CVE-2019-1999 Use after free in Android

What is CVE-2019-1999?

CVE-2019-1999 is a high-severity use after free vulnerability in Canonical Ubuntu Linux, published on 28 Feb 2019. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

In binder_alloc_free_page of binder_alloc.c, there is a possible double free due to improper locking. This could lead to local escalation of privilege in the kernel with no additional execution privileges needed. User interaction is not needed for exploitation. Product: Android. Versions: Android kernel. Android ID: A-120025196.

Weakness: CWE-415

Which versions are affected by CVE-2019-1999?

It affects 3 products.

Products include Canonical Ubuntu Linux, Debian Debian Linux, Google Android.

How do I fix CVE-2019-1999?

Apply the vendor's patch.

Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.

Is CVE-2019-1999 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2019-1999 exists.

Public exploit code: 1 Exploit-DB entry.

Other vulnerabilities in Canonical Ubuntu Linux

• CVE-2020-11651 SaltStack Salt Authentication Bypass Exploited Critical 9.8
• CVE-2020-7247 OpenSMTPD Remote Code Execution Exploited Critical 9.8
• CVE-2019-16928 Exim Out-of-bounds Write Exploited Critical 9.8
• CVE-2018-6789 Exim Buffer Overflow Exploited Critical 9.8
• CVE-2015-2590 Oracle Java SE and Java SE Embedded Remote Code Execution Exploited Critical 9.8

All Canonical Ubuntu Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2019-1999, GHSA-h74g-q6cf-5qxm, UBUNTU-CVE-2019-1999.