CVE-2018-18586
Published: 23 October 2018
** DISPUTED ** chmextract.c in the chmextract sample program, as distributed with libmspack before 0.8alpha, does not protect against absolute/relative pathnames in CHM files, leading to Directory Traversal. NOTE: the vendor disputes that this is a libmspack vulnerability, because chmextract.c was only intended as a source-code example, not a supported application.
Notes
| Author | Note |
|---|---|
| mdeslaur | clamav in xenial+ uses the system libmspack, trusty uses the embedded one. chmextract example isn't shipped in binary packages |
Priority
Status
| Package | Release | Status |
|---|---|---|
|
clamav Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(uses system libmspack)
|
| cosmic |
Not vulnerable
(uses system libmspack)
|
|
| trusty |
Not vulnerable
(code not compiled)
|
|
| upstream |
Needs triage
|
|
| xenial |
Not vulnerable
(uses system libmspack)
|
|
|
libmspack Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(code not compiled)
|
| cosmic |
Not vulnerable
(code not compiled)
|
|
| trusty |
Not vulnerable
(code not compiled)
|
|
| upstream |
Needs triage
|
|
| xenial |
Not vulnerable
(code not compiled)
|
|
|
Patches: upstream: https://github.com/kyz/libmspack/commit/7cadd489698be117c47efcadd742651594429e6d |
||
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 5.3 |
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | Low |
| Integrity impact | None |
| Availability impact | None |
| Vector | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |