CVE-2020-4433

Certain IBM Aspera applications are vulnerable to a stack-based buffer overflow, caused by improper bounds checking. This could allow a remote attacker with intimate knowledge of the server to execute arbitrary code on the system with the privileges of root or cause server to crash. IBM X-Force ID: 180814.

Published: 2020-06-10 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2020-4433 is rated Moderate Risk (55.7/100): CVSS High severity, with medium exploitation likelihood (EPSS 3.74%). Review affected assets and schedule remediation.

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

Exploit prediction scoring system (EPSS) score for CVE-2020-4433

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 2026-01-09 9.24% 3.74% -5.51%
2 2025-07-04 3.48% 9.24% +5.77%
3 2025-03-30 — 3.48% —

Full EPSS history (19 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2020-4433

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:H/PR:L/UI:N/S:U/C:H/I:H/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:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
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:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.6 5.9 [email protected]
7.5 3.0 HIGH
CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/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:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
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:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.6 5.9 [email protected]
9.3 2.0 HIGH
AV:N/AC:M/Au:N/C:C/I:C/A:C Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 8.6 10.0 [email protected]

Weakness enumeration for CVE-2020-4433

Affected software / configurations for CVE-2020-4433

Vendor Product Version Raw CPE
ibm aspera_application_platform_on_demand <= 3.7.4 cpe:2.3:a:ibm:aspera_application_platform_on_demand:*:*:*:*:*:*:*:*
ibm aspera_faspex_on_demand <= 3.7.4 cpe:2.3:a:ibm:aspera_faspex_on_demand:*:*:*:*:*:*:*:*
ibm aspera_high-speed_transfer_endpoint <= 3.9.3 cpe:2.3:a:ibm:aspera_high-speed_transfer_endpoint:*:*:*:*:*:*:*:*
ibm aspera_high-speed_transfer_server <= 3.9.3 cpe:2.3:a:ibm:aspera_high-speed_transfer_server:*:*:*:*:*:*:*:*
ibm aspera_high-speed_transfer_server_for_cloud_pak_for_integration <= 3.9.10 cpe:2.3:a:ibm:aspera_high-speed_transfer_server_for_cloud_pak_for_integration:*:*:*:*:*:*:*:*
ibm aspera_proxy_server <= 1.4.3 cpe:2.3:a:ibm:aspera_proxy_server:*:*:*:*:*:*:*:*
ibm aspera_server_on_demand <= 3.7.4 cpe:2.3:a:ibm:aspera_server_on_demand:*:*:*:*:*:*:*:*
ibm aspera_shares_on_demand <= 3.7.4 cpe:2.3:a:ibm:aspera_shares_on_demand:*:*:*:*:*:*:*:*
ibm aspera_streaming <= 3.9.3 cpe:2.3:a:ibm:aspera_streaming:*:*:*:*:*:*:*:*
ibm aspera_transfer_cluster_manager <= 1.3.1 cpe:2.3:a:ibm:aspera_transfer_cluster_manager:*:*:*:*:*:*:*:*

References for CVE-2020-4433

cvelogic Threat Intelligence