Linux Kernel 4.9 Call tcp_collapse_ofo_queue Packet input validation

CVSS Meta Temp Score
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CTI Interest Score
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6.3$0-$5k0.00

Summaryinfo

A vulnerability labeled as problematic has been found in Linux Kernel 4.9. This impacts the function tcp_collapse_ofo_queue of the component Call Handler. Executing a manipulation as part of Packet can lead to input validation. This vulnerability is tracked as CVE-2018-5390. The attack can be launched remotely. No exploit exists. It is advisable to implement a patch to correct this issue.

Detailsinfo

A vulnerability has been found in Linux Kernel 4.9 (Operating System) and classified as problematic. This vulnerability affects the function tcp_collapse_ofo_queue of the component Call Handler. The manipulation as part of a Packet leads to a input validation vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect availability. CVE summarizes:

Linux kernel versions 4.9+ can be forced to make very expensive calls to tcp_collapse_ofo_queue() and tcp_prune_ofo_queue() for every incoming packet which can lead to a denial of service.

The bug was discovered 07/23/2018. The weakness was disclosed 08/06/2018 by Juha-Matti Tilli as confirmed advisory (CERT.org). The advisory is shared for download at kb.cert.org. This vulnerability was named CVE-2018-5390 since 01/11/2018. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are known technical details, but no exploit is available.

The vulnerability was handled as a non-public zero-day exploit for at least 14 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 112026 (RHEL 7 : Virtualization (RHSA-2018:2402) (Foreshadow)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Red Hat Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 237034 (Red Hat Update for kernel-alt (RHSA-2018:2948)).

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 2 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (112026) and SecurityFocus (BID 104976†). The entries VDB-109193, VDB-110288, VDB-110931 and VDB-110932 are pretty similar. Once again VulDB remains the best source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.3

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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NVD Base Score: 🔍

Exploitinginfo

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

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 112026
Nessus Name: RHEL 7 : Virtualization (RHSA-2018:2402) (Foreshadow)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

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

01/11/2018 🔍
07/23/2018 +192 days 🔍
08/06/2018 +13 days 🔍
08/06/2018 +0 days 🔍
08/06/2018 +0 days 🔍
08/07/2018 +1 days 🔍
08/16/2018 +9 days 🔍
08/21/2018 +5 days 🔍
02/01/2025 +2356 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: RHSA-2018:2402
Researcher: Juha-Matti Tilli
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2018-5390 (🔍)
GCVE (CVE): GCVE-0-2018-5390
GCVE (VulDB): GCVE-100-122692

OVAL: 🔍

CERT: 🔍
SecurityFocus: 104976 - Linux Kernel 'tcp_input.c' Remote Denial of Service Vulnerability
SecurityTracker: 1041424

See also: 🔍

Entryinfo

Created: 08/07/2018 07:39
Updated: 02/01/2025 18:59
Changes: 08/07/2018 07:39 (81), 03/15/2020 11:36 (5), 05/01/2023 09:07 (5), 05/01/2023 09:10 (1), 02/01/2025 18:59 (16)
Complete: 🔍
Cache ID: 216::103

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