Linux Kernel 4.19-rc1 net/ipv4/ip_fragment.c ip_frag_reasm input validation

CVSS Meta Temp Score
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CTI Interest Score
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6.6$0-$5k0.00

Summaryinfo

A vulnerability classified as critical was found in Linux Kernel 4.19-rc1. The impacted element is the function ip_frag_reasm of the file net/ipv4/ip_fragment.c. Such manipulation leads to input validation. This vulnerability is listed as CVE-2018-14641. The attack may be performed from remote. There is no available exploit. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Linux Kernel 4.19-rc1 (Operating System). It has been rated as critical. Affected by this issue is the function ip_frag_reasm of the file net/ipv4/ip_fragment.c. The manipulation with an unknown input leads to a input validation vulnerability. Using CWE to declare the problem leads to 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. Impacted is availability. CVE summarizes:

A security flaw was found in the ip_frag_reasm() function in net/ipv4/ip_fragment.c in the Linux kernel from 4.19-rc1 to 4.19-rc3 inclusive, which can cause a later system crash in ip_do_fragment(). With certain non-default, but non-rare, configuration of a victim host, an attacker can trigger this crash remotely, thus leading to a remote denial-of-service.

The bug was discovered 09/18/2018. The weakness was presented 09/18/2018 as not defined mailinglist post (oss-sec). The advisory is shared for download at seclists.org. This vulnerability is handled as CVE-2018-14641 since 07/27/2018. The attack may be launched remotely. No form of authentication is required for exploitation. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 118513 (RHEL 7 : kernel-alt (RHSA-2018:2948) (Spectre)), 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 351448 (Amazon Linux Security Advisory for kernel: ALAC2012-2018-014).

Upgrading eliminates this vulnerability. A possible mitigation has been published 2 months after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (118513) and SecurityFocus (BID 104917†). See VDB-109193, VDB-115503, VDB-122243 and VDB-122244 for similar entries. VulDB is the best source for vulnerability data and more expert information about this specific topic.

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CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.7
VulDB Meta Temp Score: 6.6

VulDB Base Score: 7.5
VulDB Temp Score: 7.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.9
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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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: 118513
Nessus Name: RHEL 7 : kernel-alt (RHSA-2018:2948) (Spectre)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Patch: git.kernel.org

Timelineinfo

07/27/2018 🔍
07/27/2018 +0 days 🔍
09/18/2018 +52 days 🔍
09/18/2018 +0 days 🔍
09/18/2018 +0 days 🔍
09/19/2018 +1 days 🔍
10/30/2018 +41 days 🔍
10/31/2018 +1 days 🔍
05/17/2023 +1659 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: RHSA-2018:2948
Status: Not defined
Confirmation: 🔍

CVE: CVE-2018-14641 (🔍)
GCVE (CVE): GCVE-0-2018-14641
GCVE (VulDB): GCVE-100-124208
SecurityFocus: 104917 - Linux Kernel Multiple Denial of Service Vulnerabilities

See also: 🔍

Entryinfo

Created: 09/19/2018 06:39
Updated: 05/17/2023 07:49
Changes: 09/19/2018 06:39 (75), 03/24/2020 22:26 (5), 05/17/2023 07:49 (5)
Complete: 🔍
Cache ID: 216::103

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