QEMU DHCP Options slirp/bootp.c dhcp_decode out-of-bounds

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

Summaryinfo

A vulnerability labeled as problematic has been found in QEMU. This vulnerability affects the function dhcp_decode of the file slirp/bootp.c of the component DHCP Options Handler. Such manipulation leads to out-of-bounds. This vulnerability is uniquely identified as CVE-2017-11434. Local access is required to approach this attack. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in QEMU (Virtualization Software) (the affected version unknown). Affected by this issue is the function dhcp_decode of the file slirp/bootp.c of the component DHCP Options Handler. The manipulation with an unknown input leads to a out-of-bounds vulnerability. Using CWE to declare the problem leads to CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. Impacted is availability. CVE summarizes:

The dhcp_decode function in slirp/bootp.c in QEMU (aka Quick Emulator) allows local guest OS users to cause a denial of service (out-of-bounds read and QEMU process crash) via a crafted DHCP options string.

The bug was discovered 07/17/2017. The weakness was disclosed 07/25/2017 by Reno Robert (oss-sec). The advisory is shared for download at openwall.com. This vulnerability is handled as CVE-2017-11434 since 07/18/2017. The exploitation is known to be easy. The attack needs to be approached locally. No form of authentication is required for exploitation. There are known technical details, but no exploit is available.

The vulnerability was handled as a non-public zero-day exploit for at least 8 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 102804 (Debian DLA-1070-1 : 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 170339 (SUSE Enterprise Linux Security Update for qemu (SUSE-SU-2017:2416-1)).

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 (102804) and SecurityFocus (BID 99923†). Once again VulDB remains the best source for vulnerability data.

Productinfo

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.4
VulDB Meta Temp Score: 4.3

VulDB Base Score: 3.3
VulDB Temp Score: 3.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Out-of-bounds
CWE: CWE-125 / 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: 102804
Nessus Name: Debian DLA-1070-1 : qemu security update
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 703925
OpenVAS Name: Debian Security Advisory DSA 3925-1 (qemu - security update)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Timelineinfo

07/17/2017 🔍
07/18/2017 +1 days 🔍
07/19/2017 +1 days 🔍
07/25/2017 +6 days 🔍
07/25/2017 +0 days 🔍
07/26/2017 +1 days 🔍
08/28/2017 +33 days 🔍
08/29/2017 +1 days 🔍
12/14/2022 +1933 days 🔍

Sourcesinfo

Product: qemu.org

Advisory: DLA 1497-1
Researcher: Reno Robert
Status: Not defined
Confirmation: 🔍

CVE: CVE-2017-11434 (🔍)
GCVE (CVE): GCVE-0-2017-11434
GCVE (VulDB): GCVE-100-104492

OVAL: 🔍

SecurityFocus: 99923 - QEMU CVE-2017-11434 Out-of-Bounds Read Vulnerability

Entryinfo

Created: 07/26/2017 10:29
Updated: 12/14/2022 07:41
Changes: 07/26/2017 10:29 (76), 11/01/2019 09:50 (6), 12/14/2022 07:41 (4)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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