CVE-2019-9003

In the Linux kernel before 4.20.5, attackers can trigger a drivers/char/ipmi/ipmi_msghandler.c use-after-free and OOPS by arranging for certain simultaneous execution of the code, as demonstrated by a service ipmievd restart loop.

Weakness

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory “belongs” to the code that operates on the new pointer.

Affected Software

Potential Mitigations

References

• http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=77f8269606bf95fcb232ee86f6da80886f1dfae8
• http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00037.html
• http://www.securityfocus.com/bid/107145
• https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.20.5
• https://github.com/torvalds/linux/commit/77f8269606bf95fcb232ee86f6da80886f1dfae8
• https://security.netapp.com/advisory/ntap-20190327-0002/
• https://usn.ubuntu.com/3930-1/
• https://usn.ubuntu.com/3930-2/
• http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=77f8269606bf95fcb232ee86f6da80886f1dfae8
• http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00037.html
• http://www.securityfocus.com/bid/107145
• https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.20.5
• https://github.com/torvalds/linux/commit/77f8269606bf95fcb232ee86f6da80886f1dfae8
• https://security.netapp.com/advisory/ntap-20190327-0002/
• https://usn.ubuntu.com/3930-1/
• https://usn.ubuntu.com/3930-2/