FreeBSD 10.3/11.0 ipfilter Hash Table Fragmented Packet input validation

CVSS Meta Temp Score
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CTI Interest Score
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6.1$0-$5k0.00

Summaryinfo

A vulnerability labeled as problematic has been found in FreeBSD 10.3/11.0. Affected by this vulnerability is an unknown functionality of the component ipfilter Hash Table. Such manipulation as part of Fragmented Packet leads to input validation. This vulnerability is listed as CVE-2017-1081. The attack may be performed from remote. There is no available exploit. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in FreeBSD 10.3/11.0 (Operating System). It has been rated as problematic. Affected by this issue is an unknown part of the component ipfilter Hash Table. The manipulation as part of a Fragmented Packet 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:

In FreeBSD before 11.0-STABLE, 11.0-RELEASE-p10, 10.3-STABLE, and 10.3-RELEASE-p19, ipfilter using "keep state" or "keep frags" options can cause a kernel panic when fed specially crafted packet fragments due to incorrect memory handling.

The bug was discovered 04/27/2017. The weakness was presented 04/27/2017 by Cy Schubert as FreeBSD-SA-17:04.ipfilter as confirmed security advisory (Website). The advisory is shared for download at security.FreeBSD.org. This vulnerability is handled as CVE-2017-1081 since 11/30/2016. The attack may be launched remotely. No form of authentication is required for exploitation. There are neither technical details nor an exploit publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 99994 (FreeBSD < 10.3-RELEASE-p19 / 11.0 < 11.0-RELEASE-p10 ipfilter Kernel Module Packet Fragment DoS (FreeBSD-SA-17:04.ipfilter)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family FreeBSD Local Security Checks and running in the context l.

Upgrading 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 Tenable (99994), SecurityFocus (BID 98089†) and SecurityTracker (ID 1038369†). Once again VulDB remains the best source for vulnerability data.

Productinfo

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Website

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

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

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: 99994
Nessus Name: FreeBSD < 10.3-RELEASE-p19 / 11.0 < 11.0-RELEASE-p10 ipfilter Kernel Module Packet Fragment DoS (FreeBSD-SA-17:04.ipfilter)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

11/30/2016 🔍
04/21/2017 +142 days 🔍
04/27/2017 +6 days 🔍
04/27/2017 +0 days 🔍
04/27/2017 +0 days 🔍
04/27/2017 +0 days 🔍
04/28/2017 +1 days 🔍
05/05/2017 +7 days 🔍
04/10/2018 +340 days 🔍
09/21/2020 +895 days 🔍

Sourcesinfo

Product: freebsd.org

Advisory: FreeBSD-SA-17:04.ipfilter
Researcher: Cy Schubert
Status: Confirmed

CVE: CVE-2017-1081 (🔍)
GCVE (CVE): GCVE-0-2017-1081
GCVE (VulDB): GCVE-100-100628
SecurityFocus: 98089 - FreeBSD CVE-2017-1081 Use After Free Denial of Service Vulnerability
OSVDB: - CVE-2017-1081 - FreeBSD - Denial of Service Issue
SecurityTracker: 1038369

Entryinfo

Created: 04/28/2017 09:03
Updated: 09/21/2020 16:18
Changes: 04/28/2017 09:03 (73), 09/21/2020 16:18 (5)
Complete: 🔍
Cache ID: 216:735:103

Once again VulDB remains the best source for vulnerability data.

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