CVE-2015-3247
개요
A race condition flaw, leading to a heap-based memory corruption, was found in spice's worker_update_monitors_config() function, which runs under the QEMU-KVM context on the host. A user in a guest could leverage this flaw to crash the host QEMU-KVM process or, possibly, execute arbitrary code with the privileges of the host QEMU-KVM process.
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).
CVSS v2 점수 분석
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| 기본 점수 | 7.7 | 6.9 | N/A |
| 공격 벡터 | Adjacent Network | Local | N/A |
| 액세스 복잡성 | Low | Medium | N/A |
| 인증 | Single | None | N/A |
| 기밀성에 미치는 영향 | Complete | Complete | N/A |
| 무결성에 미치는 영향 | Complete | Complete | N/A |
| 가용성에 미치는 영향 | Complete | Complete | N/A |
벡터
Red Hat: AV:A/AC:L/Au:S/C:C/I:C/A:C
NVD: AV:L/AC:M/Au:N/C:C/I:C/A:C
취약점 이해 (CWE)
Availability
Technical Impact: DoS: Resource Consumption (CPU); DoS: Resource Consumption (Memory); DoS: Resource Consumption (Other)
When a race condition makes it possible to bypass a resource cleanup routine or trigger multiple initialization routines, it may lead to resource exhaustion.
Availability
Technical Impact: DoS: Crash, Exit, or Restart; DoS: Instability
When a race condition allows multiple control flows to access a resource simultaneously, it might lead the product(s) into unexpected states, possibly resulting in a crash.
Confidentiality,Integrity
Technical Impact: Read Files or Directories; Read Application Data
When a race condition is combined with predictable resource names and loose permissions, it may be possible for an attacker to overwrite or access confidential data (CWE-59).
Access Control
Technical Impact: Execute Unauthorized Code or Commands; Gain Privileges or Assume Identity; Bypass Protection Mechanism
This can have security implications when the expected synchronization is in security-critical code, such as recording whether a user is authenticated or modifying important state information that should not be influenced by an outsider.
감사의 말
This issue was discovered by Frediano Ziglio (Red Hat).
