csaf_redhat - rhsa-2021

rhsa-2021_4954

Vulnerability from csaf_redhat

Published

2021-12-06 19:33

Modified

2024-11-15 10:41

Summary

Red Hat Security Advisory: thunderbird security update

Notes

Topic

An update for thunderbird is now available for Red Hat Enterprise Linux 8.2 Extended Update Support. Red Hat Product Security has rated this update as having a security impact of Critical. 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

Mozilla Thunderbird is a standalone mail and newsgroup client. Security Fix(es): * nss: Memory corruption in decodeECorDsaSignature with DSA signatures (and RSA-PSS) (CVE-2021-43527) 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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  "vulnerabilities": [
    {
      "acknowledgments": [
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          "names": [
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          "organization": "Project Zero"
        },
        {
          "names": [
            "the Mozilla project"
          ],
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        }
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      "cve": "CVE-2021-43527",
      "cwe": {
        "id": "CWE-120",
        "name": "Buffer Copy without Checking Size of Input (\u0027Classic Buffer Overflow\u0027)"
      },
      "discovery_date": "2021-11-17T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2024370"
        }
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      "notes": [
        {
          "category": "description",
          "text": "A remote code execution flaw was found in the way NSS verifies certificates. This flaw allows an attacker posing as an SSL/TLS server to trigger this issue in a client application compiled with NSS when it tries to initiate an SSL/TLS connection.  Similarly, a server application compiled with NSS, which processes client certificates, can receive a malicious certificate via a client, triggering the flaw. The highest threat to this vulnerability is confidentiality, integrity, as well as system availability.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "nss: Memory corruption in decodeECorDsaSignature with DSA signatures (and RSA-PSS)",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "The issue is not limited to TLS. Any applications that use NSS certificate verification are vulnerable; S/MIME is impacted as well.  Similarly, a server application compiled with NSS, which processes client certificates, can receive a malicious certificate via a client.\n\nFirefox is not vulnerable to this flaw as it uses the mozilla::pkix for certificate verification. Thunderbird is affected when parsing email with the S/MIME signature.  Thunderbird on Red Hat Enterprise Linux 8.4 and later does not need to be updated since it uses the system NSS library, but earlier Red Hat Enterprise Linux 8 extended life streams will need to update Thunderbird as well as NSS.",
          "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"
        }
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          "summary": "https://www.cve.org/CVERecord?id=CVE-2021-43527",
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          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2021-43527",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-43527"
        },
        {
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          "summary": "https://googleprojectzero.blogspot.com/2021/12/this-shouldnt-have-happened.html",
          "url": "https://googleprojectzero.blogspot.com/2021/12/this-shouldnt-have-happened.html"
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          "summary": "https://www.mozilla.org/en-US/security/advisories/mfsa2021-51/",
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          "date": "2021-12-06T19:33:44+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\n\nAll running instances of Thunderbird must be restarted for the update to take effect.",
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            "AppStream-8.2.0.Z.EUS:thunderbird-debugsource-0:91.3.0-3.el8_2.x86_64"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2021:4954"
        },
        {
          "category": "workaround",
          "details": "Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.",
          "product_ids": [
            "AppStream-8.2.0.Z.EUS:thunderbird-0:91.3.0-3.el8_2.aarch64",
            "AppStream-8.2.0.Z.EUS:thunderbird-0:91.3.0-3.el8_2.ppc64le",
            "AppStream-8.2.0.Z.EUS:thunderbird-0:91.3.0-3.el8_2.src",
            "AppStream-8.2.0.Z.EUS:thunderbird-0:91.3.0-3.el8_2.x86_64",
            "AppStream-8.2.0.Z.EUS:thunderbird-debuginfo-0:91.3.0-3.el8_2.aarch64",
            "AppStream-8.2.0.Z.EUS:thunderbird-debuginfo-0:91.3.0-3.el8_2.ppc64le",
            "AppStream-8.2.0.Z.EUS:thunderbird-debuginfo-0:91.3.0-3.el8_2.x86_64",
            "AppStream-8.2.0.Z.EUS:thunderbird-debugsource-0:91.3.0-3.el8_2.aarch64",
            "AppStream-8.2.0.Z.EUS:thunderbird-debugsource-0:91.3.0-3.el8_2.ppc64le",
            "AppStream-8.2.0.Z.EUS:thunderbird-debugsource-0:91.3.0-3.el8_2.x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "products": [
            "AppStream-8.2.0.Z.EUS:thunderbird-0:91.3.0-3.el8_2.aarch64",
            "AppStream-8.2.0.Z.EUS:thunderbird-0:91.3.0-3.el8_2.ppc64le",
            "AppStream-8.2.0.Z.EUS:thunderbird-0:91.3.0-3.el8_2.src",
            "AppStream-8.2.0.Z.EUS:thunderbird-0:91.3.0-3.el8_2.x86_64",
            "AppStream-8.2.0.Z.EUS:thunderbird-debuginfo-0:91.3.0-3.el8_2.aarch64",
            "AppStream-8.2.0.Z.EUS:thunderbird-debuginfo-0:91.3.0-3.el8_2.ppc64le",
            "AppStream-8.2.0.Z.EUS:thunderbird-debuginfo-0:91.3.0-3.el8_2.x86_64",
            "AppStream-8.2.0.Z.EUS:thunderbird-debugsource-0:91.3.0-3.el8_2.aarch64",
            "AppStream-8.2.0.Z.EUS:thunderbird-debugsource-0:91.3.0-3.el8_2.ppc64le",
            "AppStream-8.2.0.Z.EUS:thunderbird-debugsource-0:91.3.0-3.el8_2.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Critical"
        }
      ],
      "title": "nss: Memory corruption in decodeECorDsaSignature with DSA signatures (and RSA-PSS)"
    }
  ]
}

cve-2021-43527

Vulnerability from cvelistv5

Published

2021-12-08 00:00

Modified

2024-08-04 03:55

Severity ?

