csaf_redhat - rhsa-2021

rhsa-2021_0056

Vulnerability from csaf_redhat

Published

2021-01-11 10:34

Modified

2024-11-22 15:55

Summary

Red Hat Security Advisory: openssl security update

Notes

Topic

An update for openssl is now available for Red Hat Enterprise Linux 6 Extended Lifecycle Support. 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

OpenSSL is a toolkit that implements the Secure Sockets Layer (SSL) and Transport Layer Security (TLS) protocols, as well as a full-strength general-purpose cryptography library. Security Fix(es): * openssl: EDIPARTYNAME NULL pointer de-reference (CVE-2020-1971) 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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          "text": "A null pointer dereference flaw was found in openssl. A remote attacker, able to control the arguments of the GENERAL_NAME_cmp function, could cause the application, compiled with openssl to crash resulting in a denial of service. The highest threat from this vulnerability is to system availability.",
          "title": "Vulnerability description"
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          "text": "openssl: EDIPARTYNAME NULL pointer de-reference",
          "title": "Vulnerability summary"
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          "text": "This is a flaw in the GENERAL_NAME_cmp function of openssl which can be triggered when both its arguments are of the same type i.e. EDIPARTYNAME. \n\n1. Red Hat does not ship any applications compiled with openssl, which used the above function in a vulnerable way.\n\n2. OpenSSL itself uses the GENERAL_NAME_cmp function for two purposes, when comparing CRL distribution point names between an available CRL and a CRL distribution point embedded in an X509 certificate and when verifying that a timestamp response token signer matches the timestamp authority name (exposed via the API functions TS_RESP_verify_response and TS_RESP_verify_token). If an attacker can control both items being compared then that attacker could trigger a crash. For example, if the attacker can trick a client or server into checking a malicious certificate against a malicious CRL then a crash may be triggered.\n\nThird party applications compiled with openssl using the function GENERAL_NAME_cmp in a vulnerable way are affected by this flaw.\n\nGENERAL_NAME_cmp was added in 0.9.8k, therefore older versions of openssl are not affected by this flaw.",
          "title": "Statement"
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        {
          "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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      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 5.9,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
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          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "openssl: EDIPARTYNAME NULL pointer de-reference"
    }
  ]
}

cve-2020-1971

Vulnerability from cvelistv5

Published

2020-12-08 15:30

Modified

2024-09-17 02:57

Severity ?

Summary

The X.509 GeneralName type is a generic type for representing different types of names. One of those name types is known as EDIPartyName. OpenSSL provides a function GENERAL_NAME_cmp which compares different instances of a GENERAL_NAME to see if they are equal or not. This function behaves incorrectly when both GENERAL_NAMEs contain an EDIPARTYNAME. A NULL pointer dereference and a crash may occur leading to a possible denial of service attack. OpenSSL itself uses the GENERAL_NAME_cmp function for two purposes: 1) Comparing CRL distribution point names between an available CRL and a CRL distribution point embedded in an X509 certificate 2) When verifying that a timestamp response token signer matches the timestamp authority name (exposed via the API functions TS_RESP_verify_response and TS_RESP_verify_token) If an attacker can control both items being compared then that attacker could trigger a crash. For example if the attacker can trick a client or server into checking a malicious certificate against a malicious CRL then this may occur. Note that some applications automatically download CRLs based on a URL embedded in a certificate. This checking happens prior to the signatures on the certificate and CRL being verified. OpenSSL's s_server, s_client and verify tools have support for the "-crl_download" option which implements automatic CRL downloading and this attack has been demonstrated to work against those tools. Note that an unrelated bug means that affected versions of OpenSSL cannot parse or construct correct encodings of EDIPARTYNAME. However it is possible to construct a malformed EDIPARTYNAME that OpenSSL's parser will accept and hence trigger this attack. All OpenSSL 1.1.1 and 1.0.2 versions are affected by this issue. Other OpenSSL releases are out of support and have not been checked. Fixed in OpenSSL 1.1.1i (Affected 1.1.1-1.1.1h). Fixed in OpenSSL 1.0.2x (Affected 1.0.2-1.0.2w).

