CVE-2019-14876

In the __lshift 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 to b1 will trigger a null pointer dereference bug in case of a memory allocation failure.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
6.5 MEDIUM
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
redhatCNA
6.5 MEDIUM
NETWORK
LOW
LOW
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CVEADP
---
---
Base Score
CVSS 3.x
EPSS Score
Percentile: 53%
VendorProductVersion
newlib_projectnewlib
𝑥
< 3.3.0
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
newlib
bullseye
3.3.0-1
fixed
buster
no-dsa
stretch
no-dsa
jessie
ignored
bookworm
3.3.0-1.3+deb12u1
fixed
sid
4.4.0.20231231-4
fixed
trixie
4.4.0.20231231-4
fixed
picolibc
bullseye
unimportant
buster
no-dsa
stretch
no-dsa
jessie
ignored
bookworm
unimportant
sid
unimportant
trixie
unimportant
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
gcc-snapshot
noble
not-affected
mantic
not-affected
lunar
not-affected
jammy
ignored
focal
ignored
bionic
not-affected
xenial
not-affected
trusty
ignored
newlib
noble
not-affected
mantic
not-affected
lunar
not-affected
kinetic
ignored
jammy
ignored
impish
ignored
hirsute
ignored
groovy
ignored
focal
ignored
eoan
ignored
bionic
needed
xenial
needed
trusty
dne
Common Weakness Enumeration
References
https://census-labs.com/news/2020/01/31/multiple-null-pointer-dereference-vulnerabilities-in-newlib/
https://census-labs.com/news/2020/01/31/multiple-null-pointer-dereference-vulnerabilities-in-newlib/