CVE-2018-12020
Published: August 31, 2023Last modified: August 31, 2023
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.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 7.5 |
| Attack Vector | NETWORK |
| Attack complexity | LOW |
| Privileges required | NONE |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | NONE |
| Integrity impact | HIGH |
| Availability impact | NONE |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | gnupg | Not affected (2.2.40-r0) |
| Stream | gnupg | Not affected (2.4.3-r1) |
References
- 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.debian.org/debian-lts-announce/2021/12/msg00027.html
- 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