| Vulnerability Name: | CVE-2021-4044 (CCN-215348) | ||||||||||||||||
| Assigned: | 2021-12-14 | ||||||||||||||||
| Published: | 2021-12-14 | ||||||||||||||||
| Updated: | 2022-08-29 | ||||||||||||||||
| Summary: | Internally libssl in OpenSSL calls X509_verify_cert() on the client side to verify a certificate supplied by a server. That function may return a negative return value to indicate an internal error (for example out of memory). Such a negative return value is mishandled by OpenSSL and will cause an IO function (such as SSL_connect() or SSL_do_handshake()) to not indicate success and a subsequent call to SSL_get_error() to return the value SSL_ERROR_WANT_RETRY_VERIFY. This return value is only supposed to be returned by OpenSSL if the application has previously called SSL_CTX_set_cert_verify_callback(). Since most applications do not do this the SSL_ERROR_WANT_RETRY_VERIFY return value from SSL_get_error() will be totally unexpected and applications may not behave correctly as a result. The exact behaviour will depend on the application but it could result in crashes, infinite loops or other similar incorrect responses. This issue is made more serious in combination with a separate bug in OpenSSL 3.0 that will cause X509_verify_cert() to indicate an internal error when processing a certificate chain. This will occur where a certificate does not include the Subject Alternative Name extension but where a Certificate Authority has enforced name constraints. This issue can occur even with valid chains. By combining the two issues an attacker could induce incorrect, application dependent behaviour. Fixed in OpenSSL 3.0.1 (Affected 3.0.0). | ||||||||||||||||
| CVSS v3 Severity: | 7.5 High (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H) 6.5 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C)
5.7 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H/E:U/RL:O/RC:C)
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| CVSS v2 Severity: | 5.0 Medium (CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P)
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| Vulnerability Type: | CWE-835 | ||||||||||||||||
| Vulnerability Consequences: | Bypass Security | ||||||||||||||||
| References: | Source: MITRE Type: CNA CVE-2021-4044 Source: XF Type: UNKNOWN openssl-cve20214044-sec-bypass(215348) Source: CONFIRM Type: Patch, Third Party Advisory https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=758754966791c537ea95241438454aa86f91f256 Source: CONFIRM Type: Vendor Advisory https://security.netapp.com/advisory/ntap-20211229-0003/ Source: CCN Type: IBM Security Bulletin 6597229 (Engineering Workflow Management) Rational Team Concert (RTC) and IBM Engineering Workflow Management (EWM) OpenSSL vulnerability CVE-2021-4044 Source: CCN Type: IBM Security Bulletin 6616499 (b-type SAN directors and switches) Vulnerability in Fabric OS firmware used by IBM b-type SAN directors and switches. Source: CCN Type: OpenSSL Security Advisory [14 December 2021] OpenSSL Security Advisory [14 December 2021] Source: CONFIRM Type: Vendor Advisory https://www.openssl.org/news/secadv/20211214.txt | ||||||||||||||||
| Vulnerable Configuration: | Configuration 1: Configuration 2: Configuration 3: Configuration 4: Configuration 5: Configuration 6: Configuration 7: Configuration 8: Configuration 9: Configuration 10: Configuration 11: Configuration 12: Configuration 13: Configuration CCN 1:  Denotes that component is vulnerable | ||||||||||||||||
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