Linux Kernel up to 3.13.6 DCCP Packet nf_conntrack_proto_dccp.c skb_header_pointer input validation

CVSS Meta Temp Score
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CTI Interest Score
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8.7$0-$5k0.00

Summaryinfo

A vulnerability classified as critical has been found in Linux Kernel up to 3.13.6. This affects the function skb_header_pointer of the file netfilter/nf_conntrack_proto_dccp.c of the component DCCP Packet Handler. Performing a manipulation results in input validation. This vulnerability is cataloged as CVE-2014-2523. There is no exploit available. Applying a patch is the recommended action to fix this issue.

Detailsinfo

A vulnerability was found in Linux Kernel up to 3.13.6 (Operating System). It has been classified as critical. This affects the function skb_header_pointer of the file netfilter/nf_conntrack_proto_dccp.c of the component DCCP Packet Handler. The manipulation with an unknown input leads to a input validation vulnerability. CWE is classifying the issue as CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

net/netfilter/nf_conntrack_proto_dccp.c in the Linux kernel through 3.13.6 uses a DCCP header pointer incorrectly, which allows remote attackers to cause a denial of service (system crash) or possibly execute arbitrary code via a DCCP packet that triggers a call to the (1) dccp_new, (2) dccp_packet, or (3) dccp_error function.

The weakness was shared 01/06/2014 as netfilter: nf_conntrack_dccp: fix skb_header_pointer API usages as confirmed git commit (GIT Repository). The advisory is shared at git.kernel.org. This vulnerability is uniquely identified as CVE-2014-2523 since 03/17/2014. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details are known, but no exploit is available. The reason for this vulnerability is this part of code: 

dh = skb_header_pointer(skb, dataoff, sizeof(_dh), &dh);

The vulnerability scanner Nessus provides a plugin with the ID 73241 (Fedora 20 : kernel-3.13.7-200.fc20 (2014-4317)), 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 167228 (SUSE Enterprise Linux Security Update for Linux Kernel (SUSE-SU-2014:0807-1)).

Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. A possible mitigation has been published immediately after the disclosure of the vulnerability. The vulnerability will be addressed with the following lines of code:

dh = skb_header_pointer(skb, dataoff, sizeof(_dh), &_dh);

The vulnerability is also documented in the databases at X-Force (91910), Tenable (73241), SecurityFocus (BID 66279†), Secunia (SA57446†) and Vulnerability Center (SBV-43681†). The entries VDB-11302, VDB-11755, VDB-12214 and VDB-12411 are related to this item. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 10.0
VulDB Meta Temp Score: 8.7

VulDB Base Score: 10.0
VulDB Temp Score: 8.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
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Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Unproven

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 73241
Nessus Name: Fedora 20 : kernel-3.13.7-200.fc20 (2014-4317)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 881932
OpenVAS Name: CentOS Update for kernel CESA-2014:0475 centos6
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

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

Patch: git.kernel.org

Timelineinfo

01/06/2014 🔍
01/06/2014 +0 days 🔍
03/17/2014 +70 days 🔍
03/18/2014 +1 days 🔍
03/18/2014 +0 days 🔍
03/18/2014 +0 days 🔍
03/19/2014 +1 days 🔍
03/21/2014 +2 days 🔍
03/24/2014 +3 days 🔍
05/08/2026 +4428 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: netfilter: nf_conntrack_dccp: fix skb_header_pointer API usages
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2014-2523 (🔍)
GCVE (CVE): GCVE-0-2014-2523
GCVE (VulDB): GCVE-100-12669

OVAL: 🔍

X-Force: 91910 - Linux Kernel /netfilter/nf_conntrack_proto_dccp.c file code execution, High Risk
SecurityFocus: 66279 - Linux Kernel Multiple Function Remote Memory Corruption Vulnerabilities
Secunia: 57446 - Linux Kernel DCCP Packets Handling Memory Corruption Vulnerabilities, Highly Critical
SecurityTracker: 1029945
Vulnerability Center: 43681 - Linux Kernel Remote Code Execution due to Memory Corruption in Netfilter via Crafted DCCP Packets, Critical

See also: 🔍

Entryinfo

Created: 03/21/2014 12:22
Updated: 05/08/2026 23:38
Changes: 03/21/2014 12:22 (82), 05/23/2017 08:55 (5), 06/16/2021 08:29 (3), 06/16/2021 08:31 (1), 05/08/2026 23:38 (15)
Complete: 🔍
Cache ID: 216::103

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