7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
5 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
0.008 Low
EPSS
Percentile
82.1%
The OpenSSL project reports:
Null pointer deref in X509_issuer_and_serial_hash()
CVE-2021-23841(Moderate) The OpenSSL public API function
X509_issuer_and_serial_hash() attempts to create a unique hash
value based on the issuer and serial number data contained within
an X509 certificate. However it fails to correctly handle any errors
that may occur while parsing the issuer field (which might occur if
the issuer field is maliciously constructed). This may subsequently
result in a NULL pointer deref and a crash leading to a potential
denial of service attack.
Integer overflow in CipherUpdate CVE-2021-23840(Low)
Calls to EVP_CipherUpdate, EVP_EncryptUpdate and EVP_DecryptUpdate
may overflow the output length argument in some cases where the
input length is close to the maximum permissable length for an
integer on the platform. In such cases the return value from the
function call will be 1 (indicating success), but the output length
value will be negative. This could cause applications to behave
incorrectly or crash.
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
5 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
0.008 Low
EPSS
Percentile
82.1%