5 Medium
CVSS2
Attack Vector
NETWORK
Attack 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
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
0.008 Low
EPSS
Percentile
82.3%
Issue Overview:
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 permissible 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. (CVE-2021-23840)
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. (CVE-2021-23841)
Affected Packages:
openssl
Issue Correction:
Run yum update openssl to update your system.
New Packages:
i686:
openssl-devel-1.0.2k-16.153.amzn1.i686
openssl-perl-1.0.2k-16.153.amzn1.i686
openssl-debuginfo-1.0.2k-16.153.amzn1.i686
openssl-1.0.2k-16.153.amzn1.i686
openssl-static-1.0.2k-16.153.amzn1.i686
src:
openssl-1.0.2k-16.153.amzn1.src
x86_64:
openssl-static-1.0.2k-16.153.amzn1.x86_64
openssl-devel-1.0.2k-16.153.amzn1.x86_64
openssl-perl-1.0.2k-16.153.amzn1.x86_64
openssl-1.0.2k-16.153.amzn1.x86_64
openssl-debuginfo-1.0.2k-16.153.amzn1.x86_64
Red Hat: CVE-2021-23840, CVE-2021-23841
Mitre: CVE-2021-23840, CVE-2021-23841
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
Amazon Linux | 1 | i686 | openssl-devel | < 1.0.2k-16.153.amzn1 | openssl-devel-1.0.2k-16.153.amzn1.i686.rpm |
Amazon Linux | 1 | i686 | openssl-perl | < 1.0.2k-16.153.amzn1 | openssl-perl-1.0.2k-16.153.amzn1.i686.rpm |
Amazon Linux | 1 | i686 | openssl-debuginfo | < 1.0.2k-16.153.amzn1 | openssl-debuginfo-1.0.2k-16.153.amzn1.i686.rpm |
Amazon Linux | 1 | i686 | openssl | < 1.0.2k-16.153.amzn1 | openssl-1.0.2k-16.153.amzn1.i686.rpm |
Amazon Linux | 1 | i686 | openssl-static | < 1.0.2k-16.153.amzn1 | openssl-static-1.0.2k-16.153.amzn1.i686.rpm |
Amazon Linux | 1 | x86_64 | openssl-static | < 1.0.2k-16.153.amzn1 | openssl-static-1.0.2k-16.153.amzn1.x86_64.rpm |
Amazon Linux | 1 | x86_64 | openssl-devel | < 1.0.2k-16.153.amzn1 | openssl-devel-1.0.2k-16.153.amzn1.x86_64.rpm |
Amazon Linux | 1 | x86_64 | openssl-perl | < 1.0.2k-16.153.amzn1 | openssl-perl-1.0.2k-16.153.amzn1.x86_64.rpm |
Amazon Linux | 1 | x86_64 | openssl | < 1.0.2k-16.153.amzn1 | openssl-1.0.2k-16.153.amzn1.x86_64.rpm |
Amazon Linux | 1 | x86_64 | openssl-debuginfo | < 1.0.2k-16.153.amzn1 | openssl-debuginfo-1.0.2k-16.153.amzn1.x86_64.rpm |
5 Medium
CVSS2
Attack Vector
NETWORK
Attack 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
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
0.008 Low
EPSS
Percentile
82.3%