OpenSSL 1.1.1 < 1.1.1d Multiple Vulnerabilities

medium Nessus Plugin ID 128116

Synopsis

The remote service is affected by multiple vulnerabilities.

Description

The version of tested product installed on the remote host is prior to tested version. It is, therefore, affected by the following vulnerabilities :

- Normally in OpenSSL EC groups always have a co-factor present and this is used in side channel resistant code paths. However, in some cases, it is possible to construct a group using explicit parameters (instead of using a named curve). In those cases it is possible that such a group does not have the cofactor present.
This can occur even where all the parameters match a known named curve. If such a curve is used then OpenSSL falls back to non-side channel resistant code paths which may result in full key recovery during an ECDSA signature operation. In order to be vulnerable an attacker would have to have the ability to time the creation of a large number of signatures where explicit parameters with no co-factor present are in use by an application using libcrypto. For the avoidance of doubt libssl is not vulnerable because explicit parameters are never used. OpenSSL versions 1.1.1, 1.1.0 and 1.0.2 are affected by this issue. (CVE-2019-1547)

- OpenSSL 1.1.1 introduced a rewritten random number generator (RNG). This was intended to include protection in the event of a fork() system call in order to ensure that the parent and child processes did not share the same RNG state. However this protection was not being used in the default case. A partial mitigation for this issue is that the output from a high precision timer is mixed into the RNG state so the likelihood of a parent and child process sharing state is significantly reduced. If an application already calls OPENSSL_init_crypto() explicitly using OPENSSL_INIT_ATFORK then this problem does not occur at all. OpenSSL version 1.1.1 is affected by this issue.
(CVE-2019-1549)

- In situations where an attacker receives automated notification of the success or failure of a decryption attempt an attacker, after sending 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, using a Bleichenbacher padding oracle attack.
Applications are not affected if they use a certificate together with the private RSA key to the CMS_decrypt or PKCS7_decrypt functions to select the correct recipient info to decrypt. (CVE-2019-1563)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Upgrade to OpenSSL version 1.1.1d or later.

See Also

http://www.nessus.org/u?c46dca59

https://www.openssl.org/news/secadv/20190910.txt

https://www.openssl.org/news/secadv/20190730.txt

Plugin Details

Severity: Medium

ID: 128116

File Name: openssl_1_1_1d.nasl

Version: 1.8

Type: combined

Agent: windows, macosx, unix

Family: Web Servers

Published: 8/23/2019

Updated: 8/8/2023

Supported Sensors: Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N

CVSS Score Source: CVE-2019-1549

CVSS v3

Risk Factor: Medium

Base Score: 5.3

Temporal Score: 4.6

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:openssl:openssl

Required KB Items: installed_sw/OpenSSL

Exploit Ease: No known exploits are available

Patch Publication Date: 7/30/2019

Vulnerability Publication Date: 7/30/2019

Reference Information

CVE: CVE-2019-1547, CVE-2019-1549, CVE-2019-1552, CVE-2019-1563

IAVA: 2019-A-0303-S