CVE-2018-12020

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CVE-2018-12020

Summary:

Details: 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.

References: http://www.securitytracker.com/id/1041051, http://www.securityfocus.com/bid/104450, http://openwall.com/lists/oss-security/2018/06/08/2, http://packetstormsecurity.com/files/152703/Johnny-You-Are-Fired.html, https://access.redhat.com/errata/RHSA-2018:2181, 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://lists.gnupg.org/pipermail/gnupg-announce/2018q2/000425.html, http://seclists.org/fulldisclosure/2019/Apr/38, https://help.ecostruxureit.com/display/public/UADCE725/Security+fixes+in+StruxureWare+Data+Center+Expert+v7.6.0, https://lists.debian.org/debian-lts-announce/2021/12/msg00027.html, https://usn.ubuntu.com/3675-2/, https://www.debian.org/security/2018/dsa-4222, https://www.debian.org/security/2018/dsa-4223, https://www.debian.org/security/2018/dsa-4224, https://access.redhat.com/errata/RHSA-2018:2180, http://www.openwall.com/lists/oss-security/2019/04/30/4, https://usn.ubuntu.com/3675-1/, https://usn.ubuntu.com/3675-3/, https://usn.ubuntu.com/3964-1/, https://dev.gnupg.org/T4012