CVE-2019-14874 Null dereference in newlib
A null pointer dereference in newlib's __i2b function allows attackers to cause a denial of service via memory allocation failure.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2019-14874?
CVE-2019-14874 is a medium-severity vulnerability in Red Hat newlib, published on 19 Mar 2020. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
In the __i2b function of the newlib libc library, all versions prior to 3.3.0 (see newlib/libc/stdlib/mprec.c), Balloc is used to allocate a big integer, however no check is performed to verify if the allocation succeeded or not. The access of _ x[0] will trigger a null pointer dereference bug in case of a memory allocation failure.
Weakness: CWE-476
Which versions are affected by CVE-2019-14874?
It affects 1 product.
Products include Newlib Project Newlib.
How do I fix CVE-2019-14874?
Upgrade to a fixed version.
Is CVE-2019-14874 being exploited?
There is no known exploitation of CVE-2019-14874 in the wild and no public exploit code.
Other vulnerabilities in Red Hat newlib
Sources
Also known as DEBIAN-CVE-2019-14874, GHSA-wc8v-w7xh-26xj, UBUNTU-CVE-2019-14874.