CVE Vulnerabilities

CVE-2017-10600

Session Fixation

Published: Jul 11, 2017 | Modified: Apr 20, 2025
CVSS 3.x
5.9
MEDIUM
Source:
NVD
CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
CVSS 2.x
4.6 MEDIUM
AV:L/AC:L/Au:N/C:P/I:P/A:P
RedHat/V2
RedHat/V3
Ubuntu
HIGH

ubuntu-image 1.0 before 2017-07-07, when invoked as non-root, creates files in the resulting image with the uid of the invoking user. When the resulting image is booted, a local attacker with the same uid as the image creator has unintended access to cloud-init and snapd directories.

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
Ubuntu-image Canonical 1.0-2017-07-06 (including) 1.0-2017-07-06 (including)
Ubuntu-image Ubuntu devel *
Ubuntu-image Ubuntu esm-infra/xenial *
Ubuntu-image Ubuntu upstream *
Ubuntu-image Ubuntu xenial *
Ubuntu-image Ubuntu yakkety *
Ubuntu-image Ubuntu zesty *

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