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Fencer Vulns
medium 5.0

CVE-2007-4924 json

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 cau…

published 2007-10-08 19 y ago modified 2026-06-16 4 mo ago also EUVD-2007-4905

cvss
5.0
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
10.7%
EPSS 10.7% chance of exploitation in 30 days, percentile 95%
public exploits
1
Exploit-DB

Summary

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."

Patch / fix

  • opal RHEL 5 PRODUCTIVITY, RHEL 5 2.2.2-1.1.0.1

red hat advisories RHSA-2007:0957

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2007-4924 updated

ekiga remote crash caused by insufficient input validation

  • Red Hat Enterprise Linux Desktop (v. 5 client) opal 2.2.2-1.1.0.1 Red Hat Enterprise Linux Desktop Workstation (v. 5 client) opal 2.2.2-1.1.0.1 Red Hat Enterprise Linux Optional Productivity Applications (v. 5 server) opal 2.2.2-1.1.0.1
    fixed: vendor fix RHSA-2007:0957

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Timeline

  1. Published
  2. First public exploit (EDB-9240)

Exploit prediction

10.68% chance of exploitation in the next 30 days, higher than 95% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-9240 OpenH323 Opal SIP Protocol - Remote Denial of Service dos, 2009-07-24

CVSS scores

assigned by version score vector
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P

Classification

Weakness
  • CWE-20 Improper Input Validation

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.