CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
---|---|---|
5.2 | $0-$5k | 0.00 |
A vulnerability classified as critical was found in QEMU (Virtualization Software) (the affected version unknown). Affected by this vulnerability is an unknown part of the component IOReadHandler. The manipulation with an unknown input leads to a integer overflow vulnerability. The CWE definition for the vulnerability is CWE-190. The product performs a calculation that can produce an integer overflow or wraparound, when the logic assumes that the resulting value will always be larger than the original value. This can introduce other weaknesses when the calculation is used for resource management or execution control. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:
Qemu has integer overflows because IOReadHandler and its associated functions use a signed integer data type for a size value.
The bug was discovered 10/17/2018. The weakness was released 10/19/2018 by Arash Tohidi (oss-sec). The advisory is shared at openwall.com. This vulnerability is known as CVE-2018-18438 since 10/17/2018. The exploitation appears to be easy. An attack has to be approached locally. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available.
The vulnerability was handled as a non-public zero-day exploit for at least 2 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 119456 (SUSE SLES11 Security Update : kvm (SUSE-SU-2018:3987-1)), 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 171739 (SUSE Enterprise Linux Security Update for kvm (SUSE-SU-2018:3975-1)).
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 vulnerability database at Tenable (119456).
Product
Type
Name
License
CPE 2.3
CPE 2.2
CVSSv4
VulDB CVSS-B Score: 🔍VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍
CVSSv3
VulDB Meta Base Score: 5.4VulDB Meta Temp Score: 5.3
VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍
NVD Base Score: 5.5
NVD Vector: 🔍
CVSSv2
AV | AC | Au | C | I | A |
---|---|---|---|---|---|
💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
Vector | Complexity | Authentication | Confidentiality | Integrity | Availability |
---|---|---|---|---|---|
unlock | unlock | unlock | unlock | unlock | unlock |
unlock | unlock | unlock | unlock | unlock | unlock |
unlock | unlock | unlock | unlock | unlock | unlock |
VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍
NVD Base Score: 🔍
Exploiting
Class: Integer overflowCWE: CWE-190 / CWE-189
ATT&CK: Unknown
Local: Yes
Remote: No
Availability: 🔍
Status: Not defined
EPSS Score: 🔍
EPSS Percentile: 🔍
Price Prediction: 🔍
Current Price Estimation: 🔍
0-Day | unlock | unlock | unlock | unlock |
---|---|---|---|---|
Today | unlock | unlock | unlock | unlock |
Nessus ID: 119456
Nessus Name: SUSE SLES11 Security Update : kvm (SUSE-SU-2018:3987-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Qualys ID: 🔍
Qualys Name: 🔍
Threat Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: UpgradeStatus: 🔍
Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍
Timeline
10/17/2018 🔍10/17/2018 🔍
10/19/2018 🔍
10/19/2018 🔍
10/20/2018 🔍
11/10/2018 🔍
12/05/2018 🔍
12/06/2018 🔍
04/05/2020 🔍
Sources
Product: qemu.orgAdvisory: openwall.com
Researcher: Arash Tohidi
Status: Confirmed
CVE: CVE-2018-18438 (🔍)
SecurityFocus: 105953 - QEMU CVE-2018-18438 Local Integer Overflow Vulnerability
Entry
Created: 10/20/2018 09:06Updated: 04/05/2020 18:56
Changes: 10/20/2018 09:06 (68), 04/05/2020 18:56 (6)
Complete: 🔍
No comments yet. Languages: en.
Please log in to comment.