An integer overflow was found in expat. The issue occurs in storeRawNames() by abusing the m_buffer expansion logic to allow allocations very close to INT_MAX and out-of-bounds heap writes. This flaw can cause a denial of service or potentially arbitrary code execution.
| Platform | Package | Release Date | Advisory |
|---|---|---|---|
| Amazon Linux 1 | expat | 2022-03-08 | ALAS-2022-1570 |
| Amazon Linux 2 - Core | expat | 2022-03-08 | ALAS2-2022-1759 |
| Amazon Linux 2023 | expat | 2023-03-22 | ALAS2023-2023-058 |
| Amazon Linux 2 - Core | thunderbird | 2022-04-27 | ALAS2-2022-1779 |
| Amazon Linux 2 - Core | thunderbird | 2022-03-08 | ALAS2-2022-1759 |
| Score Type | Score | Vector | |
|---|---|---|---|
| Amazon Linux | CVSSv3 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | CVSSv2 | 7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
| NVD | CVSSv3 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
