Executive Summary

Informations
Name CVE-2021-3450 First vendor Publication 2021-03-25
Vendor Cve Last vendor Modification 2021-10-20

Security-Database Scoring CVSS v3

Cvss vector : CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Overall CVSS Score 7.4
Base Score 7.4 Environmental Score 7.4
impact SubScore 5.2 Temporal Score 7.4
Exploitabality Sub Score 2.2
 
Attack Vector Network Attack Complexity High
Privileges Required None User Interaction None
Scope Unchanged Confidentiality Impact High
Integrity Impact High Availability Impact None
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:M/Au:N/C:P/I:P/A:N)
Cvss Base Score 5.8 Attack Range Network
Cvss Impact Score 4.9 Attack Complexity Medium
Cvss Expoit Score 8.6 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

The X509_V_FLAG_X509_STRICT flag enables additional security checks of the certificates present in a certificate chain. It is not set by default. Starting from OpenSSL version 1.1.1h a check to disallow certificates in the chain that have explicitly encoded elliptic curve parameters was added as an additional strict check. An error in the implementation of this check meant that the result of a previous check to confirm that certificates in the chain are valid CA certificates was overwritten. This effectively bypasses the check that non-CA certificates must not be able to issue other certificates. If a "purpose" has been configured then there is a subsequent opportunity for checks that the certificate is a valid CA. All of the named "purpose" values implemented in libcrypto perform this check. Therefore, where a purpose is set the certificate chain will still be rejected even when the strict flag has been used. A purpose is set by default in libssl client and server certificate verification routines, but it can be overridden or removed by an application. In order to be affected, an application must explicitly set the X509_V_FLAG_X509_STRICT verification flag and either not set a purpose for the certificate verification or, in the case of TLS client or server applications, override the default purpose. OpenSSL versions 1.1.1h and newer are affected by this issue. Users of these versions should upgrade to OpenSSL 1.1.1k. OpenSSL 1.0.2 is not impacted by this issue. Fixed in OpenSSL 1.1.1k (Affected 1.1.1h-1.1.1j).

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3450

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-295 Certificate Issues

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 3
Application 3
Application 1
Application 1
Application 1
Application 1
Application 355
Application 3
Application 1
Application 1
Application 97
Application 2
Application 5
Os 1
Os 3
Os 4

Sources (Detail)

Source Url
CISCO https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-s...
CONFIRM https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=2a40b7bc7b94dd7d...
https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44845
https://kc.mcafee.com/corporate/index?page=content&id=SB10356
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0013
https://security.netapp.com/advisory/ntap-20210326-0006/
https://www.openssl.org/news/secadv/20210325.txt
https://www.tenable.com/security/tns-2021-05
https://www.tenable.com/security/tns-2021-08
https://www.tenable.com/security/tns-2021-09
FEDORA https://lists.fedoraproject.org/archives/list/package-announce@lists.fedorapr...
GENTOO https://security.gentoo.org/glsa/202103-03
MISC https://mta.openssl.org/pipermail/openssl-announce/2021-March/000198.html
https://security.FreeBSD.org/advisories/FreeBSD-SA-21:07.openssl.asc
https://www.oracle.com/security-alerts/cpuApr2021.html
https://www.oracle.com/security-alerts/cpuoct2021.html
MLIST http://www.openwall.com/lists/oss-security/2021/03/27/1
http://www.openwall.com/lists/oss-security/2021/03/27/2
http://www.openwall.com/lists/oss-security/2021/03/28/3
http://www.openwall.com/lists/oss-security/2021/03/28/4
N/A https://www.oracle.com//security-alerts/cpujul2021.html

Alert History

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Date Informations
2021-10-20 17:23:15
  • Multiple Updates
2021-08-05 01:43:12
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2021-07-21 05:23:00
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2021-07-16 05:23:01
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2021-07-14 09:23:10
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2021-06-18 00:22:56
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2021-06-17 21:23:31
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2021-06-15 00:23:03
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2021-05-12 05:22:56
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2021-05-06 17:23:04
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2021-05-04 14:09:59
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2021-04-22 00:23:34
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2021-04-15 13:23:16
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2021-04-14 00:23:14
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2021-04-09 05:23:03
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2021-04-02 09:23:02
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2021-04-02 05:23:07
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2021-04-01 00:23:04
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2021-03-31 21:23:24
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2021-03-29 09:23:00
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2021-03-28 13:23:01
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2021-03-28 00:22:59
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2021-03-27 12:36:13
  • Multiple Updates
2021-03-27 09:23:00
  • Multiple Updates
2021-03-27 05:23:02
  • Multiple Updates
2021-03-26 17:22:59
  • Multiple Updates
2021-03-26 12:38:49
  • First insertion