QEMU pvrdma_dev_ring.c input validation

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.4$5k-$25k0.00

Summaryinfo

A vulnerability was found in QEMU. It has been declared as problematic. Affected by this vulnerability is an unknown functionality of the file hw/rdma/vmw/pvrdma_dev_ring.c. Executing a manipulation can lead to input validation. This vulnerability is registered as CVE-2018-20216. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability classified as problematic was found in QEMU (Virtualization Software) (version now known). This vulnerability affects some unknown processing of the file hw/rdma/vmw/pvrdma_dev_ring.c. The manipulation with an unknown input leads to a input validation vulnerability. The CWE definition for the vulnerability is CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. As an impact it is known to affect availability. CVE summarizes:

QEMU can have an infinite loop in hw/rdma/vmw/pvrdma_dev_ring.c because return values are not checked (and -1 is mishandled).

The bug was discovered 12/19/2018. The weakness was published 12/20/2018 by Li Qiang (oss-sec). The advisory is shared for download at openwall.com. This vulnerability was named CVE-2018-20216 since 12/18/2018. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 10/26/2024).

The vulnerability was handled as a non-public zero-day exploit for at least 1 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 209571 (Oracle Linux 8 : virt:kvm_utils3 (ELSA-2024-12792)), which helps to determine the existence of the flaw in a target environment. The commercial vulnerability scanner Qualys is able to test this issue with plugin 157908 (Oracle Enterprise Linux Security Update for qemu (ELSA-2019-4518)).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at Tenable (209571) and SecurityFocus (BID 106291†). Similar entries are available at VDB-127948, VDB-128256, VDB-128257 and VDB-128258. 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: 6.4
VulDB Meta Temp Score: 6.4

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

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
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: 209571
Nessus Name: Oracle Linux 8 : virt:kvm_utils3 (ELSA-2024-12792)

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

12/18/2018 🔍
12/19/2018 +1 days 🔍
12/19/2018 +0 days 🔍
12/20/2018 +1 days 🔍
12/20/2018 +0 days 🔍
12/21/2018 +1 days 🔍
10/26/2024 +2136 days 🔍

Sourcesinfo

Product: qemu.org

Advisory: USN-3923-1
Researcher: Li Qiang
Status: Confirmed

CVE: CVE-2018-20216 (🔍)
GCVE (CVE): GCVE-0-2018-20216
GCVE (VulDB): GCVE-100-128260
SecurityFocus: 106291 - QEMU 'hw/rdma/vmw/pvrdma_dev_ring.c' Denial of Service Vulnerability

See also: 🔍

Entryinfo

Created: 12/21/2018 13:05
Updated: 10/26/2024 21:14
Changes: 12/21/2018 13:05 (60), 04/23/2020 09:26 (4), 06/20/2023 14:20 (3), 10/26/2024 21:14 (17)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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