Juniper Junos SSL/TLS Renegotiation DoS (JSA10580)

medium Nessus Plugin ID 68913
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Synopsis

The remote device is missing a vendor-supplied security patch.

Description

According to its self-reported version number, the remote Juniper Junos device is affected by a denial of service vulnerability. The SSL/TLS implementation on the remote host allows clients to renegotiate connections. The computational requirements for renegotiating a connection are asymmetrical between the client and the server, with the server performing several times more work. Since the remote host does not appear to limit the number of renegotiations for a single TLS / SSL connection, this permits a client to open several simultaneous connections and repeatedly renegotiate them, possibly leading to a denial of service condition.

Note that this issue only affects devices with J-Web or the SSL service for JUNOScript enabled.

Solution

Apply the relevant Junos software release or workaround referenced in Juniper advisory JSA10580.

See Also

http://www.ietf.org/mail-archive/web/tls/current/msg07553.html

https://kb.juniper.net/InfoCenter/index?page=content&id=JSA10580

Plugin Details

Severity: Medium

ID: 68913

File Name: juniper_jsa10580.nasl

Version: 1.10

Type: combined

Published: 7/16/2013

Updated: 7/12/2018

Dependencies: junos_version.nasl

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.2

Vector: AV:N/AC:M/Au:N/C:N/I:N/A:P

Temporal Vector: E:U/RL:OF/RC:C

Vulnerability Information

CPE: cpe:/o:juniper:junos

Required KB Items: Host/Juniper/JUNOS/Version, Host/Juniper/JUNOS/BuildDate

Exploit Ease: No known exploits are available

Patch Publication Date: 7/12/2013

Vulnerability Publication Date: 3/13/2011

Reference Information

CVE: CVE-2011-1473

BID: 48626

JSA: JSA10580