CVE-2018-17934

published 2018-11-27

CVE-2018-17934: NUUO CMS All versions 3.3 and prior the application allows external input to construct a pathname that is able to be resolved outside the intended directory…

Priority P2 70 critical 9.8 CVSS 3.0

AV N AC L PR N UI N S U C H I H A H

EXPLOIT

NUUO CMS All versions 3.3 and prior the application allows external input to construct a pathname that is able to be resolved outside the intended directory. This could allow an attacker to impersonate a legitimate user, obtain restricted information, or execute arbitrary code.

Affected

2 ranges

Vendor	Product	Version range	Fixed in
nuuo	nuuo_cms	<= 3.3	—
nuuo	nuuo_cms	—	—

Detection & IOCs extracted from sources · hover to see the quote

filename CMServer.cfg↗

filename ServerConfig.cfg↗

• → Monitor for directory traversal sequences in HTTP requests targeting the NUUO CMS file download functionality, which can be used to retrieve files outside the intended installation directory. ↗
• → Alert on requests for CMServer.cfg or ServerConfig.cfg from the NUUO CMS server, as these files contain sensitive credentials and are targeted by exploitation of this vulnerability. ↗
• → Detect session token guessing/brute-force attempts against NUUO CMS, as the exploit module can use a guessed session number to authenticate before performing file download. ↗

• · All NUUO CMS versions up to and including 3.5 are confirmed vulnerable, broader than the NVD-stated scope of 3.3 and prior. ↗
• · The .cfg credential files are zip-encrypted and cannot be decrypted programmatically via Metasploit; manual extraction with the default ZIP password is required. ↗
• · Exploitation requires authentication, but the attacker can leverage default credentials or a guessed session token to satisfy this requirement. ↗

CVSS provenance

nvd v3.0 9.8 CRITICAL CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

nvd v2.0 7.5 HIGH AV:N/AC:L/Au:N/C:P/I:P/A:P

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