Linux Kernel up to 4.20.11 SNMP NAT nf_nat_snmp_basic_main.c array index

CVSS Meta Temp Score
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CTI Interest Score
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6.4$0-$5k0.00

Summaryinfo

A vulnerability was found in Linux Kernel up to 4.20.11. It has been classified as critical. Impacted is an unknown function of the file net/ipv4/netfilter/nf_nat_snmp_basic_main.c of the component SNMP NAT Module. The manipulation leads to array index. This vulnerability is listed as CVE-2019-9162. The attack must be carried out locally. In addition, an exploit is available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Linux Kernel up to 4.20.11 (Operating System). This issue affects an unknown code block of the file net/ipv4/netfilter/nf_nat_snmp_basic_main.c of the component SNMP NAT Module. The manipulation with an unknown input leads to a array index vulnerability. Using CWE to declare the problem leads to CWE-129. The product uses untrusted input when calculating or using an array index, but the product does not validate or incorrectly validates the index to ensure the index references a valid position within the array. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

In the Linux kernel before 4.20.12, net/ipv4/netfilter/nf_nat_snmp_basic_main.c in the SNMP NAT module has insufficient ASN.1 length checks (aka an array index error), making out-of-bounds read and write operations possible, leading to an OOPS or local privilege escalation. This affects snmp_version and snmp_helper.

The bug was discovered 02/06/2019. The weakness was presented 02/25/2019 by Felix Wilhelm (Website). The advisory is shared at securityfocus.com. The identification of this vulnerability is CVE-2019-9162 since 02/25/2019. An attack has to be approached locally. The requirement for exploitation is a simple authentication. Technical details as well as a public exploit are known.

The exploit is available at exploit-db.com. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 19 days. During that time the estimated underground price was around $0-$5k. The commercial vulnerability scanner Qualys is able to test this issue with plugin 277743 (Fedora Security Update for kernel kernel-headers (FEDORA-2019-7462acf8ba)).

Upgrading to version 4.20.12 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at SecurityFocus (BID 106963†). See VDB-120204, VDB-127742, VDB-131067 and VDB-131104 for similar entries. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.3

VulDB Base Score: 5.3
VulDB Temp Score: 4.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Array index
CWE: CWE-129 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kernel 4.20.12
Patch: git.kernel.org

Timelineinfo

02/06/2019 🔍
02/07/2019 +1 days 🔍
02/25/2019 +18 days 🔍
02/25/2019 +0 days 🔍
02/26/2019 +1 days 🔍
12/22/2024 +2126 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: K31864522⛔
Researcher: Felix Wilhelm
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2019-9162 (🔍)
GCVE (CVE): GCVE-0-2019-9162
GCVE (VulDB): GCVE-100-131213
SecurityFocus: 106963 - Linux Kernel CVE-2019-7222 Local Information Disclosure Vulnerability

scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍

Entryinfo

Created: 02/26/2019 08:51
Updated: 12/22/2024 06:55
Changes: 02/26/2019 08:51 (65), 05/12/2020 21:30 (6), 07/19/2023 17:34 (6), 07/19/2023 17:41 (1), 12/22/2024 06:55 (21)
Complete: 🔍
Cache ID: 216::103

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