Arista Networks EOS 4.17 Multiple Vulnerabilities (SA0024) (SWEET32)
medium Nessus Plugin ID 107067
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VPR Score: 4.4
Synopsis
The version of Arista Networks EOS running on the remote device is affected by multiple vulnerabilities.Description
The version of Arista Networks EOS running on the remote device is affected by multiple vulnerabilities in the included OpenSSL library :- An information disclosure vulnerability exists in the dsa_sign_setup() function in dsa_ossl.c due to a failure to properly ensure the use of constant-time operations.
An unauthenticated, remote attacker can exploit this, via a timing side-channel attack, to disclose DSA key information. (CVE-2016-2178)
- A vulnerability exists, known as SWEET32, in the 3DES and Blowfish algorithms due to the use of weak 64-bit block ciphers by default. A man-in-the-middle attacker who has sufficient resources can exploit this vulnerability, via a 'birthday' attack, to detect a collision that leaks the XOR between the fixed secret and a known plaintext, allowing the disclosure of the secret text, such as secure HTTPS cookies, and possibly resulting in the hijacking of an authenticated session.
(CVE-2016-2183)
- A flaw exists in the ssl_parse_clienthello_tlsext() function in t1_lib.c due to improper handling of overly large OCSP Status Request extensions from clients. An unauthenticated, remote attacker can exploit this, via large OCSP Status Request extensions, to exhaust memory resources, resulting in a denial of service condition.
(CVE-2016-6304)
Solution
Contact the vendor for a fixed version. Alternatively, apply the recommended mitigations referenced in the vendor advisory.See Also
Plugin Details
Severity: Medium
ID: 107067
File Name: arista_eos_sa0024_4_17.nasl
Version: 1.10
Type: combined
Family: Misc.
Published: 2/28/2018
Updated: 3/13/2020
Dependencies: arista_eos_detect.nbin
Risk Information
Risk Factor: Medium
VPR Score: 4.4
CVSS Score Source: CVE-2016-2183
CVSS v2.0
Base Score: 5
Temporal Score: 3.9
Vector: AV:N/AC:L/Au:N/C:P/I:N/A:N
Temporal Vector: E:POC/RL:OF/RC:C
CVSS v3.0
Base Score: 7.5
Temporal Score: 6.7
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Temporal Vector: E:P/RL:O/RC:C
Vulnerability Information
CPE: cpe:/o:arista:eos
Required KB Items: Host/Arista-EOS/Version
Exploit Available: true
Exploit Ease: Exploits are available
Patch Publication Date: 10/4/2016
Vulnerability Publication Date: 6/6/2016