CVE-2024-6519
개요
A use-after-free vulnerability was found in the QEMU LSI53C895A SCSI Host Bus Adapter emulation. This issue can lead to a crash or VM escape.
내용
The qemu-kvm packages shipped in Red Hat Enterprise Linux and RHEL Advanced Virtualization are not affected by this issue because the LSI53C895A device is not enabled.
Additionally, LSI53C895A emulation is not used for virtualized production services. Therefore, it is unlikely to be used in association with untrusted guests.
CVSS (Common Vulnerability Scoring System) 점수 세부 사항
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
다음의 CVSS 지표 및 점수는 예비 정보로 검토 대상입니다.
CVSS v3 점수 분석
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| 기본 점수 | 8.2 | N/A | N/A |
| 공격 벡터 | Local | N/A | N/A |
| 공격 복잡성 | Low | N/A | N/A |
| 필요한 권한 | High | N/A | N/A |
| 사용자 상호 작용 | None | N/A | N/A |
| 범위 | Changed | N/A | N/A |
| 기밀성 | High | N/A | N/A |
| 무결성에 미치는 영향 | High | N/A | N/A |
| 가용성에 미치는 영향 | High | N/A | N/A |
벡터
Red Hat: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
취약점 이해 (CWE)
Integrity
Technical Impact: Modify Memory
The use of previously freed memory may corrupt valid data, if the memory area in question has been allocated and used properly elsewhere.
Availability
Technical Impact: DoS: Crash, Exit, or Restart
If chunk consolidation occurs after the use of previously freed data, the process may crash when invalid data is used as chunk information.
Confidentiality
Technical Impact: Read Memory
Read operations on freed memory can sometimes leak sensitive information instead of causing a crash
Integrity,Confidentiality,Availability
Technical Impact: Execute Unauthorized Code or Commands
If malicious data is entered before chunk consolidation can take place, it may be possible to take advantage of a write-what-where primitive to execute arbitrary code. If the newly allocated data happens to hold a class, in C++ for example, various function pointers may be scattered within the heap data. If one of these function pointers is overwritten with an address to valid shellcode, execution of arbitrary code can be achieved.
감사의 말
Red Hat would like to thank Cyrille Chatras (Trend Micro Zero Day Initiative) for reporting this issue.
