CVE-2015-3294
Description
From CVE.org
The tcp_request function in Dnsmasq before 2.73rc4 does not properly handle the return value of the setup_reply function, which allows remote attackers to read process memory and cause a denial of service (out-of-bounds read and crash) via a malformed DNS request.
Common Vulnerability Scoring System (CVSS) Score Details
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).
The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v2 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 4.3 | 6.4 | N/A |
| Attack Vector | Network | Network | N/A |
| Access Complexity | Medium | Low | N/A |
| Authentication | None | None | N/A |
| Confidentiality Impact | None | Partial | N/A |
| Integrity Impact | None | None | N/A |
| Availability Impact | Partial | Partial | N/A |
Vector
Red Hat: AV:N/AC:M/Au:N/C:N/I:N/A:P
NVD: AV:N/AC:L/Au:N/C:P/I:N/A:P
Understanding the Weakness (CWE)
Availability,Integrity
Technical Impact: Unexpected State; Varies by Context; DoS: Crash, Exit, or Restart
The product could be prevented from detecting unexpected states and conditions, placing the product into a state that could lead to a crash or other unintended behaviors.
Access Control
Technical Impact: Bypass Protection Mechanism
If the method/function is used for a protection mechanism, then an unchecked return value could prevent the code from being able to see if the protection mechanism fails. For example, if the program calls a function to drop privileges but does not check the return code to ensure that privileges were successfully dropped, then the program will continue to operate with the higher privileges.
Frequently Asked Questions
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