CVE-2021-43612
Description
An out-of-bounds read vulnerability is present in lldpd. An attacker on the same network as the vulnerable system may use this vulnerability to leak memory data from the application or crash it by sending shorter SONMP packets than what is expected.
Statement
The Impact of this flaw has been set to Moderate, as it generally results in leak of data or, in some particular circumstances, in a crash of the application. Moreover, it requires an attacker to be adjacent to the vulnerable system.
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).
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 7.3 | 7.5 | N/A |
| Attack Vector | Adjacent Network | Network | N/A |
| Attack Complexity | Low | Low | N/A |
| Privileges Required | Low | None | N/A |
| User Interaction | None | None | N/A |
| Scope | Unchanged | Unchanged | N/A |
| Confidentiality | High | None | N/A |
| Integrity Impact | None | None | N/A |
| Availability Impact | High | High | N/A |
Vector
Red Hat: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
NVD: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Red Hat CVSS v3 Score Explanation
Attack Vector is set to Adjacent (AV:A) as lldpd involves link layer protocols and require an attacker to be adjacent to the victim system; Confidentiality is set to High (C:H) because the values read out-of-bounds could be used to construct other packets that an attacker may read; Availability set to High (A:H) as we could not exclude the out-of-bounds read would result in a crash of lldpd when reading invalid memory.
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