CVE-2023-24538
Description
A flaw was found in Golang Go. This flaw allows a remote attacker to execute arbitrary code on the system, caused by not properly considering backticks (`) as Javascript string delimiters. By sending a specially crafted request, an attacker execute arbitrary code on the system.
Statement
The described issue involving Go templates and JavaScript template literals poses a moderate severity rather than an important one due to several mitigating factors. Firstly, the vulnerability requires specific conditions to be met: the presence of Go templates within JavaScript template literals. This limits the scope of affected codebases, reducing the likelihood of exploitation. Additionally, the decision to disallow such interactions in future releases of Go indicates a proactive approach to addressing the issue. Furthermore, the affected packages or components within Red Hat Enterprise Linux, such as Conmon, Grafana, and the RHC package, have been assessed and determined not to be impacted due to their specific usage patterns. So the limited scope of affected systems and the absence of exploitation vectors in specific components within Red Hat Enterprise Linux contribute to categorizing the severity of the issue as moderate.
For Red Hat Enterprise Linux,
- Conmon uses go in unit testing, but not functionally in the package. Go is used only in test files, hence, not in the actual code, thus, conmon is not affected.
- The Go templates in Grafana do not contain any javascript. Thus, it is not affected.
- The rhc package do not make use of html/template. Hence, it is also not affected.
Mitigation
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
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 | 9.8 | 9.8 | 9.8 |
| Attack Vector | Network | Network | Network |
| Attack Complexity | Low | Low | Low |
| Privileges Required | None | None | None |
| User Interaction | None | None | None |
| Scope | Unchanged | Unchanged | Unchanged |
| Confidentiality | High | High | High |
| Integrity Impact | High | High | High |
| Availability Impact | High | High | High |
Vector
Red Hat: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
cve.org: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Understanding the Weakness (CWE)
Access Control
Technical Impact: Bypass Protection Mechanism
In some cases, injectable code controls authentication; this may lead to a remote vulnerability.
Access Control
Technical Impact: Gain Privileges or Assume Identity
Injected code can access resources that the attacker is directly prevented from accessing.
Integrity,Confidentiality,Availability
Technical Impact: Execute Unauthorized Code or Commands
When a product allows a user's input to contain code syntax, it might be possible for an attacker to craft the code in such a way that it will alter the intended control flow of the product. As a result, code injection can often result in the execution of arbitrary code. Code injection attacks can also lead to loss of data integrity in nearly all cases, since the control-plane data injected is always incidental to data recall or writing.
Non-Repudiation
Technical Impact: Hide Activities
Often the actions performed by injected control code are unlogged.
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