GnuPG 1.4.x, 2.0.x, and 2.1.x treats a key flags subpacket with all bits cleared (no usage permitted) as if it has all bits set (all usage permitted), which might allow remote attackers to bypass intended cryptographic protection mechanisms by leveraging the subkey.

The remote OracleVM system is missing necessary patches to address critical security updates :

  - fix CVE-2018-12020 - missing sanitization of original     filename

GnuPG 1.4.x, 2.0.x, and 2.1.x treats a key flags subpacket with all bits cleared (no usage permitted) as if it has all bits set (all usage permitted), which might allow remote attackers to bypass intended cryptographic protection mechanisms by leveraging the subkey.
(CVE-2013-4351)

The remote Solaris system is missing necessary patches to address security updates :

  - GnuPG 1.4.x, 2.0.x, and 2.1.x treats a key flags     subpacket with all bits cleared (no usage permitted) as     if it has all bits set (all usage permitted), which     might allow remote attackers to bypass intended     cryptographic protection mechanisms by leveraging the     subkey. (CVE-2013-4351)

  - The compressed packet parser in GnuPG 1.4.x before     1.4.15 and 2.0.x before 2.0.22 allows remote attackers     to cause a denial of service (infinite recursion) via a     crafted OpenPGP message. (CVE-2013-4402)

- GnuPG treated no-usage-permitted keys as     all-usages-permitted

  - added gpg2-CVE-2013-4351.patch

  - GnuPG treated no-usage-permitted keys as     all-usages-permitted

  - added gpg2-CVE-2013-4351.patch

A vulnerability was discovered for the gpg2 packages in openSUSE versions 12.2 and 12.3.

The remote host is affected by the vulnerability described in GLSA-201402-24 (GnuPG, Libgcrypt: Multiple vulnerabilities)

    Multiple vulnerabilities have been discovered in GnuPG and Libgcrypt.
      Please review the CVE identifiers referenced below for details.
  Impact :

    An unauthenticated remote attacker may be able to execute arbitrary code       with the privileges of the user running GnuPG, cause a Denial of Service       condition, or bypass security restrictions. Additionally, a side-channel       attack may allow a local attacker to recover a private key, please review       &ldquo;Flush+Reload: a High Resolution, Low Noise, L3 Cache Side-Channel       Attack&rdquo; in the References section for further details.
  Workaround :

    There is no known workaround at this time.

GnuPG 1.4.x, 2.0.x, and 2.1.x treats a key flags subpacket with all bits cleared (no usage permitted) as if it has all bits set (all usage permitted), which might allow remote attackers to bypass intended cryptographic protection mechanisms by leveraging the subkey.

The compressed packet parser in GnuPG 1.4.x before 1.4.15 and 2.0.x before 2.0.22 allows remote attackers to cause a denial of service (infinite recursion) via a crafted OpenPGP message.

- CVE-2013-4351

    - CVE-2013-4402

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

An updated gnupg2 package that fixes three security issues is now available for Red Hat Enterprise Linux 5 and 6.

The Red Hat Security Response Team has rated this update as having moderate security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.

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

A denial of service flaw was found in the way GnuPG parsed certain compressed OpenPGP packets. An attacker could use this flaw to send specially crafted input data to GnuPG, making GnuPG enter an infinite loop when parsing data. (CVE-2013-4402)

It was found that importing a corrupted public key into a GnuPG keyring database corrupted that keyring. An attacker could use this flaw to trick a local user into importing a specially crafted public key into their keyring database, causing the keyring to be corrupted and preventing its further use. (CVE-2012-6085)

It was found that GnuPG did not properly interpret the key flags in a PGP key packet. GPG could accept a key for uses not indicated by its holder. (CVE-2013-4351)

Red Hat would like to thank Werner Koch for reporting the CVE-2013-4402 issue. Upstream acknowledges Taylor R Campbell as the original reporter.

All gnupg2 users are advised to upgrade to this updated package, which contains backported patches to correct these issues.

An updated gnupg package that fixes multiple security issues is now available for Red Hat Enterprise Linux 5.

The Red Hat Security Response Team has rated this update as having moderate security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.

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

It was found that GnuPG was vulnerable to the Yarom/Falkner flush+reload cache side-channel attack on the RSA secret exponent. An attacker able to execute a process on the logical CPU that shared the L3 cache with the GnuPG process (such as a different local user or a user of a KVM guest running on the same host with the kernel same-page merging functionality enabled) could possibly use this flaw to obtain portions of the RSA secret key. (CVE-2013-4242)

A denial of service flaw was found in the way GnuPG parsed certain compressed OpenPGP packets. An attacker could use this flaw to send specially crafted input data to GnuPG, making GnuPG enter an infinite loop when parsing data. (CVE-2013-4402)

It was found that importing a corrupted public key into a GnuPG keyring database corrupted that keyring. An attacker could use this flaw to trick a local user into importing a specially crafted public key into their keyring database, causing the keyring to be corrupted and preventing its further use. (CVE-2012-6085)

It was found that GnuPG did not properly interpret the key flags in a PGP key packet. GPG could accept a key for uses not indicated by its holder. (CVE-2013-4351)

Red Hat would like to thank Werner Koch for reporting the CVE-2013-4402 issue. Upstream acknowledges Taylor R Campbell as the original reporter.

