CVE-2023-41378: Github.com/projectcalico/calico Denial of Service Vulnerability

HIGH
Advisory Identifier: GHSA-5r5h-q934-cccp
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CVSS 7.5
CWE-755 CWE-400
Published
Advisory Summary

CVE-2023-41378 is a HIGH (CVSS 7.5) denial of service vulnerability (CWE-755: Improper Handling of Exceptional Conditions) affecting Github.com/projectcalico/calico libraries in the Go ecosystem. The issue involves calico typha denial of service vulnerability. Remediation is available by upgrading affected packages to version 3.26.3.

CVE-2023-41378 at a Glance

CVE Identifier CVE-2023-41378
GHSA Identifier GHSA-5r5h-q934-cccp
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-755: Improper Handling of Exceptional Conditions
Affected Product Github.com/projectcalico/calico
Package Ecosystem Go
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-2023-41378

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

github.com/projectcalico/calico fixed: 3.26.3 
Upgrade github.com/projectcalico/calico to 3.26.3
github.com/projectcalico/calico fixed: Latest secure release 
Upgrade github.com/projectcalico/calico 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 github.com/projectcalico/calico

How to Check if You Are Affected

To determine whether your application is affected by CVE-2023-41378, inspect your project dependencies for Github.com/projectcalico/calico:

inspect dependencies for github.com/projectcalico/calico

Analyze the terminal output to locate any version of Github.com/projectcalico/calico in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 3.26.3), 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-755: Improper Handling of Exceptional Conditions, where the product does not handle or incorrectly handles an exceptional condition. In Github.com/projectcalico/calico, 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 certain conditions for Calico Typha (v3.26.2, v3.25.1 and below), and Calico Enterprise Typha (v3.17.1, v3.16.3, v3.15.3 and below), a client TLS handshake can block the Calico Typha server indefinitely, resulting in denial of service. The TLS Handshake() call is performed inside the main server handle for loop without any timeout allowing an unclean TLS handshake to block the main loop indefinitely while other connections will be idle waiting for that handshake to finish.

CVE-2023-41378 Affected Github.com/projectcalico/calico Versions

2 component(s)
Fixed Versions:
3.26.3
Product / Package Ecosystem Affected Versions Fixed Version
github.com/projectcalico/calico
golang/github.com/projectcalico/calico
Go
≥ 3.26.0
< 3.26.3
3.26.3
github.com/projectcalico/calico
golang/github.com/projectcalico/calico
Go
≤ 3.25.1

References

NVD — CVE-2023-41378 NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-41378
Github.com/projectcalico/calico Source Repository REPOSITORY
https://github.com/projectcalico/calico/pull/7908
Github.com/projectcalico/calico Source Repository REPOSITORY
https://github.com/projectcalico/calico/pull/7993
Security Fix Commit FIX COMMIT
https://github.com/projectcalico/calico/commit/2ebc1f92ecc39332cf1d55ba676d9101af24982f
Security Fix Commit FIX COMMIT
https://github.com/projectcalico/calico/commit/ad8bd001e650ec7742ac30e58247e7eef5956125
Github.com/projectcalico/calico Source Repository REPOSITORY
https://github.com/projectcalico/calico
Github.com/projectcalico/calico Security Information SECURITY
https://www.tigera.io/security-bulletins-tta-2023-001

Frequently Asked Questions

What is CVE-2023-41378?
CVE-2023-41378 is a security vulnerability in Github.com/projectcalico/calico involving Calico Typha denial of service vulnerability under CWE-755: Improper Handling of Exceptional Conditions.
Which Github.com/projectcalico/calico versions are affected?
Affected versions include releases prior to 3.26.3 across affected packages: github.com/projectcalico/calico.
What version fixes CVE-2023-41378?
Upgrading to 3.26.3 (or the latest patched release for your respective branch) resolves the vulnerability.
Is github.com/projectcalico/calico affected?
Yes, github.com/projectcalico/calico is affected in releases prior to 3.26.3, Latest secure release. Upgrade your dependency to 3.26.3, Latest secure release or later.
What is the CVSS score of CVE-2023-41378?
CVE-2023-41378 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-2023-41378?
CVE-2023-41378 is classified under CWE-755: Improper Handling of Exceptional Conditions (The product does not handle or incorrectly handles an exceptional condition.).
How can I check Go dependencies for CVE-2023-41378?
Run the dependency tree command: 'inspect dependencies for github.com/projectcalico/calico'. 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-5r5h-q934-cccp",
  "modified" : "2023-11-08T14:52:23Z",
  "published" : "2023-11-06T18:30:19Z",
  "aliases" : [ "CVE-2023-41378" ],
  "summary" : "Calico Typha denial of service vulnerability",
  "details" : "In certain conditions for Calico Typha (v3.26.2, v3.25.1 and below), and Calico Enterprise Typha (v3.17.1, v3.16.3, v3.15.3 and below), a client TLS handshake can block the Calico Typha server indefinitely, resulting in denial of service. The TLS Handshake() call is performed inside the main server handle for loop without any timeout allowing an unclean TLS handshake to block the main loop indefinitely while other connections will be idle waiting for that handshake to finish.\n",
  "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" : "Go",
      "name" : "github.com/projectcalico/calico"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "3.26.0"
      }, {
        "fixed" : "3.26.3"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/projectcalico/calico"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "3.25.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2023-41378"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/projectcalico/calico/pull/7908"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/projectcalico/calico/pull/7993"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/projectcalico/calico/commit/2ebc1f92ecc39332cf1d55ba676d9101af24982f"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/projectcalico/calico/commit/ad8bd001e650ec7742ac30e58247e7eef5956125"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/projectcalico/calico"
  }, {
    "type" : "WEB",
    "url" : "https://www.tigera.io/security-bulletins-tta-2023-001"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-400", "CWE-755" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-11-08T14:52:23Z",
    "nvd_published_at" : "2023-11-06T16:15:42Z"
  }
}