An update for gnupg2 is now available for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

The GNU Privacy Guard (GnuPG or GPG) is a tool for encrypting data and creating digital signatures, compliant with OpenPGP and S/MIME standards.

Security Fix(es) :

* gnupg2: Improper sanitization of filenames allows for the display of fake status messages and the bypass of signature verification (CVE-2018-12020)

For more details about the security issue(s), including the impact, a CVSS score, and other related information, refer to the CVE page(s) listed in the References section.

Important security update to new upstream gnupg version 2.2.8 and libgpg-error 1.31

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website.
Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

This update for enigmail fixes vulnerabilities that allowed spoofing of e-mail signatures :

  - CVE-2018-12019: signature spoofing via specially crafted     OpenPGP user IDs (boo#1097525)

  - CVE-2018-12020: signature spoofing via diagnostic output     of the original file name in GnuPG verbose mode     (boo#1096745) This mitigation prevents CVE-2018-12020     from being exploited even if GnuPG is not patched.

This update for python-python-gnupg to version 0.4.3 fixes the following issues :

The following security vulnerabilities were addressed :

  - Sanitize diagnostic output of the original file name in     verbose mode (CVE-2018-12020 boo#1096745)

The following other changes were made :

  - Add --no-verbose to the gpg command line, in case     verbose is specified is gpg.conf.

  - Add expect_passphrase password for use on GnuPG >= 2.1     when passing passphrase to gpg via pinentry

  - Provide a trust_keys method to allow setting the trust     level for keys

  - When the gpg executable is not found, note the path used     in the exception message

  - Make error messages more informational

According to the version of the gnupg2 package installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerability :

  - A data validation flaw was found in the way gnupg     processes file names during decryption and signature     validation. An attacker may be able to inject messages     into gnupg verbose message logging which may have the     potential to bypass the integrity of signature     authentication mechanisms and could have other     unintended consequences if applications take action(s)     based on parsed verbose gnupg output.(CVE-2018-12020)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

- doc Remove documentation for future option faked sys

  - build Don't use dev srandom on OpenBSD

  - Do not use C99 feature

  - g10 Fix regexp sanitization

  - g10 Push compress filter only if compressed

  - gpg Sanitize diagnostic with the original file name     [CVE-2018-12020]

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website.
Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The remote NewStart CGSL host, running version MAIN 4.05, has gnupg2 packages installed that are affected by a vulnerability:

  - A data validation flaw was found in the way gnupg     processes file names during decryption and signature     validation. An attacker may be able to inject messages     into gnupg verbose message logging which may have the     potential to bypass the integrity of signature     authentication mechanisms and could have other     unintended consequences if applications take action(s)     based on parsed verbose gnupg output. (CVE-2018-12020)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Ubuntu 18.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-3964-1 advisory.

    Marcus Brinkmann discovered that GnuPG before 2.2.8 improperly handled certain command line parameters. A     remote attacker could use this to spoof the output of GnuPG and cause unsigned e-mail to appear signed.
    (CVE-2018-12020)

    It was discovered that python-gnupg incorrectly handled the GPG passphrase. A remote attacker could send a     specially crafted passphrase that would allow them to control the output of encryption and decryption     operations. (CVE-2019-6690)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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.
    (CVE-2018-12020)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	名称	产品	系列	发布时间	最近更新时间	严重程度
111079	CentOS 7 : gnupg2 (CESA-2018:2181)	Nessus	CentOS Local Security Checks	2018/7/16	2019/12/31	high
120365	Fedora 28 : gnupg2 / libgpg-error (2018-3dc16842e2)	Nessus	Fedora Local Security Checks	2019/1/3	2024/7/8	high
123195	openSUSE Security Update : enigmail (openSUSE-2019-477)	Nessus	SuSE Local Security Checks	2019/3/27	2024/6/12	high
123196	openSUSE Security Update : python-python-gnupg (openSUSE-2019-478)	Nessus	SuSE Local Security Checks	2019/3/27	2024/6/11	high
124960	EulerOS Virtualization 3.0.1.0 : gnupg2 (EulerOS-SA-2019-1457)	Nessus	Huawei Local Security Checks	2019/5/14	2024/5/22	high
120411	Fedora 28 : gnupg (2018-4ef71d3525)	Nessus	Fedora Local Security Checks	2019/1/3	2024/7/5	high
127393	NewStart CGSL MAIN 4.05 : gnupg2 Vulnerability (NS-SA-2019-0135)	Nessus	NewStart CGSL Local Security Checks	2019/8/12	2021/1/14	high
124587	Ubuntu 18.04 LTS : python-gnupg vulnerabilities (USN-3964-1)	Nessus	Ubuntu Local Security Checks	2019/5/3	2024/8/27	high
221994	Linux Distros Unpatched Vulnerability : CVE-2018-12020	Nessus	Misc.	2025/3/4	2026/7/17	high

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