CVE-2019-12210 - In Yubico pam-u2f 1.0.7, when configured with debug and a custom debug log file is set using debug_f

CVE-2019-12210

Summary

In Yubico pam-u2f 1.0.7, when configured with debug and a custom debug log file is set using debug_file, that file descriptor is not closed when a new process is spawned. This leads to the file descriptor being inherited into the child process; the child process can then read from and write to it. This can leak sensitive information and also, if written to, be used to fill the disk or plant misinformation.

References

Vulnerable Configurations

cpe:2.3:a:yubico:pam-u2f:1.0.7:*:*:*:*:*:*:*
cpe:2.3:a:yubico:pam-u2f:1.0.7:*:*:*:*:*:*:*

CVSS

Base:	5.5 (as of 24-08-2020 - 17:37)
Impact:
Exploitability:

CWE

NVD-CWE-noinfo

CAPEC

Access

Vector	Complexity	Authentication
NETWORK	LOW	SINGLE

Impact

Confidentiality	Integrity	Availability
PARTIAL	PARTIAL	NONE

cvss-vector via4

AV:N/AC:L/Au:S/C:P/I:P/A:N

refmap via4

confirm	https://developers.yubico.com/pam-u2f/Release_Notes.html https://github.com/Yubico/pam-u2f/commit/18b1914e32b74ff52000f10e97067e841e5fff62
mlist	[oss-security] 20190605 pam-u2f: CVE-2019-12210: debug_file file descriptor leak, CVE-2019-12209: symlink attack on u2f_keys leading to possible information leak
suse	openSUSE-SU-2019:1708 openSUSE-SU-2019:1725

Last major update

24-08-2020 - 17:37

Published

04-06-2019 - 21:29

Last modified

24-08-2020 - 17:37