CVE-2014-7946
説明
A flaw was found in the Fonts component of the Chromium browser. A remote attacker could exploit this vulnerability by enticing a user to view or process specially crafted font data. Successful exploitation could trigger an out-of-bounds memory read, causing the browser to crash and resulting in a Denial of Service (DoS) or potential disclosure of memory contents.
CVSS (Common Vulnerability Scoring System) のスコアの詳細
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 スコアの内訳
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| ベーススコア | 6.4 | 5 | N/A |
| 攻撃ベクトル | Network | Network | N/A |
| アクセスの複雑さ | Low | Low | N/A |
| 認証 | None | None | N/A |
| 機密性への影響 | Partial | None | N/A |
| 完全性への影響 | Partial | None | N/A |
| 可用性への影響 | None | Partial | N/A |
ベクトル
Red Hat: AV:N/AC:L/Au:N/C:P/I:P/A:N
NVD: AV:N/AC:L/Au:N/C:N/I:N/A:P
脆弱性の原因 (CWE) の理解
Confidentiality
Technical Impact: Read Memory
An attacker could get secret values such as cryptographic keys, PII, memory addresses, or other information that could be used in additional attacks.
Confidentiality
Technical Impact: Bypass Protection Mechanism
Out-of-bounds memory could contain memory addresses or other information that can be used to bypass ASLR and other protection mechanisms in order to improve the reliability of exploiting a separate weakness for code execution.
Availability
Technical Impact: DoS: Crash, Exit, or Restart
An attacker could cause a segmentation fault or crash by causing memory to be read outside of the bounds of the buffer. This is especially likely when the code reads a variable amount of data and assumes that a sentinel exists to stop the read operation, such as a NUL in a string.
Other
Technical Impact: Varies by Context
The read operation could produce other undefined or unexpected results.
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