Summary

NSS (Network Security Services) versions prior to 3.73 or 3.68.1 ESR are vulnerable to a heap overflow when handling DER-encoded DSA or RSA-PSS signatures. Applications using NSS for handling signatures encoded within CMS, S/MIME, PKCS \#7, or PKCS \#12 are likely to be impacted. Applications using NSS for certificate validation or other TLS, X.509, OCSP or CRL functionality may be impacted, depending on how they configure NSS. *Note: This vulnerability does NOT impact Mozilla Firefox.* However, email clients and PDF viewers that use NSS for signature verification, such as Thunderbird, LibreOffice, Evolution and Evince are believed to be impacted. This vulnerability affects NSS < 3.73 and NSS < 3.68.1.

References

▼	URL	Tags
	https://www.mozilla.org/security/advisories/mfsa2021-51/
	https://bugzilla.mozilla.org/show_bug.cgi?id=1737470
	https://ftp.mozilla.org/pub/security/nss/releases/NSS_3_73_RTM/
	https://ftp.mozilla.org/pub/security/nss/releases/NSS_3_68_1_RTM/
	https://www.oracle.com/security-alerts/cpuapr2022.html
	https://security.netapp.com/advisory/ntap-20211229-0002/
	https://cert-portal.siemens.com/productcert/pdf/ssa-594438.pdf
	https://www.starwindsoftware.com/security/sw-20220802-0001/
	https://security.gentoo.org/glsa/202212-05	vendor-advisory

Impacted products

▼	Vendor	Product
	Mozilla	NSS

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T03:55:29.297Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://www.mozilla.org/security/advisories/mfsa2021-51/"
          },
          {
            "tags": [
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            ],
            "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1737470"
          },
          {
            "tags": [
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            ],
            "url": "https://ftp.mozilla.org/pub/security/nss/releases/NSS_3_73_RTM/"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://ftp.mozilla.org/pub/security/nss/releases/NSS_3_68_1_RTM/"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://www.oracle.com/security-alerts/cpuapr2022.html"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://security.netapp.com/advisory/ntap-20211229-0002/"
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            "tags": [
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            ],
            "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-594438.pdf"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://www.starwindsoftware.com/security/sw-20220802-0001/"
          },
          {
            "name": "GLSA-202212-05",
            "tags": [
              "vendor-advisory",
              "x_transferred"
            ],
            "url": "https://security.gentoo.org/glsa/202212-05"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "NSS",
          "vendor": "Mozilla",
          "versions": [
            {
              "lessThan": "3.73",
              "status": "affected",
              "version": "unspecified",
              "versionType": "custom"
            },
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              "status": "affected",
              "version": "unspecified",
              "versionType": "custom"
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        }
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      "descriptions": [
        {
          "lang": "en",
          "value": "NSS (Network Security Services) versions prior to 3.73 or 3.68.1 ESR are vulnerable to a heap overflow when handling DER-encoded DSA or RSA-PSS signatures. Applications using NSS for handling signatures encoded within CMS, S/MIME, PKCS \\#7, or PKCS \\#12 are likely to be impacted. Applications using NSS for certificate validation or other TLS, X.509, OCSP or CRL functionality may be impacted, depending on how they configure NSS. *Note: This vulnerability does NOT impact Mozilla Firefox.* However, email clients and PDF viewers that use NSS for signature verification, such as Thunderbird, LibreOffice, Evolution and Evince are believed to be impacted. This vulnerability affects NSS \u003c 3.73 and NSS \u003c 3.68.1."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "Memory corruption via DER-encoded DSA and RSA-PSS signatures",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2022-12-19T00:00:00",
        "orgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe",
        "shortName": "mozilla"
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      "references": [
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          "url": "https://www.mozilla.org/security/advisories/mfsa2021-51/"
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        {
          "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1737470"
        },
        {
          "url": "https://ftp.mozilla.org/pub/security/nss/releases/NSS_3_73_RTM/"
        },
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        },
        {
          "url": "https://www.oracle.com/security-alerts/cpuapr2022.html"
        },
        {
          "url": "https://security.netapp.com/advisory/ntap-20211229-0002/"
        },
        {
          "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-594438.pdf"
        },
        {
          "url": "https://www.starwindsoftware.com/security/sw-20220802-0001/"
        },
        {
          "name": "GLSA-202212-05",
          "tags": [
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          ],
          "url": "https://security.gentoo.org/glsa/202212-05"
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      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe",
    "assignerShortName": "mozilla",
    "cveId": "CVE-2021-43527",
    "datePublished": "2021-12-08T00:00:00",
    "dateReserved": "2021-11-08T00:00:00",
    "dateUpdated": "2024-08-04T03:55:29.297Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

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.

Action not permitted