String handling functions in Mozilla 1.7.3, Firefox 1.0, and Thunderbird before 1.0.2, such as the nsTSubstring_CharT::Replace function, do not properly check the return values of other functions that resize the string, which allows remote attackers to cause a denial of service and possibly execute arbitrary code by forcing an out-of-memory state that causes a reallocation to fail and return a pointer to a fixed address, which leads to heap corruption.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Firefox | Mozilla | 1.0 (including) | 1.0 (including) |
| Mozilla | Mozilla | 1.7.3 (including) | 1.7.3 (including) |
| Thunderbird | Mozilla | 0.1 (including) | 0.1 (including) |
| Thunderbird | Mozilla | 0.2 (including) | 0.2 (including) |
| Thunderbird | Mozilla | 0.3 (including) | 0.3 (including) |
| Thunderbird | Mozilla | 0.4 (including) | 0.4 (including) |
| Thunderbird | Mozilla | 0.5 (including) | 0.5 (including) |
| Thunderbird | Mozilla | 0.6 (including) | 0.6 (including) |
| Thunderbird | Mozilla | 0.7 (including) | 0.7 (including) |
| Thunderbird | Mozilla | 0.8 (including) | 0.8 (including) |
| Thunderbird | Mozilla | 0.9 (including) | 0.9 (including) |
| Thunderbird | Mozilla | 1.0 (including) | 1.0 (including) |