OpenSSL 1.1.0 < 1.1.0c Multiple Vulnerabilities

high Nessus Plugin ID 94963

Synopsis

The remote service is affected by multiple vulnerabilities.

Description

The version of OpenSSL installed on the remote host is prior to 1.1.0c. It is, therefore, affected by multiple vulnerabilities as referenced in the 1.1.0c advisory.

- There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure in OpenSSL 1.0.2 and 1.1.0 before 1.1.0c that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. (CVE-2016-7055)

- In OpenSSL 1.1.0 before 1.1.0c, TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. (CVE-2016-7054)

- In OpenSSL 1.1.0 before 1.1.0c, applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected.
(CVE-2016-7053)

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 1.1.0c or later.

See Also

http://www.nessus.org/u?c5072107

http://www.nessus.org/u?db90cfd5

http://www.nessus.org/u?e57daf59

https://www.cve.org/CVERecord?id=CVE-2016-7053

https://www.cve.org/CVERecord?id=CVE-2016-7054

https://www.cve.org/CVERecord?id=CVE-2016-7055

https://www.openssl.org/news/secadv/20161110.txt

Plugin Details

Severity: High

ID: 94963

File Name: openssl_1_1_0c.nasl

Version: 1.14

Type: combined

Agent: windows, macosx, unix

Family: Web Servers

Published: 11/18/2016

Updated: 10/23/2024

Configuration: Enable thorough checks

Supported Sensors: Continuous Assessment, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.9

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

CVSS Score Source: CVE-2016-7054

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.7

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

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

Vulnerability Information

CPE: cpe:/a:openssl:openssl

Required KB Items: installed_sw/OpenSSL

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 11/10/2016

Vulnerability Publication Date: 11/10/2016

Reference Information

CVE: CVE-2016-7053, CVE-2016-7054, CVE-2016-7055

BID: 94238, 94242, 94244