All gnupg users are advised to upgrade to this updated package, which contains backported patches to correct these issues.

This GnuPG update fixes two security issues :

  - GnuPG treated no-usage-permitted keys as     all-usages-permitted. (CVE-2013-4351)

  - An infinite recursion in the compressed packet parser     was fixed. (CVE-2013-4402)

It was found that GnuPG was vulnerable to the Yarom/Falkner flush+reload cache side-channel attack on the RSA secret exponent. An attacker able to execute a process on the logical CPU that shared the L3 cache with the GnuPG process (such as a different local user or a user of a KVM guest running on the same host with the kernel same-page merging functionality enabled) could possibly use this flaw to obtain portions of the RSA secret key. (CVE-2013-4242)

A denial of service flaw was found in the way GnuPG parsed certain compressed OpenPGP packets. An attacker could use this flaw to send specially crafted input data to GnuPG, making GnuPG enter an infinite loop when parsing data. (CVE-2013-4402)

It was found that importing a corrupted public key into a GnuPG keyring database corrupted that keyring. An attacker could use this flaw to trick a local user into importing a specially crafted public key into their keyring database, causing the keyring to be corrupted and preventing its further use. (CVE-2012-6085)

It was found that GnuPG did not properly interpret the key flags in a PGP key packet. GPG could accept a key for uses not indicated by its holder. (CVE-2013-4351)

A denial of service flaw was found in the way GnuPG parsed certain compressed OpenPGP packets. An attacker could use this flaw to send specially crafted input data to GnuPG, making GnuPG enter an infinite loop when parsing data. (CVE-2013-4402)

It was found that importing a corrupted public key into a GnuPG keyring database corrupted that keyring. An attacker could use this flaw to trick a local user into importing a specially crafted public key into their keyring database, causing the keyring to be corrupted and preventing its further use. (CVE-2012-6085)

It was found that GnuPG did not properly interpret the key flags in a PGP key packet. GPG could accept a key for uses not indicated by its holder. (CVE-2013-4351)

The remote Redhat Enterprise Linux 5 / 6 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2013:1459 advisory.

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

    A denial of service flaw was found in the way GnuPG parsed certain     compressed OpenPGP packets. An attacker could use this flaw to send     specially crafted input data to GnuPG, making GnuPG enter an infinite loop     when parsing data. (CVE-2013-4402)

    It was found that importing a corrupted public key into a GnuPG keyring     database corrupted that keyring. An attacker could use this flaw to trick a     local user into importing a specially crafted public key into their keyring     database, causing the keyring to be corrupted and preventing its further     use. (CVE-2012-6085)

    It was found that GnuPG did not properly interpret the key flags in a PGP     key packet. GPG could accept a key for uses not indicated by its holder.
    (CVE-2013-4351)

    Red Hat would like to thank Werner Koch for reporting the CVE-2013-4402     issue. Upstream acknowledges Taylor R Campbell as the original reporter.

    All gnupg2 users are advised to upgrade to this updated package, which     contains backported patches to correct these issues.

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.

The remote Oracle Linux 5 / 6 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2013-1459 advisory.

    - fix CVE-2013-4351 gpg treats no-usage-permitted keys as all-usages-permitted
    - fix CVE-2012-6085 GnuPG: read_block() corrupt key input validation

Tenable has extracted the preceding description block directly from the Oracle 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.

The remote Oracle Linux 5 host has a package installed that is affected by multiple vulnerabilities as referenced in the ELSA-2013-1458 advisory.

    - fix CVE-2013-4351 gpg treats no-usage-permitted keys as all-usages-permitted
    - fix CVE-2012-6085 GnuPG: read_block() corrupt key input validation
    - fix CVE-2013-4242 GnuPG susceptible to Yarom/Falkner side-channel attack
    - fix CVE-2013-4402 GnuPG: infinite recursion in the compressed packet parser

Tenable has extracted the preceding description block directly from the Oracle 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.

Multiple vulnerabilities has been discovered and corrected in gnupg :

GnuPG 1.4.x, 2.0.x, and 2.1.x treats a key flags subpacket with all bits cleared (no usage permitted) as if it has all bits set (all usage permitted), which might allow remote attackers to bypass intended cryptographic protection mechanisms by leveraging the subkey (CVE-2013-4351).

Special crafted input data may be used to cause a denial of service against GPG. GPG can be forced to recursively parse certain parts of OpenPGP messages ad infinitum (CVE-2013-4402).

The updated packages have been patched to correct this issue.

