Vulnerability-Lookup

OESA-2021-1109 (CVE-2021-20231)

Vulnerability from osv_openeuler – Published: 2021-04-07 11:04 – Updated: 2026-08-06 11:04 – Source website

Summary

gnutls security update

Details

GnuTLS is a secure communications library implementing the SSL, TLS and DTLS protocols and technologies around them. It provides a simple C language application programming interface (API) to access the secure communications protocols as well as APIs to parse and write X.509, PKCS #12, and other required structures. The project strives to provide a secure communications back-end, simple to use and integrated with the rest of the base Linux libraries. A back-end designed to work and be secure out of the box, keeping the complexity of TLS and PKI out of application code.

Security Fix(es):

A flaw was found in gnutls. A use after free issue in client sending key_share extension may lead to memory corruption and other consequences.(CVE-2021-20231)

A flaw was found in gnutls. A use after free issue in client_send_params in lib/ext/pre_shared_key.c may lead to memory corruption and other potential consequences.(CVE-2021-20232)

Severity

9.8 (Critical)


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

References

URL

Type

	https://openeuler.org/en/security/safety-bulletin…	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2021-20231	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2021-20232	ADVISORY

JSON

To clipboard

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  "affected": [
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      "ecosystem_specific": {
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  "database_specific": {
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  },
  "details": "GnuTLS is a secure communications library implementing the SSL, TLS and DTLS protocols and technologies around them. It provides a simple C language application programming interface (API) to access the secure communications protocols as well as APIs to parse and write X.509, PKCS #12, and other required structures. The project strives to provide a secure communications back-end, simple to use and integrated with the rest of the base Linux libraries. A back-end designed to work and be secure out of the box, keeping the complexity of TLS and PKI out of application code.\r\n\r\nSecurity Fix(es):\r\n\r\nA flaw was found in gnutls. A use after free issue in client sending key_share extension may lead to memory corruption and other consequences.(CVE-2021-20231)\r\n\r\nA flaw was found in gnutls. A use after free issue in client_send_params in lib/ext/pre_shared_key.c may lead to memory corruption and other potential consequences.(CVE-2021-20232)",
  "id": "OESA-2021-1109",
  "modified": "2026-08-06T11:04:20Z",
  "published": "2021-04-07T11:04:20Z",
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  ],
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  "upstream": [
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    "CVE-2021-20232"
  ]
}

CVE-2021-20231 (GCVE-0-2021-20231)

Vulnerability from cvelistv5 – Published: 2021-03-12 18:23 – Updated: 2024-08-03 17:30

Summary

A flaw was found in gnutls. A use after free issue in client sending key_share extension may lead to memory corruption and other consequences.

Severity

No CVSS data available.

CWE

CWE-416

Assigner

redhat redhat root

References

12 references

URL	Tags
https://bugzilla.redhat.com/show_bug.cgi?id=1922276	x_refsource_MISC
https://www.gnutls.org/security-new.html#GNUTLS-S…	x_refsource_MISC
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
https://lists.apache.org/thread.html/r5f88bed4477…	mailing-listx_refsource_MLIST
https://security.netapp.com/advisory/ntap-2021041…	x_refsource_CONFIRM
https://lists.apache.org/thread.html/rcd70a4c88a4…	mailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/r5d4001031e7…	mailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/r9cbc69e5727…	mailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/rfd5273d72d2…	mailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/rf5e1256d870…	mailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/r50661d6f008…	mailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/r6ac143ba6dd…	mailing-listx_refsource_MLIST

Impacted products

1 product

Vendor	Product	Version
n/a	gnutls	Affected: gnutls 3.7.1

Show details on NVD website

JSON

To clipboard

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CVE-2021-20232 (GCVE-0-2021-20232)

Vulnerability from cvelistv5 – Published: 2021-03-12 18:25 – Updated: 2025-12-03 15:03

Summary

A flaw was found in gnutls. A use after free issue in client_send_params in lib/ext/pre_shared_key.c may lead to memory corruption and other potential consequences.

Severity

9.8 (Critical)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-12-03 15:03 UTC

CWE

CWE-416

Assigner

redhat redhat root

References

12 references

URL	Tags
https://www.gnutls.org/security-new.html#GNUTLS-S…	x_refsource_MISC
https://bugzilla.redhat.com/show_bug.cgi?id=1922275	x_refsource_MISC
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
https://lists.apache.org/thread.html/r5f88bed4477…	mailing-listx_refsource_MLIST
https://security.netapp.com/advisory/ntap-2021041…	x_refsource_CONFIRM
https://lists.apache.org/thread.html/rcd70a4c88a4…	mailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/r5d4001031e7…	mailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/r9cbc69e5727…	mailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/rfd5273d72d2…	mailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/rf5e1256d870…	mailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/r50661d6f008…	mailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/r6ac143ba6dd…	mailing-listx_refsource_MLIST

Impacted products

1 product

Vendor	Product	Version
n/a	gnutls	Affected: gnutls 3.7.1

Show details on NVD website

JSON

To clipboard

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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.

Action not permitted

OESA-2021-1109 (CVE-2021-20231)

CVE-2021-20231 (GCVE-0-2021-20231)

CVE-2021-20232 (GCVE-0-2021-20232)

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Related by attack behaviour