CVE-2018-19797
Published: 3 December 2018
In LibSass 3.5.5, a NULL Pointer Dereference in the function Sass::Selector_List::populate_extends in SharedPtr.hpp (used by ast.cpp and ast_selectors.cpp) may cause a Denial of Service (application crash) via a crafted sass input file.
Notes
| Author | Note |
|---|---|
| pfsmorigo | the affected file is src/functions.cpp (not src/fn_utils.cpp) |
Priority
Status
| Package | Release | Status |
|---|---|---|
|
libsass Launchpad, Ubuntu, Debian |
bionic |
Released
(3.4.8-1ubuntu0.1~esm1)
Available with Ubuntu Pro |
| cosmic |
Ignored
(end of life)
|
|
| disco |
Ignored
(end of life)
|
|
| eoan |
Ignored
(end of life)
|
|
| focal |
Needed
|
|
| groovy |
Ignored
(end of life)
|
|
| hirsute |
Ignored
(end of life)
|
|
| impish |
Ignored
(end of life)
|
|
| jammy |
Needed
|
|
| kinetic |
Ignored
(end of life, was needed)
|
|
| lunar |
Ignored
(end of life, was needed)
|
|
| mantic |
Needed
|
|
| noble |
Needed
|
|
| trusty |
Does not exist
|
|
| upstream |
Needs triage
|
|
| xenial |
Needed
|
|
|
Patches: upstream: https://github.com/sass/libsass/commit/c93f0581c6b7794d8c1d5637c5c4dabd591b1d57 |
||
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:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H |