CVE-2023-30571
Published: 29 May 2023
Libarchive through 3.6.2 can cause directories to have world-writable permissions. The umask() call inside archive_write_disk_posix.c changes the umask of the whole process for a very short period of time; a race condition with another thread can lead to a permanent umask 0 setting. Such a race condition could lead to implicit directory creation with permissions 0777 (without the sticky bit), which means that any low-privileged local user can delete and rename files inside those directories.
Notes
| Author | Note |
|---|---|
| mdeslaur | Upstream fix is just a documentation change to specify that users of libarchive need to use a mutex. We will not be releasing a security update to change the documentation. Marking this CVE as ignored for all releases. |
Priority
Status
| Package | Release | Status |
|---|---|---|
|
libarchive Launchpad, Ubuntu, Debian |
bionic |
Ignored
|
| focal |
Ignored
|
|
| jammy |
Ignored
|
|
| kinetic |
Ignored
(end of life, was deferred [2023-07-10])
|
|
| lunar |
Ignored
|
|
| trusty |
Ignored
|
|
| upstream |
Needs triage
|
|
| xenial |
Ignored
|
|
|
Patches: upstream: https://github.com/libarchive/libarchive/pull/1875 upstream: https://github.com/libarchive/libarchive/commit/27bad820790aacdff32dcbd09eeca69037d7c0ac |
||
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 5.3 |
| Attack vector | Local |
| Attack complexity | High |
| Privileges required | Low |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity impact | Low |
| Availability impact | High |
| Vector | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:H |