The Open Phone Abstraction Library (opal), as used by (1) Ekiga before 2.0.10 and (2) OpenH323 before 2.2.4, allows remote attackers to cause a denial of service (crash) via an invalid Content-Length header field in Session Initiation Protocol (SIP) packets, which causes a \0 byte to be written to an "attacker-controlled address."
Conclusion & alert: CVE-2007-4924 is rated High Exploit Risk (69.3/100): CVSS Medium severity, with high exploitation likelihood (EPSS 23.13%, 96th percentile). Core evidence: 1 public exploit reference(s) are indexed (Exploit-DB). Mandatory action: 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.
| EDB-ID | Source | Kind | Published | Link |
|---|---|---|---|---|
| 9240 | exploit_db | edb | 2009-07-24 | Exploit-DB ↗ |
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 | 2026-05-27 | 22.46% | 23.13% | +0.67% |
| 2 | 2025-12-23 | 22.66% | 22.46% | -0.20% |
| 3 | 2025-03-30 | — | 22.66% | — |
Full EPSS history (14 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 5.0 | 2.0 | MEDIUM |
|
10.0 | 2.9 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2007-4924 |
ubuntu
|
low | CVE-2007-4924 low priority: Ubuntu including 2 source packages (opal, openh323), 10 status rows across 5 suites (dapper, edgy, feisty, gutsy, upstream): not-affected 5, released 5. | https://ubuntu.com/security/CVE-2007-4924 |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| ekiga | ekiga | <= 2.0.9 | cpe:2.3:a:ekiga:ekiga:*:*:*:*:*:*:*:* |
| openh323_project | openh323 | <= 2.2.3 | cpe:2.3:a:openh323_project:openh323:*:*:*:*:*:*:*:* |