Vulnerability-Lookup

CVE-2020-24659 (GCVE-0-2020-24659)

Vulnerability from cvelistv5 – Published: 2020-09-04 14:03 – Updated: 2024-08-04 15:19

Summary

An issue was discovered in GnuTLS before 3.6.15. A server can trigger a NULL pointer dereference in a TLS 1.3 client if a no_renegotiation alert is sent with unexpected timing, and then an invalid second handshake occurs. The crash happens in the application's error handling path, where the gnutls_deinit function is called after detecting a handshake failure.

Severity

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE

Assigner

mitre mitre root

References

9 references

URL	Tags
https://gitlab.com/gnutls/gnutls/-/issues/1071	x_refsource_MISC
https://www.gnutls.org/security-new.html#GNUTLS-S…	x_refsource_MISC
https://security.gentoo.org/glsa/202009-01	vendor-advisoryx_refsource_GENTOO
https://security.netapp.com/advisory/ntap-2020091…	x_refsource_CONFIRM
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
https://usn.ubuntu.com/4491-1/	vendor-advisoryx_refsource_UBUNTU
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
http://lists.opensuse.org/opensuse-security-annou…	vendor-advisoryx_refsource_SUSE
http://lists.opensuse.org/opensuse-security-annou…	vendor-advisoryx_refsource_SUSE

Show details on NVD website

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}

OPENSUSE-SU-2020:1743-1

Vulnerability from csaf_opensuse - Published: 2020-10-26 09:22 - Updated: 2020-10-26 09:22

Summary

Security update for gnutls

Severity

Moderate

Scope

1 vulnerability in this advisory, including CVE-2020-24659.

CVE-2020-24659

5.9 (Medium)


                
                  CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Recommended: 21 products

Open the full advisory

RHSA-2020:5483

Vulnerability from csaf_redhat - Published: 2020-12-15 17:24 - Updated: 2026-06-25 10:57

Summary

Red Hat Security Advisory: gnutls security and bug fix update

Severity

Moderate

Scope

1 vulnerability in this advisory, including CVE-2020-24659.

CVE-2020-24659

A flaw was found in GnuTLS, where the server can trigger the client to run into heap buffer overflow if a no_renegotiation alert is sent in an unexpected timing. This flaw allows the client to crash at the session deinitialization timing. The highest threat from this vulnerability is to system availability.

7.5 (High)


                
                  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Fixed: 75 products

https://access.redhat.com/errata/RHSA-2020:5483

Open the full advisory

SSA-398330

Vulnerability from csaf_siemens - Published: 2023-12-12 00:00 - Updated: 2025-08-12 00:00

Summary

SSA-398330: Vulnerabilities in the additional GNU/Linux subsystem of the SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP >= V3.1.0 and < V3.1.5

Scope

544 vulnerabilities in this advisory, including CVE-2020-24659.

CVE-2020-24659

7.5 (High)


                
                  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C

Known affected: 5 products

https://support.industry.siemens.com/cs/ww/en/view/109478459/

Open the full advisory

SUSE-SU-2020:2864-1

Vulnerability from csaf_suse - Published: 2020-10-06 08:34 - Updated: 2020-10-06 08:34

Summary

Security update for gnutls

Severity

Moderate

Scope

1 vulnerability in this advisory, including CVE-2020-24659.

CVE-2020-24659

5.9 (Medium)


                
                  CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Recommended: 26 products

Open the full advisory

SUSE-SU-2020:2864-2

Vulnerability from csaf_suse - Published: 2022-07-14 15:14 - Updated: 2022-07-14 15:14

Summary

Security update for gnutls

Severity

Moderate

Scope

1 vulnerability in this advisory, including CVE-2020-24659.

CVE-2020-24659

5.9 (Medium)


                
                  CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Recommended: 27 products

Open the full advisory

SUSE-SU-2020:2988-1

Vulnerability from csaf_suse - Published: 2020-10-21 15:35 - Updated: 2020-10-21 15:35

Summary

Security update for gnutls

Severity

Moderate

Scope

1 vulnerability in this advisory, including CVE-2020-24659.

