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.
7.2	$0-$5k	0.00

A vulnerability has been found in Linux Kernel 3.12 (Operating System) and classified as critical. Affected by this vulnerability is the function skb_flow_dissect of the file net/core/flow_dissector.c of the component IHL IP Header Handler. The manipulation with an unknown input leads to a resource management vulnerability. The CWE definition for the vulnerability is CWE-399. As an impact it is known to affect availability. The summary by CVE is:

The skb_flow_dissect function in net/core/flow_dissector.c in the Linux kernel through 3.12 allows remote attackers to cause a denial of service (infinite loop) via a small value in the IHL field of a packet with IPIP encapsulation.

The weakness was presented 10/31/2013 as [PATCH net] net: flow_dissector: fail on evil iph->ihl as not defined posting (Maillist). It is possible to read the advisory at thread.gmane.org. This vulnerability is known as CVE-2013-4348 since 06/12/2013. The attack can be launched remotely. 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 70751 (Fedora 19 : kernel-3.11.6-201.fc19 (2013-20547)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 350492 (Amazon Linux Security Advisory for kernel: ALAS-2013-252).

Applying a patch is able to eliminate this problem. The bugfix is ready for download at thread.gmane.org. A possible mitigation has been published 1 days after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (70751). See 10998 for similar entry.

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 3.12

License

• open-source

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.2

VulDB Base Score: 7.5
VulDB Temp Score: 7.2
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: Resource management
CWE: CWE-399 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	unlock	unlock	unlock	unlock
Today	unlock	unlock	unlock	unlock

Nessus ID: 70751
Nessus Name: Fedora 19 : kernel-3.11.6-201.fc19 (2013-20547)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 867043
OpenVAS Name: Fedora Update for kernel FEDORA-2013-20547
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Patch: thread.gmane.org

Timelineinfo

06/12/2013 🔍
10/31/2013 +141 days 🔍
11/01/2013 +1 days 🔍
11/01/2013 +0 days 🔍
11/04/2013 +3 days 🔍
11/04/2013 +0 days 🔍
11/05/2013 +1 days 🔍
11/06/2013 +1 days 🔍
11/06/2013 +0 days 🔍
06/01/2021 +2764 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: [PATCH net] net: flow_dissector: fail on evil iph->ihl
Status: Not defined
Confirmation: 🔍

CVE: CVE-2013-4348 (🔍)
OVAL: 🔍

Vulnerability Center: 42200 - Linux Kernel Before 3.12 Remote DoS Vulnerability in \x27skb_flow_dissect()\x27, High
SecurityFocus: 63536
Secunia: 55552 - Red Hat update for kernel-rt, Less Critical
OSVDB: 99273

See also: 🔍

Entryinfo

Created: 11/06/2013 11:02
Updated: 06/01/2021 18:15
Changes: 11/06/2013 11:02 (82), 05/15/2017 08:05 (2), 06/01/2021 18:15 (3)
Complete: 🔍
Cache ID: 3:482:103

Discussion

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