CUPS 1.7.0/1.7.1 lppasswd systemv/llpasswd.c cupsUser link following

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
7.3$0-$5k0.00

A vulnerability classified as critical was found in CUPS 1.7.0/1.7.1 (Printing Software). Affected by this vulnerability is the function cupsUser of the file systemv/llpasswd.c of the component lppasswd. The manipulation with an unknown input leads to a link following vulnerability. The CWE definition for the vulnerability is CWE-59. The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource. As an impact it is known to affect confidentiality, integrity, and availability.

The weakness was presented 01/10/2014 by Jann Horn as STR #4319 as confirmed bug report (Website). It is possible to read the advisory at cups.org. This vulnerability is known as CVE-2013-6891 since 11/28/2013. The exploitation appears to be easy. Attacking locally is a requirement. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 71977 (CUPS 1.6.x >= 1.6.4 / 1.7.x < 1.7.1 lppasswd Information Disclosure), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Misc..

Applying the patch str4319.patch is able to eliminate this problem. The bugfix is ready for download at cups.org.

The vulnerability is also documented in the databases at X-Force (90628) and Tenable (71977).

Productinfo

Type

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv3info

VulDB Meta Base Score: 8.4
VulDB Meta Temp Score: 7.3

VulDB Base Score: 8.4
VulDB Temp Score: 7.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
unlockunlockunlockunlockunlockunlock
unlockunlockunlockunlockunlockunlock
unlockunlockunlockunlockunlockunlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Link following
CWE: CWE-59
ATT&CK: Unknown

Local: Yes
Remote: No

Availability: 🔍
Status: Unproven

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Dayunlockunlockunlockunlock
Todayunlockunlockunlockunlock

Nessus ID: 71977
Nessus Name: CUPS 1.6.x >= 1.6.4 / 1.7.x < 1.7.1 lppasswd Information Disclosure
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 841688
OpenVAS Name: Ubuntu Update for cups USN-2082-1
OpenVAS File: 🔍
OpenVAS Family: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: str4319.patch

Timelineinfo

11/28/2013 🔍
12/19/2013 +21 days 🔍
12/19/2013 +0 days 🔍
01/10/2014 +22 days 🔍
01/15/2014 +5 days 🔍
01/16/2014 +1 days 🔍
01/25/2014 +9 days 🔍
02/03/2014 +9 days 🔍
02/25/2014 +22 days 🔍
06/09/2021 +2661 days 🔍

Sourcesinfo

Advisory: STR #4319
Researcher: Jann Horn
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2013-6891 (🔍)
OVAL: 🔍

X-Force: 90628 - CUPS lppasswd.c privilege escalation, High Risk
Vulnerability Center: 43120 - Cups Before 1.7.1 Local File System Read Vulnerability via a Modified HOME Environment Variable, Low
SecurityFocus: 64985 - cups 'systemv/lppasswd.c' Local Privilege Escalation Vulnerability
Secunia: 56531 - Ubuntu update for cups, Not Critical

Entryinfo

Created: 02/25/2014 09:18 AM
Updated: 06/09/2021 08:03 PM
Changes: 02/25/2014 09:18 AM (79), 05/20/2017 10:15 AM (5), 06/09/2021 08:03 PM (3)
Complete: 🔍
Committer: olku

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Are you interested in using VulDB?

Download the whitepaper to learn more about our service!