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CVE-2018-12020

Status Candidate

Overview

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.

Related Files

Red Hat Security Advisory 2018-2181-01
Posted Jul 11, 2018
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2018-2181-01 - The GNU Privacy Guard is a tool for encrypting data and creating digital signatures, compliant with OpenPGP and S/MIME standards. Issues addressed include a bypass vulnerability.

tags | advisory, bypass
systems | linux, redhat
advisories | CVE-2018-12020
MD5 | dff6c5a4c4358378431bd385ba866ec7
Red Hat Security Advisory 2018-2180-01
Posted Jul 11, 2018
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2018-2180-01 - The GNU Privacy Guard is a tool for encrypting data and creating digital signatures, compliant with OpenPGP and S/MIME standards. Issues addressed include a bypass vulnerability.

tags | advisory, bypass
systems | linux, redhat
advisories | CVE-2018-12020
MD5 | 7a1bcbb4f44332072fe71fea5303c4da
Slackware Security Advisory - gnupg Updates
Posted Jun 20, 2018
Authored by Slackware Security Team | Site slackware.com

Slackware Security Advisory - New gnupg packages are available for Slackware 13.0, 13.1, 13.37, 14.0, 14.1, 14.2, and -current to fix a security issue.

tags | advisory
systems | linux, slackware
advisories | CVE-2018-12020
MD5 | 5f95b683f49143b20ca8b521cb2f50ce
Ubuntu Security Notice USN-3675-3
Posted Jun 18, 2018
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3675-3 - USN-3675-1 fixed a vulnerability in GnuPG. This update provides the corresponding update for Ubuntu 12.04 ESM. Marcus Brinkmann discovered that during decryption or verification, GnuPG did not properly filter out terminal sequences when reporting the original filename. An attacker could use this to specially craft a file that would cause an application parsing GnuPG output to incorrectly interpret the status of the cryptographic operation reported by GnuPG. Various other issues were also addressed.

tags | advisory
systems | linux, ubuntu
advisories | CVE-2018-12020
MD5 | 563a9a928ab29560f4bcb9624b999abd
Ubuntu Security Notice USN-3675-2
Posted Jun 14, 2018
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3675-2 - USN-3675-1 fixed a vulnerability in GnuPG 2 for Ubuntu 18.04 LTS and Ubuntu 17.10. This update provides the corresponding update for GnuPG 2 in Ubuntu 16.04 LTS and Ubuntu 14.04 LTS. Marcus Brinkmann discovered that during decryption or verification, GnuPG did not properly filter out terminal sequences when reporting the original filename. An attacker could use this to specially craft a file that would cause an application parsing GnuPG output to incorrectly interpret the status of the cryptographic operation reported by GnuPG. Various other issues were also addressed.

tags | advisory
systems | linux, ubuntu
advisories | CVE-2018-12020
MD5 | 7bb33630cd3b5d2a623f796ae002ea14
Ubuntu Security Notice USN-3675-1
Posted Jun 11, 2018
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3675-1 - Marcus Brinkmann discovered that during decryption or verification, GnuPG did not properly filter out terminal sequences when reporting the original filename. An attacker could use this to specially craft a file that would cause an application parsing GnuPG output to incorrectly interpret the status of the cryptographic operation reported by GnuPG. Lance Vick discovered that GnuPG did not enforce configurations where key certification required an offline master Certify key. An attacker with access to a signing subkey could generate certifications that appeared to be valid. This issue only affected Ubuntu 18.04 LTS. Various other issues were also addressed.

tags | advisory
systems | linux, ubuntu
advisories | CVE-2018-12020, CVE-2018-9234
MD5 | 8892b2e9f917af8dd1d4c8b056a3f11e
Debian Security Advisory 4223-1
Posted Jun 9, 2018
Authored by Debian | Site debian.org

Debian Linux Security Advisory 4223-1 - Marcus Brinkmann discovered that GnuGPG performed insufficient sanitisation of file names displayed in status messages, which could be abused to fake the verification status of a signed email.

tags | advisory
systems | linux, debian
advisories | CVE-2018-12020
MD5 | 5de2f16d80f3fa5b50328a10036e3b18
Debian Security Advisory 4222-1
Posted Jun 9, 2018
Authored by Debian | Site debian.org

Debian Linux Security Advisory 4222-1 - Marcus Brinkmann discovered that GnuGPG performed insufficient sanitisation of file names displayed in status messages, which could be abused to fake the verification status of a signed email.

tags | advisory
systems | linux, debian
advisories | CVE-2018-12020
MD5 | 0aac941a2a25af5264e133c5a1387b2a
Slackware Security Advisory - gnupg2 Updates
Posted Jun 8, 2018
Authored by Slackware Security Team | Site slackware.com

Slackware Security Advisory - New gnupg2 packages are available for Slackware 13.37, 14.0, 14.1, 14.2, and - -current to fix a security issue.

tags | advisory
systems | linux, slackware
advisories | CVE-2018-12020
MD5 | dcd3c89e67645bad6c930734f319fb50
Debian Security Advisory 4224-1
Posted Jun 8, 2018
Authored by Debian | Site debian.org

Debian Linux Security Advisory 4224-1 - Marcus Brinkmann discovered that GnuGPG performed insufficient sanitisation of file names displayed in status messages, which could be abused to fake the verification status of a signed email.

tags | advisory
systems | linux, debian
advisories | CVE-2018-12020
MD5 | f5973ec905525583de23dde81261f20a
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