CVE-2020-24659

5.9 (Medium)


                
                  CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Recommended: 94 products

Open the full advisory

UBUNTU-CVE-2020-24659 (CVE-2020-24659)

Vulnerability from osv_ubuntu – Published: 2020-09-04 15:15 – Updated: 2026-04-22 07:39 – Source website

Details

Severity

7.5 (High)


                    
                      CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2020-24659	REPORT
	https://www.gnutls.org/security-new.html#GNUTLS-S…	REPORT
	https://security.gentoo.org/glsa/202009-01	REPORT
	https://ubuntu.com/security/notices/USN-4491-1	ADVISORY
	https://www.cve.org/CVERecord?id=CVE-2020-24659	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "gnutls-bin",
            "binary_version": "3.6.13-2ubuntu1.3"
          },
          {
            "binary_name": "guile-gnutls",
            "binary_version": "3.6.13-2ubuntu1.3"
          },
          {
            "binary_name": "libgnutls-dane0",
            "binary_version": "3.6.13-2ubuntu1.3"
          },
          {
            "binary_name": "libgnutls-openssl27",
            "binary_version": "3.6.13-2ubuntu1.3"
          },
          {
            "binary_name": "libgnutls30",
            "binary_version": "3.6.13-2ubuntu1.3"
          },
          {
            "binary_name": "libgnutlsxx28",
            "binary_version": "3.6.13-2ubuntu1.3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "gnutls28",
        "purl": "pkg:deb/ubuntu/gnutls28@3.6.13-2ubuntu1.3?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.6.13-2ubuntu1.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.6.9-5ubuntu1",
        "3.6.9-5ubuntu2",
        "3.6.10-5",
        "3.6.11.1-2",
        "3.6.11.1-2ubuntu2",
        "3.6.13-2ubuntu1",
        "3.6.13-2ubuntu1.1",
        "3.6.13-2ubuntu1.2"
      ]
    }
  ],
  "aliases": [],
  "details": "An issue was discovered in GnuTLS before 3.6.15. A server can trigger a NULL pointer dereference in a TLS 1.3 client if a no_renegotiation alert is sent with unexpected timing, and then an invalid second handshake occurs. The crash happens in the application\u0027s error handling path, where the gnutls_deinit function is called after detecting a handshake failure.",
  "id": "UBUNTU-CVE-2020-24659",
  "modified": "2026-04-22T07:39:31Z",
  "published": "2020-09-04T15:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2020-24659"
    },
    {
      "type": "REPORT",
      "url": "https://www.gnutls.org/security-new.html#GNUTLS-SA-2020-09-04"
    },
    {
      "type": "REPORT",
      "url": "https://security.gentoo.org/glsa/202009-01"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-4491-1"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2020-24659"
    }
  ],
  "related": [
    "USN-4491-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2020-24659"
  ]
}

VDE-2022-010

Vulnerability from csaf_phoenixcontactgmbhcokg - Published: 2022-04-12 06:00 - Updated: 2025-05-22 13:03

Summary

PHOENIX CONTACT: Multiple Linux component vulnerabilities fixed in latest AXC F x152 LTS release

Scope

60 vulnerabilities in this advisory, including CVE-2020-24659.

CVE-2020-24659

7.5 (High)


                
                  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Known affected: 4 products Fixed: 4 products

Open the full advisory

WID-SEC-W-2025-0227

Vulnerability from csaf_certbund - Published: 2021-11-30 23:00 - Updated: 2025-01-30 23:00

Summary

IBM QRadar SIEM: Mehrere Schwachstellen

Severity

Hoch

Scope

105 vulnerabilities in this advisory, including CVE-2020-24659.

CVE-2020-24659

In IBM QRadar SIEM existieren mehrere Schwachstellen. Die Schwachstellen bestehen in verschiedenen Komponenten. Ein entfernter, anonymer oder authentisierter oder lokaler Angreifer kann diese Schwachstellen ausnutzen, um seine Privilegien zu erweitern, Administratorrechte zu erlangen, beliebigen Programmcode auszuführen, Informationen offenzulegen, Dateien zu manipulieren oder Sicherheitsvorkehrungen zu umgehen.

Known affected: 3 products

Open the full advisory

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

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CVE-2020-24659 (GCVE-0-2020-24659)

UBUNTU-CVE-2020-24659 (CVE-2020-24659)

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Related by attack behaviour