CVE Vulnerabilities

CVE-2018-16463

Session Fixation

Published: Oct 30, 2018 | Modified: Nov 21, 2024
CVSS 3.x
3.1
LOW
Source:
NVD
CVSS:3.0/AV:N/AC:H/PR:H/UI:R/S:U/C:L/I:L/A:N
CVSS 2.x
3.6 LOW
AV:N/AC:H/Au:S/C:P/I:P/A:N
RedHat/V2
RedHat/V3
Ubuntu

A bug causing session fixation in Nextcloud Server prior to 14.0.0, 13.0.3 and 12.0.8 could potentially allow an attacker to obtain access to password protected shares.

Weakness

Authenticating a user, or otherwise establishing a new user session, without invalidating any existing session identifier gives an attacker the opportunity to steal authenticated sessions.

Affected Software

Name Vendor Start Version End Version
Nextcloud_server Nextcloud * 12.0.8 (excluding)
Nextcloud_server Nextcloud 13.0.0 (including) 13.0.3 (excluding)
Nextcloud_server Nextcloud 14.0.0-beta1 (including) 14.0.0-beta1 (including)
Nextcloud_server Nextcloud 14.0.0-beta2 (including) 14.0.0-beta2 (including)
Nextcloud_server Nextcloud 14.0.0-beta3 (including) 14.0.0-beta3 (including)
Nextcloud_server Nextcloud 14.0.0-beta4 (including) 14.0.0-beta4 (including)
Nextcloud_server Nextcloud 14.0.0-rc1 (including) 14.0.0-rc1 (including)
Nextcloud_server Nextcloud 14.0.0-rc2 (including) 14.0.0-rc2 (including)

Extended Description

Such a scenario is commonly observed when:

In the generic exploit of session fixation vulnerabilities, an attacker creates a new session on a web application and records the associated session identifier. The attacker then causes the victim to associate, and possibly authenticate, against the server using that session identifier, giving the attacker access to the user’s account through the active session.

Potential Mitigations

References