Fabrice Bellard QEMU arch_init.c input validation

CVSS Meta Temp Score
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CTI Interest Score
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4.3$0-$5k0.00

A vulnerability has been found in Fabrice Bellard QEMU (Virtualization Software) (the affected version is unknown) and classified as problematic. Affected by this vulnerability is an unknown code of the file arch_init.c. The manipulation with an unknown input 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 confidentiality, integrity, and availability. The summary by CVE is:

The host_from_stream_offset function in arch_init.c in QEMU, when loading RAM during migration, allows remote attackers to execute arbitrary code via a crafted (1) offset or (2) length value in savevm data.

The weakness was shared 12/04/2014 (Website). It is possible to read the advisory at bugs.debian.org. This vulnerability is known as CVE-2014-7840 since 10/03/2014. The exploitation appears to be difficult. Attacking locally is a requirement. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 80026 (Ubuntu 10.04 LTS / 12.04 LTS / 14.04 / 14.10 : qemu, qemu-kvm vulnerabilities (USN-2439-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Ubuntu Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 167641 (SUSE Enterprise Linux Security update for kvm and libvirt (SUSE-SU-2015:0357-1)).

Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.qemu.org.

The vulnerability is also documented in the databases at X-Force (99194) and Tenable (80026). Additional details are provided at bugzilla.redhat.com. The entry 68346 is related to this item.

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CPE 2.3info

CPE 2.2info

CVSSv4info

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CVSSv3info

VulDB Meta Base Score: 4.9
VulDB Meta Temp Score: 4.3

VulDB Base Score: 4.9
VulDB Temp Score: 4.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

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

Local: Yes
Remote: No

Availability: 🔍
Status: Unproven

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Nessus ID: 80026
Nessus Name: Ubuntu 10.04 LTS / 12.04 LTS / 14.04 / 14.10 : qemu, qemu-kvm vulnerabilities (USN-2439-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: 0be839a2701369f669532ea5884c15bead1c6e08

Timelineinfo

10/03/2014 🔍
12/04/2014 +62 days 🔍
12/04/2014 +0 days 🔍
12/10/2014 +6 days 🔍
12/12/2014 +2 days 🔍
12/15/2014 +3 days 🔍
12/29/2014 +14 days 🔍
02/27/2022 +2617 days 🔍

Sourcesinfo

Vendor: bellard.org

Advisory: USN-2439-1
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2014-7840 (🔍)
OVAL: 🔍

X-Force: 99194 - QEMU ram load code execution, Low Risk
Vulnerability Center: 47832 - QEMU \x27arch_init.c\x27 Remote Code Execution Vulnerability, High
SecurityFocus: 71477

Misc.: 🔍
See also: 🔍

Entryinfo

Created: 12/10/2014 16:51
Updated: 02/27/2022 17:50
Changes: 12/10/2014 16:51 (41), 04/07/2017 10:42 (23), 02/27/2022 17:36 (4), 02/27/2022 17:43 (7), 02/27/2022 17:50 (2)
Complete: 🔍

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