CVE-2021-38185 Information

Description

GNU cpio through 2.13 allows attackers to execute arbitrary code via a crafted pattern file because of a dstring.c ds_fgetstr integer overflow that triggers an out-of-bounds heap write. NOTE: it is unclear whether there are common cases where the pattern file associated with the -E option is untrusted data.

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Reference

https://github.com/fangqyi/cpiopwn https://lists.gnu.org/archive/html/bug-cpio/2021-08/msg00002.html https://lists.gnu.org/archive/html/bug-cpio/2021-08/msg00000.html https://git.savannah.gnu.org/cgit/cpio.git/commit/?id=dd96882877721703e19272fe25034560b794061b

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

REQUIRED

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

7.8