Linux Kernel up to 4.12.2 ACPI Table boot.c mp_override_legacy_irq memory corruption

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

Summaryinfo

A vulnerability, which was classified as problematic, was found in Linux Kernel up to 4.12.2. This vulnerability affects the function mp_override_legacy_irq of the file arch/x86/kernel/acpi/boot.c of the component ACPI Table Handler. The manipulation results in memory corruption. This vulnerability is identified as CVE-2017-11473. The attack is only possible with local access. There is not any exploit available. It is advisable to implement a patch to correct this issue.

Detailsinfo

A vulnerability was found in Linux Kernel up to 4.12.2 (Operating System). It has been classified as problematic. Affected is the function mp_override_legacy_irq of the file arch/x86/kernel/acpi/boot.c of the component ACPI Table Handler. The manipulation with an unknown input leads to a memory corruption vulnerability. CWE is classifying the issue as CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

Buffer overflow in the mp_override_legacy_irq() function in arch/x86/kernel/acpi/boot.c in the Linux kernel through 4.12.2 allows local users to gain privileges via a crafted ACPI table.

The bug was discovered 07/18/2017. The weakness was released 07/20/2017 as confirmed git commit (GIT Repository). The advisory is shared for download at git.kernel.org. This vulnerability is traded as CVE-2017-11473 since 07/19/2017. The attack needs to be approached locally. A authentication is required for 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 2 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 101992 (Fedora 25 : kernel (2017-39b5facda0)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 236708 (Red Hat Update for kernel-alt (RHSA-2018:0654)).

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 6 days after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (101992) and SecurityFocus (BID 100010†). Entries connected to this vulnerability are available at VDB-104380, VDB-104462, VDB-110307 and VDB-110308. Once again VulDB remains the best source for vulnerability data.

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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: 6.4

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

NVD Base Score: 7.8
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
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Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 101992
Nessus Name: Fedora 25 : kernel (2017-39b5facda0)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 850584
OpenVAS Name: SuSE Update for Linux Kernel openSUSE-SU-2017:2112-1 (Linux Kernel)
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: 🔍
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Patch: git.kernel.org

Timelineinfo

07/18/2017 🔍
07/19/2017 +1 days 🔍
07/20/2017 +1 days 🔍
07/20/2017 +0 days 🔍
07/20/2017 +0 days 🔍
07/26/2017 +6 days 🔍
07/27/2017 +1 days 🔍
07/28/2017 +1 days 🔍
12/13/2022 +1964 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: FEDORA-2017-39b5facda0
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2017-11473 (🔍)
GCVE (CVE): GCVE-0-2017-11473
GCVE (VulDB): GCVE-100-104316
SecurityFocus: 100010 - Linux kernel CVE-2017-11473 Local Buffer Overflow Vulnerability

See also: 🔍

Entryinfo

Created: 07/20/2017 20:05
Updated: 12/13/2022 12:33
Changes: 07/20/2017 20:05 (81), 10/30/2019 19:52 (5), 12/13/2022 12:26 (4), 12/13/2022 12:33 (1)
Complete: 🔍
Cache ID: 216::103

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