Apport up to 2.18 /var/crash/vmcore.log kernel_crashdump 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.
4.8	$0-$5k	0.00

Summaryinfo

A vulnerability identified as problematic has been detected in Apport up to 2.18. This affects the function kernel_crashdump of the file /var/crash/vmcore.log. The manipulation leads to link following. This vulnerability is referenced as CVE-2015-1338. Furthermore, an exploit is available. You should upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Apport up to 2.18. This issue affects the function kernel_crashdump of the file /var/crash/vmcore.log. The manipulation with an unknown input leads to a link following vulnerability. Using CWE to declare the problem leads to 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. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

kernel_crashdump in Apport before 2.19 allows local users to cause a denial of service (disk consumption) or possibly gain privileges via a (1) symlink or (2) hard link attack on /var/crash/vmcore.log.

The weakness was published 10/01/2015 by halfdog (Website). The advisory is shared at launchpad.net. The identification of this vulnerability is CVE-2015-1338 since 01/22/2015. An attack has to be approached locally. A simple authentication is required for exploitation. Technical details as well as a public exploit are known.

A public exploit has been developed by halfdog and been published before and not just after the advisory. The exploit is available at exploit-db.com. It is declared as proof-of-concept. By approaching the search of inurl:var/crash/vmcore.log it is possible to find vulnerable targets with Google Hacking. The vulnerability scanner Nessus provides a plugin with the ID 86145 (Ubuntu 12.04 LTS / 14.04 LTS / 15.04 : apport vulnerability (USN-2744-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Ubuntu Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 170206 (SUSE Enterprise Linux Security Update for apport (SUSE-SU-2017:1938-1)).

Upgrading to version 2.19 eliminates this vulnerability. A possible mitigation has been published before and not just after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Exploit-DB (38353), Tenable (86145), SecurityFocus (BID 76841†) and Vulnerability Center (SBV-54629†). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Name

• Apport

Version

• 2.0
• 2.1
• 2.2
• 2.3
• 2.4
• 2.5
• 2.6
• 2.7
• 2.8
• 2.9
• 2.10
• 2.11
• 2.12
• 2.13
• 2.14
• 2.15
• 2.16
• 2.17
• 2.18

License

• free

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 4.8

VulDB Base Score: 5.3
VulDB Temp Score: 4.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

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

NVD Base Score: 🔍

Exploitinginfo

Class: Link following
CWE: CWE-59
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Author: halfdog
Download: 🔍
Google Hack: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 86145
Nessus Name: Ubuntu 12.04 LTS / 14.04 LTS / 15.04 : apport vulnerability (USN-2744-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 841810
OpenVAS Name: Ubuntu Update for apport USN-2744-1
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Apport 2.19

Timelineinfo

01/22/2015 🔍
09/24/2015 +245 days 🔍
09/24/2015 +0 days 🔍
09/24/2015 +0 days 🔍
09/25/2015 +1 days 🔍
09/29/2015 +4 days 🔍
09/29/2015 +0 days 🔍
10/01/2015 +2 days 🔍
10/01/2015 +0 days 🔍
10/02/2015 +1 days 🔍
11/26/2015 +55 days 🔍
11/24/2024 +3286 days 🔍

Sourcesinfo

Advisory: USN-2744-1
Researcher: halfdog
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2015-1338 (🔍)
GCVE (CVE): GCVE-0-2015-1338
GCVE (VulDB): GCVE-100-78185
SecurityFocus: 76841 - Apport CVE-2015-1338 Insecure Temporary File Handling Vulnerability
Vulnerability Center: 54629 - Apport <2.19 Local DoS or Privilege Escalation via a Link attack on /var/crash/vmcore.log, High

scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 10/02/2015 10:27
Updated: 11/24/2024 02:26
Changes: 10/02/2015 10:27 (58), 04/20/2018 09:27 (23), 06/20/2022 07:25 (3), 11/24/2024 02:26 (14)
Complete: 🔍
Cache ID: 216:27A:103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Discussion

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