Interaction between the sks-keyserver code through 1.2.0 of the SKS keyserver network, and GnuPG through 2.2.16, makes it risky to have a GnuPG keyserver configuration line referring to a host on the SKS keyserver network. Retrieving data from this network may cause a persistent denial of service, because of a Certificate Spamming Attack.

The remote Redhat Enterprise Linux 7 host has one or more packages installed that are affected by multiple vulnerabilities that have been acknowledged by the vendor but will not be patched.

  - GnuPG: Unenforced configuration allows for apparently valid certifications actually signed by signing     subkeys (CVE-2018-9234)

  - Libgcrypt before 1.6.3 and GnuPG before 1.4.19 does not implement ciphertext blinding for Elgamal     decryption, which allows physically proximate attackers to obtain the server's private key by determining     factors using crafted ciphertext and the fluctuations in the electromagnetic field during multiplication.
    (CVE-2014-3591)

  - The do_uncompress function in g10/compress.c in GnuPG 1.x before 1.4.17 and 2.x before 2.0.24 allows     context-dependent attackers to cause a denial of service (infinite loop) via malformed compressed packets,     as demonstrated by an a3 01 5b ff byte sequence. (CVE-2014-4617)

Note that Nessus has not tested for these issues but has instead relied on the package manager's report that the package is installed.

The remote Rocky Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RLSA-2020:4490 advisory.

  - GnuPG version 2.1.12 - 2.2.11 contains a Cross ite Request Forgery (CSRF) vulnerability in dirmngr that     can result in Attacker controlled CSRF, Information Disclosure, DoS. This attack appear to be exploitable     via Victim must perform a WKD request, e.g. enter an email address in the composer window of     Thunderbird/Enigmail. This vulnerability appears to have been fixed in after commit     4a4bb874f63741026bd26264c43bb32b1099f060. (CVE-2018-1000858)

  - Interaction between the sks-keyserver code through 1.2.0 of the SKS keyserver network, and GnuPG through     2.2.16, makes it risky to have a GnuPG keyserver configuration line referring to a host on the SKS     keyserver network. Retrieving data from this network may cause a persistent denial of service, because of     a Certificate Spamming Attack. (CVE-2019-13050)

Note that Nessus has not tested for these issues 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 a vulnerability as referenced in the USN-5431-1 advisory.

    It was discovered that GnuPG was not properly processing keys with large amounts of signatures. An     attacker could possibly use this issue to cause a denial of service.

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

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

The remote AlmaLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALSA-2020:4490 advisory.

  - GnuPG version 2.1.12 - 2.2.11 contains a Cross ite Request Forgery (CSRF) vulnerability in dirmngr that     can result in Attacker controlled CSRF, Information Disclosure, DoS. This attack appear to be exploitable     via Victim must perform a WKD request, e.g. enter an email address in the composer window of     Thunderbird/Enigmail. This vulnerability appears to have been fixed in after commit     4a4bb874f63741026bd26264c43bb32b1099f060. (CVE-2018-1000858)

  - Interaction between the sks-keyserver code through 1.2.0 of the SKS keyserver network, and GnuPG through     2.2.16, makes it risky to have a GnuPG keyserver configuration line referring to a host on the SKS     keyserver network. Retrieving data from this network may cause a persistent denial of service, because of     a Certificate Spamming Attack. (CVE-2019-13050)

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

The remote NewStart CGSL host, running version MAIN 6.02, has gnupg2 packages installed that are affected by a vulnerability:

  - Interaction between the sks-keyserver code through 1.2.0 of the SKS keyserver network, and GnuPG through     2.2.16, makes it risky to have a GnuPG keyserver configuration line referring to a host on the SKS     keyserver network. Retrieving data from this network may cause a persistent denial of service, because of     a Certificate Spamming Attack. (CVE-2019-13050)

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

The remote CentOS Linux 8 host has packages installed that are affected by a vulnerability as referenced in the CESA-2020:4490 advisory.

  - GnuPG: interaction between the sks-keyserver code and GnuPG allows for a Certificate Spamming Attack which     leads to persistent DoS (CVE-2019-13050)

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

The remote Oracle Linux 8 host has packages installed that are affected by a vulnerability as referenced in the ELSA-2020-4490 advisory.

    [2.2.20-2]
    - fixes for issues found in Coverity scan

    [2.2.20-1]
    - upgrade to 2.2.20

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

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

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2020:4490 advisory.

