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3.5	$0-$5k	0.00

Summaryinfo

A vulnerability was found in Fabrice Bellard QEMU 2.0.0/2.0.2/2.1.0/2.1.1. It has been rated as problematic. The impacted element is the function sosendto. Performing a manipulation results in null pointer dereference. This vulnerability is reported as CVE-2014-3640. No exploit exists. It is recommended to apply a patch to fix this issue.

Detailsinfo

A vulnerability was found in Fabrice Bellard QEMU 2.0.0/2.0.2/2.1.0/2.1.1 (Virtualization Software). It has been classified as problematic. This affects the function sosendto. The manipulation with an unknown input leads to a null pointer dereference vulnerability. CWE is classifying the issue as CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. This is going to have an impact on availability.

The weakness was disclosed 10/08/2014 by Xavier Mehrenberger and Stephane Duverger with Airbus (Website). It is possible to read the advisory at lists.nongnu.org. This vulnerability is uniquely identified as CVE-2014-3640 since 05/14/2014. The exploitability is told to be easy. Attacking locally is a requirement. No form of authentication is needed for exploitation. Technical details of the vulnerability are known, but there is no available exploit. The reason for this vulnerability is this part of code:

if (so->so_lport != uh->uh_sport ||

The vulnerability scanner Nessus provides a plugin with the ID 81661 (RHEL 7 : qemu-kvm-rhev (RHSA-2015:0624)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Red Hat Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 168775 (SUSE Enterprise Linux Security update for xen (SUSE-SU-2016:1154-1)).

Applying a patch is able to eliminate this problem. The bugfix is ready for download at lists.nongnu.org. A possible mitigation has been published even before and not after the disclosure of the vulnerability. The vulnerability will be addressed with the following lines of code:

if (so == &slirp->udb || so->so_lport != uh->uh_sport ||

The vulnerability is also documented in the databases at X-Force (96930), Tenable (81661), SecurityFocus (BID 70237†) and Vulnerability Center (SBV-46811†). Further details are available at bugzilla.redhat.com. The entries VDB-13216, VDB-13276, VDB-13279 and VDB-13280 are pretty similar. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

• Virtualization Software

Vendor

• Fabrice Bellard

Name

• QEMU

Version

• 2.0.0
• 2.0.2
• 2.1.0
• 2.1.1

License

• open-source

Website

• Vendor: https://bellard.org/

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.0
VulDB Meta Temp Score: 3.5

VulDB Base Score: 4.0
VulDB Temp Score: 3.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Unproven

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 81661
Nessus Name: RHEL 7 : qemu-kvm-rhev (RHSA-2015:0624)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 703044
OpenVAS Name: Debian Security Advisory DSA 3044-1 (qemu-kvm - security update)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: lists.nongnu.org

Timelineinfo

05/14/2014 🔍
07/17/2014 +64 days 🔍
07/17/2014 +0 days 🔍
09/18/2014 +63 days 🔍
10/08/2014 +20 days 🔍
10/13/2014 +5 days 🔍
10/28/2014 +15 days 🔍
11/07/2014 +10 days 🔍
03/06/2015 +119 days 🔍
02/21/2022 +2544 days 🔍

Sourcesinfo

Vendor: bellard.org

Advisory: RHSA-2015:0624
Researcher: Xavier Mehrenberger, Stephane Duverger
Organization: Airbus
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2014-3640 (🔍)
GCVE (CVE): GCVE-0-2014-3640
GCVE (VulDB): GCVE-100-67767

OVAL: 🔍

X-Force: 96930 - QEMU sosendto() denial of service, Low Risk
SecurityFocus: 70237
Vulnerability Center: 46811 - QEMU Local DoS due to NULL Pointer Dereference in the sosendto() Function, Low

Misc.: 🔍
See also: 🔍

Entryinfo

Created: 10/13/2014 10:22
Updated: 02/21/2022 15:45
Changes: 10/13/2014 10:22 (80), 06/10/2017 09:41 (2), 02/21/2022 15:34 (4), 02/21/2022 15:40 (1), 02/21/2022 15:45 (2)
Complete: 🔍
Cache ID: 216:396:103

Discussion

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