References

▼	URL	Tags
	https://www.openssl.org/news/secadv/20201208.txt
	https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=f960d81215ebf3f65e03d4d5d857fb9b666d6920
	https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=2154ab83e14ede338d2ede9bbe5cdfce5d5a6c9e
	https://www.debian.org/security/2020/dsa-4807	vendor-advisory
	https://security.FreeBSD.org/advisories/FreeBSD-SA-20:33.openssl.asc	vendor-advisory
	https://lists.debian.org/debian-lts-announce/2020/12/msg00021.html	mailing-list
	https://lists.debian.org/debian-lts-announce/2020/12/msg00020.html	mailing-list
	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DGSI34Y5LQ5RYXN4M2I5ZQT65LFVDOUU/	vendor-advisory
	https://lists.apache.org/thread.html/rbb769f771711fb274e0a4acb1b5911c8aab544a6ac5e8c12d40c5143%40%3Ccommits.pulsar.apache.org%3E	mailing-list
	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PWPSSZNZOBJU2YR6Z4TGHXKYW3YP5QG7/	vendor-advisory
	https://security.gentoo.org/glsa/202012-13	vendor-advisory
	https://www.oracle.com/security-alerts/cpujan2021.html
	https://www.tenable.com/security/tns-2020-11
	https://security.netapp.com/advisory/ntap-20201218-0005/
	https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44676
	https://lists.apache.org/thread.html/r63c6f2dd363d9b514d0a4bcf624580616a679898cc14c109a49b750c%40%3Cdev.tomcat.apache.org%3E	mailing-list
	https://www.oracle.com/security-alerts/cpuApr2021.html
	https://www.tenable.com/security/tns-2021-10
	https://www.tenable.com/security/tns-2021-09
	https://security.netapp.com/advisory/ntap-20210513-0002/
	https://www.oracle.com//security-alerts/cpujul2021.html
	http://www.openwall.com/lists/oss-security/2021/09/14/2	mailing-list
	https://www.oracle.com/security-alerts/cpuoct2021.html
	https://www.oracle.com/security-alerts/cpuapr2022.html
	https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf
	https://security.netapp.com/advisory/ntap-20240621-0006/

Impacted products

Vendor

Product

Version

▼

OpenSSL

Version: Fixed in OpenSSL 1.1.1i (Affected 1.1.1-1.1.1h)
Version: Fixed in OpenSSL 1.0.2x (Affected 1.0.2-1.0.2w)

Show details on NVD website

JSON

To clipboard

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          "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DGSI34Y5LQ5RYXN4M2I5ZQT65LFVDOUU/"
        },
        {
          "name": "[pulsar-commits] 20201216 [GitHub] [pulsar] phijohns-tibco opened a new issue #8978: OpenSSL needs to be updated to 1.1.1i current version is unsupported.",
          "tags": [
            "mailing-list"
          ],
          "url": "https://lists.apache.org/thread.html/rbb769f771711fb274e0a4acb1b5911c8aab544a6ac5e8c12d40c5143%40%3Ccommits.pulsar.apache.org%3E"
        },
        {
          "name": "FEDORA-2020-a31b01e945",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PWPSSZNZOBJU2YR6Z4TGHXKYW3YP5QG7/"
        },
        {
          "name": "GLSA-202012-13",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://security.gentoo.org/glsa/202012-13"
        },
        {
          "url": "https://www.oracle.com/security-alerts/cpujan2021.html"
        },
        {
          "url": "https://www.tenable.com/security/tns-2020-11"
        },
        {
          "url": "https://security.netapp.com/advisory/ntap-20201218-0005/"
        },
        {
          "url": "https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44676"
        },
        {
          "name": "[tomcat-dev] 20210207 [Bug 65126] New: A security vulnerability cve-2020-1971 in Tomcat dependency Library in version 9.0.40.",
          "tags": [
            "mailing-list"
          ],
          "url": "https://lists.apache.org/thread.html/r63c6f2dd363d9b514d0a4bcf624580616a679898cc14c109a49b750c%40%3Cdev.tomcat.apache.org%3E"
        },
        {
          "url": "https://www.oracle.com/security-alerts/cpuApr2021.html"
        },
        {
          "url": "https://www.tenable.com/security/tns-2021-10"
        },
        {
          "url": "https://www.tenable.com/security/tns-2021-09"
        },
        {
          "url": "https://security.netapp.com/advisory/ntap-20210513-0002/"
        },
        {
          "url": "https://www.oracle.com//security-alerts/cpujul2021.html"
        },
        {
          "name": "[oss-security] 20210914 Re: Oracle Solaris membership in the distros list",
          "tags": [
            "mailing-list"
          ],
          "url": "http://www.openwall.com/lists/oss-security/2021/09/14/2"
        },
        {
          "url": "https://www.oracle.com/security-alerts/cpuoct2021.html"
        },
        {
          "url": "https://www.oracle.com/security-alerts/cpuapr2022.html"
        },
        {
          "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf"
        },
        {
          "url": "https://security.netapp.com/advisory/ntap-20240621-0006/"
        }
      ],
      "title": "EDIPARTYNAME NULL pointer dereference"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "3a12439a-ef3a-4c79-92e6-6081a721f1e5",
    "assignerShortName": "openssl",
    "cveId": "CVE-2020-1971",
    "datePublished": "2020-12-08T15:30:16.835255Z",
    "dateReserved": "2019-12-03T00:00:00",
    "dateUpdated": "2024-09-17T02:57:20.238Z",
    "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.

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