CVE-2021-4044
Description
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).
EPSS (Exploit Prediction Scoring System)
EPSS (Exploit Prediction Scoring System)
Prevede la probabilità di sfruttamento basata su intelligence sulle minacce e sulle caratteristiche della vulnerabilità.
EPSS Score Trend (Last 90 Days)
Loop with Unreachable Exit Condition ('Infinite Loop')
IncompleteCommon Consequences
Applicable Platforms
H700E Firmware by Netapp
cpe:2.3:o:netapp:h700e_firmware:-:*:*:*:*:*:*:*
H300E Firmware by Netapp
cpe:2.3:o:netapp:h300e_firmware:-:*:*:*:*:*:*:*
A250 Firmware by Netapp
cpe:2.3:o:netapp:a250_firmware:-:*:*:*:*:*:*:*
H410C Firmware by Netapp
cpe:2.3:o:netapp:h410c_firmware:-:*:*:*:*:*:*:*
E-Series Performance Analyzer by Netapp
cpe:2.3:a:netapp:e-series_performance_analyzer:-:*:*:*:*:*:*:*
H500E Firmware by Netapp
cpe:2.3:o:netapp:h500e_firmware:-:*:*:*:*:*:*:*
H700S Firmware by Netapp
cpe:2.3:o:netapp:h700s_firmware:-:*:*:*:*:*:*:*
Cloud Backup by Netapp
cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:*
Openssl by Openssl
cpe:2.3:a:openssl:openssl:3.0.0:*:*:*:*:*:*:*
H300S Firmware by Netapp
cpe:2.3:o:netapp:h300s_firmware:-:*:*:*:*:*:*:*
Openssl by Openssl
cpe:2.3:a:openssl:openssl:1.1.0:*:*:*:*:*:*:*
H500S Firmware by Netapp
cpe:2.3:o:netapp:h500s_firmware:-:*:*:*:*:*:*:*
Snapcenter by Netapp
cpe:2.3:a:netapp:snapcenter:-:*:*:*:*:*:*:*
H410S Firmware by Netapp
cpe:2.3:o:netapp:h410s_firmware:-:*:*:*:*:*:*:*
Openssl by Openssl
cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*
Ontap Select Deploy Administration Utility by Netapp
cpe:2.3:a:netapp:ontap_select_deploy_administration_utility:-:*:*:*:*:*:*:*
500F Firmware by Netapp
cpe:2.3:o:netapp:500f_firmware:-:*:*:*:*:*:*:*
Node.Js by Nodejs
cpe:2.3:a:nodejs:node.js:*:*:*:*:-:*:*:*