CVE-2019-20398
Published: 22 January 2020
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.
Priority
Status
Package | Release | Status |
---|---|---|
libyang Launchpad, Ubuntu, Debian |
hirsute |
Ignored
(end of life)
|
jammy |
Not vulnerable
(1.0.176-1)
|
|
kinetic |
Not vulnerable
(1.0.176-1)
|
|
lunar |
Does not exist
|
|
bionic |
Does not exist
|
|
eoan |
Ignored
(end of life)
|
|
focal |
Needed
|
|
groovy |
Ignored
(end of life)
|
|
impish |
Not vulnerable
(1.0.176-1)
|
|
trusty |
Does not exist
|
|
upstream |
Released
(1.0.176-1)
|
|
xenial |
Does not exist
|
|
mantic |
Does not exist
|
|
Patches: upstream: https://github.com/CESNET/libyang/commit/7852b272ef77f8098c35deea6c6f09cb78176f08 |
Severity score breakdown
Parameter | Value |
---|---|
Base score | 6.5 |
Attack vector | Network |
Attack complexity | Low |
Privileges required | None |
User interaction | Required |
Scope | Unchanged |
Confidentiality | None |
Integrity impact | None |
Availability impact | High |
Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H |
References
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-20398
- https://bugzilla.redhat.com/show_bug.cgi?id=1793935
- https://github.com/CESNET/libyang/commit/7852b272ef77f8098c35deea6c6f09cb78176f08
- https://github.com/CESNET/libyang/issues/773
- https://github.com/CESNET/libyang/compare/v1.0-r2...v1.0-r3
- NVD
- Launchpad
- Debian