CVE-2019-20393
Published: 22 January 2020
A double-free is present in libyang before v1.0-r1 in the function yyparse() when an empty description is used. Applications that use libyang to parse untrusted input yang files may be vulnerable to this flaw, which would cause a crash or potentially code execution.
Priority
Status
| Package | Release | Status |
|---|---|---|
|
libyang Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| eoan |
Ignored
(end of life)
|
|
| focal |
Needed
|
|
| groovy |
Ignored
(end of life)
|
|
| hirsute |
Ignored
(end of life)
|
|
| impish |
Not vulnerable
(1.0.176-1)
|
|
| jammy |
Not vulnerable
(1.0.176-1)
|
|
| kinetic |
Not vulnerable
(1.0.176-1)
|
|
| lunar |
Does not exist
|
|
| mantic |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(1.0.176-1)
|
|
| xenial |
Does not exist
|
|
|
Patches: upstream: https://github.com/CESNET/libyang/commit/d9feacc4a590d35dbc1af21caf9080008b4450ed |
||
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 8.8 |
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | Required |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity impact | High |
| Availability impact | High |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1793930
- https://github.com/CESNET/libyang/commit/d9feacc4a590d35dbc1af21caf9080008b4450ed
- https://github.com/CESNET/libyang/issues/742
- https://github.com/CESNET/libyang/compare/v0.16-r3...v1.0-r1
- https://www.cve.org/CVERecord?id=CVE-2019-20393
- NVD
- Launchpad
- Debian