| Summary | MSN Remote "Nudge" DoS |
|---|---|
| Date | 2007-09-27 |
| CVE Number | CVE-2007-4996 |
| Discovered By | Evan Schoenberg |
| Fixed In Release | 2.2.1 |
A remote MSN user that is not on the buddy list can cause a denial of service (crash) by sending a nudge message. The protocol plugin attempts to look up the buddy’s information and accesses an invalid memory location if the user is not on the buddy list. This only affects libpurple version 2.2.0, older versions are not affected.
The nudge functionality in the MSN protocol has been rewritten to avoid an unnecessary lookup of buddy information.