improper Control of Generation of Code ('Code Injection').
Which Mtproto proxy versions are affected?
Affected versions include releases prior to current release patches across affected packages: mtproto_proxy.
What version fixes CVE-2023-45312?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is mtproto_proxy affected?
Yes, mtproto_proxy is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What is the CVSS score of CVE-2023-45312?
CVE-2023-45312 has a CVSS v3.1 base score of 8.8 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2023-45312?
CVE-2023-45312 is classified under CWE-94: Improper Control of Generation of Code ('Code Injection') (The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.).
How can I check Hex dependencies for CVE-2023-45312?
Run the dependency tree command: 'inspect dependencies for mtproto_proxy'. 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-738q-mc72-2q22",
  "modified" : "2023-10-18T16:20:10Z",
  "published" : "2023-10-10T21:31:12Z",
  "aliases" : [ "CVE-2023-45312" ],
  "summary" : "MTProto proxy remote code execution vulnerability",
  "details" : "In the mtproto_proxy (aka MTProto proxy) component through 0.7.2 for Erlang, a low-privileged remote attacker can access an improperly secured default installation without authenticating and achieve remote command execution ability.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Hex",
      "name" : "mtproto_proxy"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "0.7.2"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2023-45312"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/seriyps/mtproto_proxy"
  }, {
    "type" : "WEB",
    "url" : "https://medium.com/@_sadshade/almost-2000-telegram-proxy-servers-are-potentially-vulnerable-to-rce-since-2018-742a455be16b"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-1188", "CWE-94" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-10-10T22:28:03Z",
    "nvd_published_at" : "2023-10-10T21:15:09Z"
  }
}