| Package | Affected versions | Patched versions |
|---|---|---|
| ekiga | ≤ 2.0.9 | |
| openh323 | ≤ 2.2.3 |
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."
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