Two vulnerabilities were discovered in GnuPG 2, the GNU privacy guard, a free PGP replacement. The Common Vulnerabilities and Exposures project identifies the following problems :

  - CVE-2013-4351     When a key or subkey had its 'key flags' subpacket set     to all bits off, GnuPG currently would treat the key as     having all bits set. That is, where the owner wanted to     indicate 'no use permitted', GnuPG would interpret it as     'all use permitted'. Such 'no use permitted' keys are     rare and only used in very special circumstances.

  - CVE-2013-4402     Infinite recursion in the compressed packet parser was     possible with crafted input data, which may be used to     cause a denial of service.

Two vulnerabilities were discovered in GnuPG, the GNU privacy guard, a free PGP replacement. The Common Vulnerabilities and Exposures project identifies the following problems :

  - CVE-2013-4351     When a key or subkey had its 'key flags' subpacket set     to all bits off, GnuPG currently would treat the key as     having all bits set. That is, where the owner wanted to     indicate 'no use permitted', GnuPG would interpret it as     'all use permitted'. Such 'no use permitted' keys are     rare and only used in very special circumstances.

  - CVE-2013-4402     Infinite recursion in the compressed packet parser was     possible with crafted input data, which may be used to     cause a denial of service.

Daniel Kahn Gillmor discovered that GnuPG treated keys with empty usage flags as being valid for all usages. (CVE-2013-4351)

Taylor R Campbell discovered that GnuPG incorrectly handled certain OpenPGP messages. If a user or automated system were tricked into processing a specially crafted message, GnuPG could consume resources, resulting in a denial of service. (CVE-2013-4402).

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

ID	Name	Product	Family	Severity
111049	OracleVM 3.3 / 3.4 : gnupg2 (OVMSA-2018-0239)	Nessus	OracleVM Local Security Checks	high
88872	F5 Networks BIG-IP : GnuPG vulnerability (K50413110)	Nessus	F5 Networks Local Security Checks	medium
80627	Oracle Solaris Third-Party Patch Update : gnupg (cve_2013_4351_cryptographic_issues)	Nessus	Solaris Local Security Checks	medium
75157	openSUSE Security Update : gpg2 (openSUSE-SU-2013:1526-1)	Nessus	SuSE Local Security Checks	medium
75147	openSUSE Security Update : gpg2 (openSUSE-SU-2013:1494-1)	Nessus	SuSE Local Security Checks	medium
72638	GLSA-201402-24 : GnuPG, Libgcrypt: Multiple vulnerabilities	Nessus	Gentoo Local Security Checks	medium
70899	Amazon Linux AMI : gnupg2 (ALAS-2013-237)	Nessus	Amazon Linux Local Security Checks	medium
70898	Amazon Linux AMI : gnupg (ALAS-2013-236)	Nessus	Amazon Linux Local Security Checks	medium
70861	Fedora 18 : gnupg-1.4.15-1.fc18 (2013-18647)	Nessus	Fedora Local Security Checks	medium
70635	CentOS 5 / 6 : gnupg2 (CESA-2013:1459)	Nessus	CentOS Local Security Checks	medium
70634	CentOS 5 : gnupg (CESA-2013:1458)	Nessus	CentOS Local Security Checks	medium
70631	SuSE 11.2 / 11.3 Security Update : gpg2 (SAT Patch Numbers 8426 / 8427)	Nessus	SuSE Local Security Checks	medium
70604	Scientific Linux Security Update : gnupg on SL5.x i386/x86_64 (20131024)	Nessus	Scientific Linux Local Security Checks	medium
70603	Scientific Linux Security Update : gnupg2 on SL5.x, SL6.x i386/x86_64 (20131024)	Nessus	Scientific Linux Local Security Checks	medium
70602	RHEL 5 / 6 : gnupg2 (RHSA-2013:1459)	Nessus	Red Hat Local Security Checks	high
70601	RHEL 5 : gnupg (RHSA-2013:1458)	Nessus	Red Hat Local Security Checks	medium
70598	Oracle Linux 5 / 6 : gnupg2 (ELSA-2013-1459)	Nessus	Oracle Linux Local Security Checks	high
70597	Oracle Linux 5 : gnupg (ELSA-2013-1458)	Nessus	Oracle Linux Local Security Checks	critical
70409	Fedora 19 : gnupg-1.4.15-1.fc19 (2013-18676)	Nessus	Fedora Local Security Checks	medium
70383	Mandriva Linux Security Advisory : gnupg (MDVSA-2013:247)	Nessus	Mandriva Local Security Checks	medium
70378	Fedora 20 : gnupg-1.4.15-1.fc20 (2013-18543)	Nessus	Fedora Local Security Checks	medium
70374	Debian DSA-2774-1 : gnupg2 - several vulnerabilities	Nessus	Debian Local Security Checks	medium
70373	Debian DSA-2773-1 : gnupg - several vulnerabilities	Nessus	Debian Local Security Checks	medium
70366	Ubuntu 10.04 LTS / 12.04 LTS / 12.10 / 13.04 : gnupg, gnupg2 vulnerabilities (USN-1987-1)	Nessus	Ubuntu Local Security Checks	medium

Detections

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CVE-2013-4351

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