OpenSSL 1.0.2 < 1.0.2k Multiple Vulnerabilities

High Nessus Network Monitor Plugin ID 9934

Synopsis

The remote web server is running an outdated instance of OpenSSL and is affected by multiple attack vectors.

Description

According to its banner, the version of OpenSSL on the remote host is version 1.0.2 prior to 1.0.2k and is affected by multiple vulnerabilities :

- An out-of-bounds read flaw exists in 'crypto/evp/e_chacha20_poly1305.c' that is triggered during the handling of packets when using the CHACHA20/POLY1305 cipher. This may allow a remote attacker to crash a process linked against the library. (CVE-2017-3731)
- A carry propagating flaw exists in the Montgomery squaring procedure in 'crypto/bn/asm/x86_64-mont5.pl'. This may cause 'BN_mod_exp' to produce incorrect results, which may potentially allow an attacker to derive information regarding private keys. (CVE-2017-3732)

Solution

Upgrade OpenSSL to version 1.0.2k or higher

See Also

https://www.openssl.org/news/secadv/20170126.txt

Plugin Details

Severity: High

ID: 9934

File Name: 9934.prm

Family: Web Servers

Published: 2017/02/02

Modified: 2017/02/02

Dependencies: 5563

Nessus ID: 96873

Risk Information

Risk Factor: High

CVSSv2

Base Score: 7.8

Temporal Score: 6.8

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

Temporal Vector: CVSS2#E:ND/RL:OF/RC:C

CVSSv3

Base Score: 7.5

Temporal Score: 7.2

Vector: CVSS3#AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS3#E:X/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:openssl:openssl

Patch Publication Date: 2017/01/26

Vulnerability Publication Date: 2017/01/26

Reference Information

CVE: CVE-2017-3731, CVE-2017-3732

BID: 95813, 95814