Fabrice Bellard QEMU net_checksum_calculate memory corruption

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

A vulnerability classified as problematic has been found in Fabrice Bellard QEMU (Virtualization Software) (unknown version). Affected is the function net_checksum_calculate. 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 availability. CVE summarizes:

The net_checksum_calculate function in net/checksum.c in QEMU allows local guest OS users to cause a denial of service (out-of-bounds heap read and crash) via the payload length in a crafted packet.

The weakness was presented 03/03/2016 by Ling Liu with Qihoo 360 as Bug 1296567 as confirmed bug report (Bugzilla). The advisory is available at bugzilla.redhat.com. This vulnerability is traded as CVE-2016-2857 since 03/06/2016. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 90036 (Fedora 22 : xen-4.5.2-9.fc22 (2016-38b20aa50f)), 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 176848 (Debian Security Update for qemu (DLA 1599-1)).

Upgrading eliminates this vulnerability. A possible mitigation has been published 3 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (111313) and Tenable (90036). See 81088, 81711, 82912 and 87559 for similar entries.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
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CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.1

VulDB Base Score: 6.5
VulDB Temp Score: 5.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.5
NVD Vector: 🔍

CVSSv2info

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Exploitinginfo

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

Local: No
Remote: Yes

Availability: 🔍
Status: Unproven

EPSS Score: 🔍
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Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 90036
Nessus Name: Fedora 22 : xen-4.5.2-9.fc22 (2016-38b20aa50f)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 881932
OpenVAS Name: CentOS Update for qemu-guest-agent CESA-2017:0309 centos6
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
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Patch: 362786f14a753d8a5256ef97d7c10ed576d6572b

Timelineinfo

03/03/2016 🔍
03/03/2016 +0 days 🔍
03/06/2016 +3 days 🔍
03/08/2016 +2 days 🔍
03/19/2016 +11 days 🔍
03/21/2016 +2 days 🔍
03/21/2016 +0 days 🔍
04/11/2016 +20 days 🔍
04/17/2016 +6 days 🔍
07/09/2022 +2274 days 🔍

Sourcesinfo

Vendor: bellard.org

Advisory: Bug 1296567
Researcher: Ling Liu
Organization: Qihoo 360
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-2857 (🔍)
X-Force: 111313 - Qemu net_checksum_calculate() function denial of service
Vulnerability Center: 58253 - QEMU Local DoS in net/checksum.c, Low
SecurityFocus: 84130 - QEMU Out of Bounds Denial of Service Vulnerability

See also: 🔍

Entryinfo

Created: 03/08/2016 22:33
Updated: 07/09/2022 10:41
Changes: 03/08/2016 22:33 (76), 02/05/2019 13:15 (15), 07/09/2022 10:41 (5)
Complete: 🔍

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