Juniper Junos LAST_ACK State DoS (JSA10686)

high Nessus Plugin ID 85226
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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 due to the improper handling of TCP connection transitions to the LAST_ACK state when the device has more data to send. A remote attacker can exploit this cause the socket to be stuck in the LAST_ACK state indefinitely, leading to exhaustion of memory buffers (mbufs) and connections.

Note that Nessus has not tested for this issue or the host configuration but has instead relied only on the application's self-reported version number.

Solution

Apply the relevant Junos software release or workaround referenced in Juniper advisory JSA10686.

See Also

https://kb.juniper.net/InfoCenter/index?page=content&id=JSA10686

Plugin Details

Severity: High

ID: 85226

File Name: juniper_jsa10686.nasl

Version: 1.7

Type: combined

Published: 8/4/2015

Updated: 7/12/2018

Dependencies: junos_version.nasl

Risk Information

VPR

Risk Factor: Low

Score: 3.4

CVSS v2

Risk Factor: High

Base Score: 7.1

Temporal Score: 5.3

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

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

Vulnerability Information

CPE: cpe:/o:juniper:junos

Required KB Items: Host/Juniper/JUNOS/Version

Exploit Ease: No known exploits are available

Patch Publication Date: 7/8/2015

Vulnerability Publication Date: 7/8/2015

Reference Information

CVE: CVE-2015-5358

BID: 75731