QEMU slirp/socket.c ifq_so use after free

CVSS Meta Temp Score
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CTI Interest Score
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6.3$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in QEMU. The affected element is the function ifq_so of the file slirp/socket.c. The manipulation leads to use after free. This vulnerability is traded as CVE-2017-13711. It is possible to initiate the attack remotely. There is no exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in QEMU (Virtualization Software) (affected version unknown) and classified as problematic. This issue affects the function ifq_so of the file slirp/socket.c. The manipulation with an unknown input leads to a use after free vulnerability. Using CWE to declare the problem leads to CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. Impacted is availability. The summary by CVE is:

Use-after-free vulnerability in the sofree function in slirp/socket.c in QEMU (aka Quick Emulator) allows attackers to cause a denial of service (QEMU instance crash) by leveraging failure to properly clear ifq_so from pending packets.

The bug was discovered 08/29/2017. The weakness was shared 09/01/2017 (oss-sec). It is possible to read the advisory at openwall.com. The identification of this vulnerability is CVE-2017-13711 since 08/28/2017. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability was handled as a non-public zero-day exploit for at least 3 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 103655 (Debian DSA-3991-1 : qemu - security update), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 157870 (Oracle Enterprise Linux Security Update for qemu (ELSA-2018-4285)).

Upgrading eliminates this vulnerability. A possible mitigation has been published 2 months after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (103655) and SecurityFocus (BID 100534†). The entries VDB-104779, VDB-104780, VDB-105675 and VDB-105918 are related to this item. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.3

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

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 103655
Nessus Name: Debian DSA-3991-1 : qemu - security update
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 53378
OpenVAS Name: Debian Security Advisory DSA 3991-1 (qemu - security update)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Timelineinfo

08/28/2017 🔍
08/29/2017 +1 days 🔍
08/29/2017 +0 days 🔍
09/01/2017 +3 days 🔍
09/01/2017 +0 days 🔍
09/02/2017 +1 days 🔍
10/03/2017 +31 days 🔍
10/04/2017 +1 days 🔍
12/27/2022 +1910 days 🔍

Sourcesinfo

Product: qemu.org

Advisory: RHSA-2018:0816
Researcher: Wjjzhang
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2017-13711 (🔍)
GCVE (CVE): GCVE-0-2017-13711
GCVE (VulDB): GCVE-100-106079

OVAL: 🔍

SecurityFocus: 100534 - QEMU CVE-2017-13711 Denial of Service Vulnerability

See also: 🔍

Entryinfo

Created: 09/02/2017 09:48
Updated: 12/27/2022 15:47
Changes: 09/02/2017 09:48 (70), 11/12/2019 17:24 (11), 01/10/2021 15:33 (3), 12/27/2022 15:47 (3)
Complete: 🔍
Cache ID: 216::103

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