CVE-2018-12020 Information

Description

mainproc.c in GnuPG before 2.2.8 mishandles the original filename during decryption and verification actions which allows remote attackers to spoof the output that GnuPG sends on file descriptor 2 to other programs that use the --status-fd 2\ option. For example the OpenPGP data might represent an original filename that contains line feed characters in conjunction with GOODSIG or VALIDSIG status codes.

CVSS Vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Reference

http://openwall.com/lists/oss-security/2018/06/08/2 http://packetstormsecurity.com/files/152703/Johnny-You-Are-Fired.html http://seclists.org/fulldisclosure/2019/Apr/38 http://www.openwall.com/lists/oss-security/2019/04/30/4 http://www.securityfocus.com/bid/104450 http://www.securitytracker.com/id/1041051 https://access.redhat.com/errata/RHSA-2018:2180 https://access.redhat.com/errata/RHSA-2018:2181 https://dev.gnupg.org/T4012 https://github.com/RUB-NDS/Johnny-You-Are-Fired https://github.com/RUB-NDS/Johnny-You-Are-Fired/blob/master/paper/johnny-fired.pdf https://help.ecostruxureit.com/display/public/UADCE725/Security+fixes+in+StruxureWare+Data+Center+Expert+v7.6.0 https://lists.gnupg.org/pipermail/gnupg-announce/2018q2/000425.html https://usn.ubuntu.com/3675-1/ https://usn.ubuntu.com/3675-2/ https://usn.ubuntu.com/3675-3/ https://usn.ubuntu.com/3964-1/ https://www.debian.org/security/2018/dsa-4222 https://www.debian.org/security/2018/dsa-4223 https://www.debian.org/security/2018/dsa-4224

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

HIGH

Base Score

NONE

Base Severity

7.5