PolarSSL Weak Signature Algorithm Negotiation

medium Nessus Plugin ID 80399

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Synopsis

The remote TLS server negotiates a weaker signature algorithm.

Description

PolarSSL 1.3.8 does not properly negotiate the signature algorithm to use, allowing remote attackers to conduct downgrade attacks.

This plugin sends a list of hash algorithms (SHA512, SHA384, SHA256, SHA224, SHA1, and MD5) in descending order, and checks if the server selects MD5.

Solution

Use a PolarSSL version other than 1.3.8.

Plugin Details

Severity: Medium

ID: 80399

File Name: polarssl_cve-2014-8627.nasl

Version: 1.12

Type: remote

Family: General

Published: 1/7/2015

Updated: 6/12/2020

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 1.4

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

CVSS Score Source: CVE-2014-8627

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:N/I:L/A:N

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

Vulnerability Information

CPE: cpe:/a:polarssl:polarssl

Required KB Items: SSL/Supported

Exploit Ease: No known exploits are available

Patch Publication Date: 11/22/2014

Vulnerability Publication Date: 11/22/2014

Reference Information

CVE: CVE-2014-8627

BID: 70902

Detections

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