CVE-2020-10732
A flaw was found in the Linux kernel's implementation of Userspace core dumps. This flaw allows an attacker with a local account to crash a trivial program and exfiltrate private kernel data.
02 / AFFECTED SOFTWARE
Affected packages
1 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
In fill_thread_core_info of binfmt_elf.c, there is a possible leak of kernel heap memory due to uninitialized data. This could lead to local information disclosure to an application core dump with no additional execution privileges needed. User interaction is not needed for exploitation.
A flaw was found in the Linux kernel's implementation of Userspace core dumps. This flaw allows an attacker with a local account to crash a trivial program and exfiltrate private kernel data.
05 / REFERENCES
Further evidence
- http://android.googlesource.com/kernel/common/+/1d605416fb7175e1adf094251466caa52093b413
- https://source.android.com/security/bulletin/2021-01-01
- http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00022.html
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00008.html
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-10732
- https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=aca969cacf07f41070d788ce2b8ca71f09d5207d
- https://github.com/google/kmsan/issues/76
- https://github.com/ruscur/linux/commit/a95cdec9fa0c08e6eeb410d461c03af8fd1fef0a
- https://lore.kernel.org/lkml/CAG_fn=VZZ7yUxtOGzuTLkr7wmfXWtKK9BHHYawj=rt9XWnCYvg%40mail.gmail.com/
- https://security.netapp.com/advisory/ntap-20210129-0005/
- https://twitter.com/grsecurity/status/1252558055629299712
- https://usn.ubuntu.com/4411-1/
- https://usn.ubuntu.com/4427-1/
- https://usn.ubuntu.com/4439-1/
- https://usn.ubuntu.com/4440-1/
- https://usn.ubuntu.com/4485-1/