CVE-2019-20398

A NULL pointer dereference is present in libyang before v1.0-r3 in the function lys_extension_instances_free() due to a copy of unresolved extensions in lys_restr_dup(). Applications that use libyang to parse untrusted input yang files may crash.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
6.5 MEDIUM
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
mitreCNA
---
---
CVEADP
---
---
Base Score
CVSS 3.x
EPSS Score
Percentile: 32%
VendorProductVersion
cesnetlibyang
0.11:r1
cesnetlibyang
0.11:r2
cesnetlibyang
0.12:r1
cesnetlibyang
0.12:r2
cesnetlibyang
0.13:r1
cesnetlibyang
0.13:r2
cesnetlibyang
0.14:r1
cesnetlibyang
0.15:r1
cesnetlibyang
0.16:r1
cesnetlibyang
0.16:r2
cesnetlibyang
0.16:r3
cesnetlibyang
1.0:r1
cesnetlibyang
1.0:r2
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
libyang
bullseye
1.0.225-1.1
fixed
sid
3.4.2+dfsg-2
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
libyang
noble
dne
mantic
dne
lunar
dne
kinetic
not-affected
jammy
not-affected
impish
not-affected
hirsute
ignored
groovy
ignored
focal
needed
eoan
ignored
bionic
dne
xenial
dne
trusty
dne
Common Weakness Enumeration
References
https://bugzilla.redhat.com/show_bug.cgi?id=1793935
https://github.com/CESNET/libyang/commit/7852b272ef77f8098c35deea6c6f09cb78176f08
https://github.com/CESNET/libyang/compare/v1.0-r2...v1.0-r3
https://github.com/CESNET/libyang/issues/773
https://lists.debian.org/debian-lts-announce/2023/09/msg00019.html
https://bugzilla.redhat.com/show_bug.cgi?id=1793935
https://github.com/CESNET/libyang/commit/7852b272ef77f8098c35deea6c6f09cb78176f08
https://github.com/CESNET/libyang/compare/v1.0-r2...v1.0-r3
https://github.com/CESNET/libyang/issues/773
https://lists.debian.org/debian-lts-announce/2023/09/msg00019.html