QEMU slirp/mbuf.c m_cat memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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6.8$0-$5k0.00

Summaryinfo

A vulnerability was found in QEMU and classified as critical. This issue affects the function m_cat of the file slirp/mbuf.c. The manipulation results in memory corruption. This vulnerability was named CVE-2018-11806. The attack needs to be approached locally. There is no available exploit. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in QEMU (Virtualization Software) (the affected version is unknown). It has been classified as critical. Affected is the function m_cat of the file slirp/mbuf.c. 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:

m_cat in slirp/mbuf.c in Qemu has a heap-based buffer overflow via incoming fragmented datagrams.

The bug was discovered 06/07/2018. The weakness was presented 06/13/2018 with Zero Day Initiative (oss-sec). The advisory is shared for download at openwall.com. This vulnerability is traded as CVE-2018-11806 since 06/05/2018. The exploitability is told to be easy. The attack needs to be approached locally. The exploitation doesn't require any form of authentication. There are known technical details, but no exploit is available.

The vulnerability was handled as a non-public zero-day exploit for at least 6 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 111348 (SUSE SLED12 / SLES12 Security Update : xen (SUSE-SU-2018:2059-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family SuSE Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 171694 (SUSE Enterprise Linux Security Update for qemu (SUSE-SU-2018:3555-1)).

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 (111348) and SecurityFocus (BID 104400†). See VDB-119790, VDB-120119, VDB-120120 and VDB-120147 for similar entries. Once again VulDB remains the best 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: 6.9
VulDB Meta Temp Score: 6.8

VulDB Base Score: 5.7
VulDB Temp Score: 5.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.2
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

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: 111348
Nessus Name: SUSE SLED12 / SLES12 Security Update : xen (SUSE-SU-2018:2059-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Timelineinfo

06/05/2018 🔍
06/05/2018 +0 days 🔍
06/07/2018 +2 days 🔍
06/13/2018 +5 days 🔍
06/13/2018 +0 days 🔍
06/14/2018 +1 days 🔍
07/25/2018 +41 days 🔍
07/26/2018 +1 days 🔍
03/27/2023 +1705 days 🔍

Sourcesinfo

Product: qemu.org

Advisory: RHSA-2018:2462
Organization: Zero Day Initiative
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2018-11806 (🔍)
GCVE (CVE): GCVE-0-2018-11806
GCVE (VulDB): GCVE-100-119508
SecurityFocus: 104400 - QEMU CVE-2018-11806 Heap Buffer Overflow Vulnerability

See also: 🔍

Entryinfo

Created: 06/14/2018 09:17
Updated: 03/27/2023 10:04
Changes: 06/14/2018 09:17 (74), 02/19/2020 08:55 (6), 03/27/2023 10:04 (4)
Complete: 🔍
Cache ID: 216::103

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