IBM AIX update for OpenSSL



Published: 2019-11-27
Risk Low
Patch available YES
Number of vulnerabilities 2
CVE ID CVE-2019-1563
CVE-2019-1547
CWE ID CWE-310
Exploitation vector Network
Public exploit N/A
Vulnerable software
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IBM AIX
Operating systems & Components / Operating system

Vendor IBM Corporation

Security Advisory

1) Padding oracle attack

Risk: Low

CVSSv3: 3.2 [CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-1563

CWE-ID: CWE-310 - Cryptographic Issues

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform padding oracle attack.

The vulnerability exists due to possibility to perform a Bleichenbacher padding oracle attack against the RSA key, in situations where an attacker receives automated notification of the success or failure of a decryption attempt an attacker. A remote attacker can send a very large number of messages to be decrypted, can recover a CMS/PKCS7 transported encryption key or decrypt any RSA encrypted message that was encrypted with the public RSA key.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

IBM AIX: 7.1, 7.1.1, 7.1.2, 7.1.3, 7.1.4, 7.1.5, 7.2, 7.2.1, 7.2.2, 7.2.3

CPE External links

http://aix.software.ibm.com/aix/efixes/security/openssl_advisory31.asc

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Cryptographic issues

Risk: Low

CVSSv3: 3.2 [CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-1547

CWE-ID: CWE-310 - Cryptographic Issues

Exploit availability: No

Description

The vulnerability allows a remote attacker to decrypt traffic.

The vulnerability exists due to insufficient enforcement of side channel resistant code paths. A remote attacker with ability to create a large number of signatures, where explicit parameters with no co-factor is present, can force the application to fall back to non-side channel resistant code pathsduring ECDSA signature operation and perform full key recovery.

Successful exploitation of the vulnerability may allow an attacker to decrypt communication between server and client.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

IBM AIX: 7.1, 7.1.1, 7.1.2, 7.1.3, 7.1.4, 7.1.5, 7.2, 7.2.1, 7.2.2, 7.2.3

CPE External links

http://aix.software.ibm.com/aix/efixes/security/openssl_advisory31.asc

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.