An issue was discovered in klibc before 2.0.9. Additions in the malloc() function may result in an integer overflow and a subsequent heap buffer overflow.
The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.
| Link | Tags |
|---|---|
| https://kernel.org/pub/linux/libs/klibc/2.0/ | third party advisory release notes |
| https://lists.zytor.com/archives/klibc/2021-April/004593.html | mailing list third party advisory release notes |
| https://git.kernel.org/pub/scm/libs/klibc/klibc.git/commit/?id=a31ae8c508fc8d1bca4f57e9f9f88127572d5202 | third party advisory patch |
| http://www.openwall.com/lists/oss-security/2021/04/30/1 | mailing list third party advisory release notes |
| https://lists.debian.org/debian-lts-announce/2021/06/msg00025.html | third party advisory mailing list |
| https://github.com/huolinjue/klibc/commit/a31ae8c508fc8d1bca4f57e9f9f88127572d5202 |