CVE-2024-43410 | Russh has an OOM Denial of Service due to allocation of untrusted amount

Exp

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.

Published: 2024-08-21 Last update: 2026-06-17 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2024-43410 is rated High Exploit Risk (64.7/100): CVSS High severity, with medium exploitation likelihood (EPSS 0.91%). 1 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2024-43410

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2024-43410

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.58% 0.91% +0.33%
2 2025-11-21 0.51% 0.58% +0.08%
3 2025-11-18 — 0.51% —

Full EPSS history (10 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2024-43410

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 3.6 [email protected]

Weakness enumeration for CVE-2024-43410

GitHub Security Advisory for CVE-2024-43410

GHSA-vgvv-x7xg-6cqg · Severity: high · Ecosystem: rust — Russh has an OOM Denial of Service due to allocation of untrusted amount

OS Trackers for CVE-2024-43410

vendor priority summary link
debian unimportant CVE-2024-43410 unimportant priority: Debian including 1 source packages (rust-russh), 2 status rows across 2 suites (forky, sid): resolved 2. https://security-tracker.debian.org/tracker/CVE-2024-43410

Affected software / configurations for CVE-2024-43410

Vendor Product Version Raw CPE
russh_project russh < 0.44.1 cpe:2.3:a:russh_project:russh:*:*:*:*:*:rust:*:*
warpgate_project warpgate < 0.10.2 cpe:2.3:a:warpgate_project:warpgate:*:*:*:*:*:*:*:*

References for CVE-2024-43410

cvelogic Threat Intelligence