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

    The following packages have been upgraded to a later upstream version: gnupg2 (2.2.20). (BZ#1663944)

    Security Fix(es):

    * GnuPG: interaction between the sks-keyserver code and GnuPG allows for a Certificate Spamming Attack     which leads to persistent DoS (CVE-2019-13050)

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

    Additional Changes:

    For detailed information on changes in this release, see the Red Hat Enterprise Linux 8.3 Release Notes     linked from the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

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

According to the version of the gnupg2 package installed, the EulerOS Virtualization for ARM 64 installation on the remote host is affected by the following vulnerability :

  - Interaction between the sks-keyserver code through     1.2.0 of the SKS keyserver network, and GnuPG through     2.2.16, makes it risky to have a GnuPG keyserver     configuration line referring to a host on the SKS     keyserver network. Retrieving data from this network     may cause a persistent denial of service, because of a     Certificate Spamming Attack.(CVE-2019-13050)

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.

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

  - Interaction between the sks-keyserver code through     1.2.0 of the SKS keyserver network, and GnuPG through     2.2.16, makes it risky to have a GnuPG keyserver     configuration line referring to a host on the SKS     keyserver network. Retrieving data from this network     may cause a persistent denial of service, because of a     Certificate Spamming Attack.(CVE-2019-13050)

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.

This update for gpg2 fixes the following issues :

Security issue fixed :

CVE-2019-13050: Fixed denial-of-service attacks via big keys.
(bsc#1141093)

Non-security issue fixed: Allow coredumps in X11 desktop sessions (bsc#1124847).

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

An update of the gnupg package has been released.

This update for gpg2 fixes the following issues :

Security issue fixed :

  - CVE-2019-13050: Fixed a denial of service attacks via     big keys (bsc#1141093).

Non-security issue fixed :

  - Allow coredumps in X11 desktop sessions (bsc#1124847)

This update was imported from the SUSE:SLE-15:Update update project.

This update for gpg2 fixes the following issues :

Security issue fixed :

CVE-2019-13050: Fixed a denial of service attacks via big keys (bsc#1141093).

Non-security issue fixed: Allow coredumps in X11 desktop sessions (bsc#1124847)

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

Minor update to version 2.2.17 from upstream with a security issue (Certificate Spamming Attack) mitigation.

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.

ID	Name	Product	Family	Severity
198980	RHEL 7 : gnupg (Unpatched Vulnerability)	Nessus	Red Hat Local Security Checks	high
184545	Rocky Linux 8 : gnupg2 (RLSA-2020:4490)	Nessus	Rocky Linux Local Security Checks	high
161663	Ubuntu 18.04 LTS : GnuPG vulnerability (USN-5431-1)	Nessus	Ubuntu Local Security Checks	high
157527	AlmaLinux 8 : gnupg2 (ALSA-2020:4490)	Nessus	Alma Linux Local Security Checks	high
147402	NewStart CGSL MAIN 6.02 : gnupg2 Vulnerability (NS-SA-2021-0076)	Nessus	NewStart CGSL Local Security Checks	high
145998	CentOS 8 : gnupg2 (CESA-2020:4490)	Nessus	CentOS Local Security Checks	high
142814	Oracle Linux 8 : gnupg2 (ELSA-2020-4490)	Nessus	Oracle Linux Local Security Checks	high
142389	RHEL 8 : gnupg2 (RHSA-2020:4490)	Nessus	Red Hat Local Security Checks	high
135145	EulerOS Virtualization for ARM 64 3.0.6.0 : gnupg2 (EulerOS-SA-2020-1358)	Nessus	Huawei Local Security Checks	high
133987	EulerOS 2.0 SP8 : gnupg2 (EulerOS-SA-2020-1153)	Nessus	Huawei Local Security Checks	high
129465	SUSE SLED12 / SLES12 Security Update : gpg2 (SUSE-SU-2019:2480-1)	Nessus	SuSE Local Security Checks	high
128717	Photon OS 2.0: Gnupg PHSA-2019-2.0-0171	Nessus	PhotonOS Local Security Checks	high
128168	Photon OS 1.0: Gnupg PHSA-2019-1.0-0246	Nessus	PhotonOS Local Security Checks	high
128153	Photon OS 3.0: Gnupg PHSA-2019-3.0-0024	Nessus	PhotonOS Local Security Checks	high
128009	openSUSE Security Update : gpg2 (openSUSE-2019-1917)	Nessus	SuSE Local Security Checks	high
127748	SUSE SLED15 / SLES15 Security Update : gpg2 (SUSE-SU-2019:2006-1)	Nessus	SuSE Local Security Checks	high
126797	Fedora 30 : gnupg2 (2019-2f259a6c0a)	Nessus	Fedora Local Security Checks	high

Detections

Analytics

CVE-2019-13050

high

Tenable Plugins

high

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