7.4 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H
4 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
HIGH
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:H/Au:N/C:P/I:N/A:P
0.001 Low
EPSS
Percentile
44.2%
There is a type confusion vulnerability relating to X.400 address processing
inside an X.509 GeneralName
. X.400 addresses were parsed as an ASN1_STRING
but
the public structure definition for GENERAL_NAME
incorrectly specified the type
of the x400Address
field as ASN1_TYPE
. This field is subsequently interpreted by
the OpenSSL function GENERAL_NAME_cmp
as an ASN1_TYPE
rather than an
ASN1_STRING
.
When CRL checking is enabled (i.e. the application sets the
X509_V_FLAG_CRL_CHECK
flag), this vulnerability may allow an attacker to pass
arbitrary pointers to a memcmp
call, enabling them to read memory contents or
enact a denial of service. In most cases, the attack requires the attacker to
provide both the certificate chain and CRL, neither of which need to have a
valid signature. If the attacker only controls one of these inputs, the other
input must already contain an X.400 address as a CRL distribution point, which
is uncommon. As such, this vulnerability is most likely to only affect
applications which have implemented their own functionality for retrieving CRLs
over a network.
CPE | Name | Operator | Version |
---|---|---|---|
openssl-src | lt | 111.25.0 | |
openssl-src | ge | 300.0.0 | |
openssl-src | lt | 300.0.12 |
7.4 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H
4 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
HIGH
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:H/Au:N/C:P/I:N/A:P
0.001 Low
EPSS
Percentile
44.2%