Out-of-bounds write in IBM Sterling Connect:Direct for UNIX
Priority LOW 34CWE-787Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-787 and the CVSS impact.
Summary
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 obtain root provileges. IBM X-Force ID: 184578.
Why it matters now
EPSS 0.0034 27th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| IBM | Sterling Connect:Direct for UNIX | 4.2.0; 4.3.0 | — | No fix listed | CNA |
| IBM | Connect:Direct for UNIX | 6.1.0; 6.0.0 | — | No fix listed | CNA |
- Sterling Connect:Direct for UNIX VendorIBM Affected 4.2.0; 4.3.0 Fixed in — No fix listed CNA
- Connect:Direct for UNIX VendorIBM Affected 6.1.0; 6.0.0 Fixed in — No fix listed CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:ibm:connect\:direct:6.0.0:*:*:*:*:unix:*:* | direct 6.0.0 | Vulnerable | IBM |
| cpe:2.3:a:ibm:connect\:direct:6.1.0:*:*:*:*:unix:*:* | direct 6.1.0 | Vulnerable | IBM |
| cpe:2.3:a:ibm:sterling_connect\:direct:4.2.0:*:*:*:*:unix:*:* | direct 4.2.0 | Vulnerable | IBM |
| cpe:2.3:a:ibm:sterling_connect\:direct:4.3.0:*:*:*:*:unix:*:* | direct 4.3.0 | Vulnerable | IBM |
- cpe:2.3:a:ibm:connect\:direct:6.0.0:*:*:*:*:unix:*:* Versions direct 6.0.0 Vulnerable ·IBM
- cpe:2.3:a:ibm:connect\:direct:6.1.0:*:*:*:*:unix:*:* Versions direct 6.1.0 Vulnerable ·IBM
- cpe:2.3:a:ibm:sterling_connect\:direct:4.2.0:*:*:*:*:unix:*:* Versions direct 4.2.0 Vulnerable ·IBM
- cpe:2.3:a:ibm:sterling_connect\:direct:4.3.0:*:*:*:*:unix:*:* Versions direct 4.3.0 Vulnerable ·IBM
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2020-4587
- 2026-10-03 Alias added: GHSA-qvjf-c3cc-2mpj
References
More IBM Connect vulnerabilities
- TI-2020-04027 Improper authentication in IBM Sterling Connect:Direct for UNIX CVSS 3.1CRITICAL 9.8
Sources
- CVE-2020-4587 · CVE Program
- CVE-2020-4587 · NVD
- FIRST EPSS
- GHSA-qvjf-c3cc-2mpj · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences