CVE-2018-14625

A flaw was found in the Linux Kernel where an attacker may be able to have an uncontrolled read to kernel-memory from within a vm guest. A race condition between connect() and close() function may allow an attacker using the AF_VSOCK protocol to gather a 4 byte information leak or possibly intercept or corrupt AF_VSOCK messages destined to other clients.

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 Any operations using the original pointer are no longer valid because the memory “belongs” to the code that operates on the new pointer.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

• https://access.redhat.com/errata/RHSA-2019:2029
• https://access.redhat.com/errata/RHSA-2019:2043
• https://access.redhat.com/errata/RHSA-2019:4154
• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14625
• https://lists.debian.org/debian-lts-announce/2019/05/msg00002.html
• https://syzkaller.appspot.com/bug?extid=bd391451452fb0b93039
• https://usn.ubuntu.com/3871-1/
• https://usn.ubuntu.com/3871-3/
• https://usn.ubuntu.com/3871-4/
• https://usn.ubuntu.com/3871-5/
• https://usn.ubuntu.com/3872-1/
• https://usn.ubuntu.com/3878-1/
• https://usn.ubuntu.com/3878-2/
• https://access.redhat.com/errata/RHSA-2019:2029
• https://access.redhat.com/errata/RHSA-2019:2043
• https://access.redhat.com/errata/RHSA-2019:4154
• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14625
• https://lists.debian.org/debian-lts-announce/2019/05/msg00002.html
• https://syzkaller.appspot.com/bug?extid=bd391451452fb0b93039
• https://usn.ubuntu.com/3871-1/
• https://usn.ubuntu.com/3871-3/
• https://usn.ubuntu.com/3871-4/
• https://usn.ubuntu.com/3871-5/
• https://usn.ubuntu.com/3872-1/
• https://usn.ubuntu.com/3878-1/
• https://usn.ubuntu.com/3878-2/