QEMU up to 6.1.x Block Mirror Layer mirror_wait_on_conflicts null pointer dereference
CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
---|---|---|
3.4 | $0-$5k | 0.00 |
A vulnerability, which was classified as problematic, has been found in QEMU up to 6.1.x (Virtualization Software). This issue affects the function mirror_wait_on_conflicts
of the component Block Mirror Layer. The manipulation with an unknown input leads to a null pointer dereference vulnerability. Using CWE to declare the problem leads to CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. Impacted is availability.
The weakness was shared 01/26/2022. It is possible to read the advisory at bugzilla.redhat.com. The identification of this vulnerability is CVE-2021-4145 since 12/21/2021. Technical details of the vulnerability are known, but there is no available exploit.
Upgrading to version 6.2.0 eliminates this vulnerability.
Product
Type
Name
Version
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: 3.5VulDB Meta Temp Score: 3.4
VulDB Base Score: 3.5
VulDB Temp Score: 3.4
VulDB Vector: 🔍
VulDB Reliability: 🔍
CVSSv2
AV | AC | Au | C | I | A |
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💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
Vector | Complexity | Authentication | Confidentiality | Integrity | Availability |
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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: 🔍
Exploiting
Class: Null pointer dereferenceCWE: CWE-476 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍
Local: No
Remote: Partially
Availability: 🔍
Status: Not defined
EPSS Score: 🔍
EPSS Percentile: 🔍
Price Prediction: 🔍
Current Price Estimation: 🔍
0-Day | unlock | unlock | unlock | unlock |
---|---|---|---|---|
Today | unlock | unlock | unlock | unlock |
Threat Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: UpgradeStatus: 🔍
0-Day Time: 🔍
Upgrade: QEMU 6.2.0
Timeline
12/21/2021 🔍01/26/2022 🔍
01/26/2022 🔍
01/28/2022 🔍
Sources
Product: qemu.orgAdvisory: bugzilla.redhat.com
Status: Confirmed
CVE: CVE-2021-4145 (🔍)
Entry
Created: 01/26/2022 09:51Updated: 01/28/2022 18:48
Changes: 01/26/2022 09:51 (40), 01/28/2022 18:41 (1), 01/28/2022 18:48 (1)
Complete: 🔍
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