Heap-based buffer overflow in the Certificate Trust List (CTL) Provider service…
Priority HIGH 76CWE-119Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- Complete · Complete · Complete
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA. Impact type from CWE-119 and the CVSS impact.
Summary
Heap-based buffer overflow in the Certificate Trust List (CTL) Provider service (CTLProvider.exe) in Cisco Unified Communications Manager (CUCM) 4.2 before 4.2(3)SR3 and 4.3 before 4.3(1)SR1, and CallManager 4.0 and 4.1 before 4.1(3)SR5c, allows remote attackers to cause a denial of service or execute arbitrary code via a long request.
Why it matters now
EPSS 0.57108 99th 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 |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 9
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:cisco:unified_callmanager:4.0:*:*:*:*:*:*:* | 4.0 | Vulnerable | Cisco |
| cpe:2.3:a:cisco:unified_callmanager:4.1:*:*:*:*:*:*:* | 4.1 | Vulnerable | Cisco |
| cpe:2.3:a:cisco:unified_callmanager:4.1\(3\)sr4:*:*:*:*:*:*:* | 4.1(3)sr4 | Vulnerable | Cisco |
| cpe:2.3:a:cisco:unified_callmanager:4.1\(3\)sr5:*:*:*:*:*:*:* | 4.1(3)sr5 | Vulnerable | Cisco |
| cpe:2.3:a:cisco:unified_callmanager:4.1\(3\)sr5b:*:*:*:*:*:*:* | 4.1(3)sr5b | Vulnerable | Cisco |
| cpe:2.3:a:cisco:unified_communications_manager:4.2:*:*:*:*:*:*:* | 4.2 | Vulnerable | Cisco |
| cpe:2.3:a:cisco:unified_communications_manager:4.2.3sr2:*:*:*:*:*:*:* | 4.2.3sr2 | Vulnerable | Cisco |
| cpe:2.3:a:cisco:unified_communications_manager:4.2.3sr2b:*:*:*:*:*:*:* | 4.2.3sr2b | Vulnerable | Cisco |
| cpe:2.3:a:cisco:unified_communications_manager:4.3:*:*:*:*:*:*:* | 4.3 | Vulnerable | Cisco |
- cpe:2.3:a:cisco:unified_callmanager:4.0:*:*:*:*:*:*:* Versions 4.0 Vulnerable ·Cisco
- cpe:2.3:a:cisco:unified_callmanager:4.1:*:*:*:*:*:*:* Versions 4.1 Vulnerable ·Cisco
- cpe:2.3:a:cisco:unified_callmanager:4.1\(3\)sr4:*:*:*:*:*:*:* Versions 4.1(3)sr4 Vulnerable ·Cisco
- cpe:2.3:a:cisco:unified_callmanager:4.1\(3\)sr5:*:*:*:*:*:*:* Versions 4.1(3)sr5 Vulnerable ·Cisco
- cpe:2.3:a:cisco:unified_callmanager:4.1\(3\)sr5b:*:*:*:*:*:*:* Versions 4.1(3)sr5b Vulnerable ·Cisco
- cpe:2.3:a:cisco:unified_communications_manager:4.2:*:*:*:*:*:*:* Versions 4.2 Vulnerable ·Cisco
- cpe:2.3:a:cisco:unified_communications_manager:4.2.3sr2:*:*:*:*:*:*:* Versions 4.2.3sr2 Vulnerable ·Cisco
- cpe:2.3:a:cisco:unified_communications_manager:4.2.3sr2b:*:*:*:*:*:*:* Versions 4.2.3sr2b Vulnerable ·Cisco
- cpe:2.3:a:cisco:unified_communications_manager:4.3:*:*:*:*:*:*:* Versions 4.3 Vulnerable ·Cisco
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2008-0027
- 2026-10-03 Alias added: GHSA-fr76-mw78-4mfw
References
More Cisco Unified Callmanager vulnerabilities
- TI-2006-05092 Integer overflow in the Real-Time Information Server (RIS) Data Collector service… CVSS 2.0HIGH 10.0
- TI-2006-05091 Off-by-one error in the Certificate Trust List (CTL) Provider service (CTLProvider.exe)… CVSS 2.0HIGH 9.3
- TI-2007-05323 Buffer overflow in the Centralized TFTP File Locator Service in Cisco Unified… CVSS 2.0HIGH 10.0
- TI-2006-05364 Cisco Security Agent (CSA) for Linux 4.5 before 4.5.1.657 and 5.0 before 5.0.0.193, as… CVSS 2.0HIGH 7.8
- TI-2009-02727 Cisco Unified Communications Manager (aka CUCM, formerly CallManager) 5.x before 5.1(3g)… CVSS 2.0HIGH 7.8
- TI-2006-03486 Buffer overflow in Cisco Unified CallManager (CUCM) 5.0(1) through 5.0(3a) allows remote… CVSS 2.0HIGH 7.5
Sources
- CVE-2008-0027 · CVE Program
- CVE-2008-0027 · NVD
- FIRST EPSS
- GHSA-fr76-mw78-4mfw · 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