发布时间: 2024年7月12日
修改时间: 2024年7月22日
In the Linux kernel, the following vulnerability has been resolved:kdb: Fix buffer overflow during tab-completeCurrently, when the user attempts symbol completion with the Tab key, kdbwill use strncpy() to insert the completed symbol into the command buffer.Unfortunately it passes the size of the source buffer rather than thedestination to strncpy() with predictably horrible results. Most obviouslyif the command buffer is already full but cp, the cursor position, is inthe middle of the buffer, then we will write past the end of the suppliedbuffer.Fix this by replacing the dubious strncpy() calls with memmove()/memcpy()calls plus explicit boundary checks to make sure we have enough spacebefore we start moving characters around.
| NVD | openEuler | |
|---|---|---|
| CVSS评分 | 7.8 | 5.5 |
| Attack Vector | Local | Local |
| Attack Complexity | Low | Low |
| Privileges Required | Low | Low |
| User Interaction | None | None |
| Scope | Unchanged | Unchanged |
| Confidentiality | High | None |
| Integrity | High | None |
| Availability | High | High |
| 公告名 | 概要 | 发布时间 |
|---|---|---|
| KylinSec-SA-2024-3115 | In the Linux kernel, the following vulnerability has been resolved:kdb: Fix buffer overflow during tab-completeCurrently, when the user attempts symbol completion with the Tab key, kdbwill use strncpy() to insert the completed symbol into the command buffer.Unfortunately it passes the size of the source buffer rather than thedestination to strncpy() with predictably horrible results. Most obviouslyif the command buffer is already full but cp, the cursor position, is inthe middle of the buffer, then we will write past the end of the suppliedbuffer.Fix this by replacing the dubious strncpy() calls with memmove()/memcpy()calls plus explicit boundary checks to make sure we have enough spacebefore we start moving characters around. | 2024年7月12日 |
| KylinSec-SA-2024-4806 | kernel security update | 2024年7月19日 |
| KylinSec-SA-2024-4966 | kernel security update | 2024年7月19日 |
| 产品 | 包 | 状态 |
|---|---|---|
| KY3.4-5A | kernel | Fixed |
| KY3.5.2 | kernel | Fixed |
| KY3.5.2 | kernel | Unaffected |
| V6 | kernel | Fixed |
