CVE-2023-41361
Description
A vulnerability was found in FRRouting stemming from a boundary error in bgpd/bgp_open.c. The issue arises because it fails to check for an excessively large length of the received software version (rcv). This flaw allows a remote attacker to overflow a buffer by sending specially crafted data to the application, leading to a denial of service condition.
Statement
In Red Hat Enterprise Linux 8 and 9, the vulnerable code is not included. It was added much later during the development of the 9.x version of FRR in upstream. The highest version of FRR utilized in RHEL is 8.5. Consequently, none of the FRR versions shipped in RHEL are affected by this vulnerability.
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 v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 5.9 | 9.8 | N/A |
| Attack Vector | Network | Network | N/A |
| Attack Complexity | High | Low | N/A |
| Privileges Required | None | None | N/A |
| User Interaction | None | None | N/A |
| Scope | Unchanged | Unchanged | N/A |
| Confidentiality | None | High | N/A |
| Integrity Impact | None | High | N/A |
| Availability Impact | High | High | N/A |
Vector
Red Hat: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Red Hat CVSS v3 Score Explanation
AC:H, as exploiting this is difficult to do and heavily depends on the application you're targeting.
C:N, I:N, Reading and writing data typically doesn't pose a direct or significant threat, as the FRR packages included in Red Hat Enterprise Linux (RHEL) are compiled with certain stack and heap protections enabled. These measures help mitigate the overall impact, making it more probable that any potential consequences would result in a Denial of Service (DoS) rather than more severe issues.
Understanding the Weakness (CWE)
Integrity,Confidentiality,Availability
Technical Impact: Modify Memory; Execute Unauthorized Code or Commands
Buffer overflows often can be used to execute arbitrary code, which is usually outside the scope of the product's implicit security policy. This can often be used to subvert any other security service.
Availability
Technical Impact: Modify Memory; DoS: Crash, Exit, or Restart; DoS: Resource Consumption (CPU)
Buffer overflows generally lead to crashes. Other attacks leading to lack of availability are possible, including putting the product into an infinite loop.
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