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01 Record

CVE-2020-4587

IBM Sterling Connect:Direct for UNIX 4.2.0, 4.3.0, 6.0.0, and 6.1.0 is vulnerable to a stack based buffer ovreflow, caused by improper bounds checking. A local attacker could manipulate CD UNIX to

HighPUBLISHEDCNA: ibm
CNA base score8.4 CVSS v3.xCVSS:3.0/A:H/PR:N/C:H/AV:L/S:U/I:H/UI:N/AC:L/RC:C/RL:O/E:U
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02 Description

IBM Sterling Connect:Direct for UNIX 4.2.0, 4.3.0, 6.0.0, and 6.1.0 is vulnerable to a stack based buffer ovreflow, caused by improper bounds checking. A local attacker could manipulate CD UNIX to

03 Exploitation and scoring

Exploitation
Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision
Not assessed by CISA
EPSS probability
0.34% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 27.2% of scored records. A rank, not a probability.
NVD base score
7.8 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD analysis status
Modified. NVD last modified this record on 2026-06-17.
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2020-08-24 15:30Z6 YR AGO
Last updated
2024-09-16 23:41Z2 YR AGO
Reserved
2019-12-30
Assigning CNA
ibm
Record state
PUBLISHED
Severity
High (CVSS 8.4)
CNA CVSS vector
CVSS:3.0/A:H/PR:N/C:H/AV:L/S:U/I:H/UI:N/AC:L/RC:C/RL:O/E:U
Weaknesses
Data version
5.1
Document digest
0708111d498f479d27849efcfa1cda8dc7d37d1c2b4c74c086b311998cb9bd4c

05 Affected products

VendorProductVersionsPlatforms
IBMSterling Connect:Direct for UNIX4.2.0, 4.3.0—
IBMConnect:Direct for UNIX6.1.0, 6.0.0—

06 References