csaf_redhat - rhsa-2021

rhsa-2021_2758

Vulnerability from csaf_redhat

Published

2021-07-15 19:41

Modified

2024-11-05 23:46

Summary

Red Hat Security Advisory: nettle security update

Notes

Topic

An update for nettle is now available for Red Hat Enterprise Linux 7.4 Advanced Update Support, Red Hat Enterprise Linux 7.4 Telco Extended Update Support, and Red Hat Enterprise Linux 7.4 Update Services for SAP Solutions. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Details

Nettle is a cryptographic library that is designed to fit easily in almost any context: In crypto toolkits for object-oriented languages, such as C++, Python, or Pike, in applications like LSH or GNUPG, or even in kernel space. Security Fix(es): * nettle: Out of bounds memory access in signature verification (CVE-2021-20305) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.

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        "product_reference": "nettle-debuginfo-0:2.7.1-9.el7_4.x86_64",
        "relates_to_product_reference": "7Server-7.4.TUS"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "nettle-devel-0:2.7.1-9.el7_4.i686 as a component of Red Hat Enterprise Linux Server TUS (v. 7.4)",
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        "relates_to_product_reference": "7Server-7.4.TUS"
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  },
  "vulnerabilities": [
    {
      "acknowledgments": [
        {
          "names": [
            "Niels M\u00f6ller"
          ]
        }
      ],
      "cve": "CVE-2021-20305",
      "cwe": {
        "id": "CWE-787",
        "name": "Out-of-bounds Write"
      },
      "discovery_date": "2021-03-24T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "1942533"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in Nettle, where several Nettle signature verification functions (GOST DSA, EDDSA \u0026 ECDSA) result in the Elliptic Curve Cryptography point (ECC) multiply function being called with out-of-range scalers, possibly resulting in incorrect results. This flaw allows an attacker to force an invalid signature, causing an assertion failure or possible validation. The highest threat to this vulnerability is to confidentiality, integrity, as well as system availability.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "nettle: Out of bounds memory access in signature verification",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "* Although Red Hat OpenStack\u0027s dibbler package bundles nettle, it does not include the flawed functionality and is therefore unaffected.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
      "product_status": {
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          "summary": "Canonical URL",
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          "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-20305"
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          "category": "external",
          "summary": "https://lists.lysator.liu.se/pipermail/nettle-bugs/2021/009457.html",
          "url": "https://lists.lysator.liu.se/pipermail/nettle-bugs/2021/009457.html"
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      "release_date": "2021-03-16T00:00:00+00:00",
      "remediations": [
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          "date": "2021-07-15T19:41:47+00:00",
          "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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            "attackVector": "NETWORK",
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            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
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      "threats": [
        {
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        }
      ],
      "title": "nettle: Out of bounds memory access in signature verification"
    }
  ]
}

cve-2021-20305

Vulnerability from cvelistv5

Published

2021-04-05 21:31

Modified

2024-08-03 17:37

Severity ?

Summary

A flaw was found in Nettle in versions before 3.7.2, where several Nettle signature verification functions (GOST DSA, EDDSA & ECDSA) result in the Elliptic Curve Cryptography point (ECC) multiply function being called with out-of-range scalers, possibly resulting in incorrect results. This flaw allows an attacker to force an invalid signature, causing an assertion failure or possible validation. The highest threat to this vulnerability is to confidentiality, integrity, as well as system availability.

References

▼	URL	Tags
	https://bugzilla.redhat.com/show_bug.cgi?id=1942533	x_refsource_MISC
	https://security.gentoo.org/glsa/202105-31	vendor-advisory, x_refsource_GENTOO
	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MQKWVVMAIDAJ7YAA3VVO32BHLDOH2E63/	vendor-advisory, x_refsource_FEDORA
	https://www.debian.org/security/2021/dsa-4933	vendor-advisory, x_refsource_DEBIAN
	https://lists.debian.org/debian-lts-announce/2021/09/msg00008.html	mailing-list, x_refsource_MLIST
	https://security.netapp.com/advisory/ntap-20211022-0002/	x_refsource_CONFIRM

Impacted products

▼	Vendor	Product
	n/a	nettle

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
Confirmed: The vulnerability is confirmed from an analyst perspective.
Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
Patched: This vulnerability was successfully patched by the user reporting the sighting.
Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
Not confirmed: The user expresses doubt about the veracity of the vulnerability.
Not patched: This vulnerability was not successfully patched by the user reporting the sighting.

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