CVE-2024-43410
Russh has an OOM Denial of Service due to allocation of untrusted amount
Severity Score
7.5
*CVSS v3.1
Exploit Likelihood
*EPSS
Affected Versions
*CPE
Public Exploits
0
*Multiple Sources
Exploited in Wild
-
*KEV
Decision
Attend
*SSVC
Descriptions
Russh is a Rust SSH client & server library. Allocating an untrusted amount of memory allows any unauthenticated user to OOM a russh server. An SSH packet consists of a 4-byte big-endian length, followed by a byte stream of this length.
After parsing and potentially decrypting the 4-byte length, russh allocates enough memory for this bytestream, as a performance optimization to avoid reallocations later. But this length is entirely untrusted and can be set to any value by the client, causing this much memory to be allocated, which will cause the process to OOM within a few such requests. This vulnerability is fixed in 0.44.1.
*Credits:
N/A
CVSS Scores
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
* Common Vulnerability Scoring System
SSVC
- Decision:Attend
Exploitation
Automatable
Tech. Impact
* Organization's Worst-case Scenario
Timeline
- 2024-08-12 CVE Reserved
- 2024-08-21 CVE Published
- 2024-08-21 CVE Updated
- 2024-08-22 EPSS Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-770: Allocation of Resources Without Limits or Throttling
CAPEC
References (2)
| URL | Tag | Source |
|---|---|---|
| https://github.com/Eugeny/russh/security/advisories/GHSA-vgvv-x7xg-6cqg | X_refsource_confirm | |
| https://github.com/Eugeny/russh/commit/f660ea3f64b86d11d19e33076012069f02431e55 | X_refsource_misc |
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