Libgcrypt before 1.5.4, as used in GnuPG and other products, does not properly perform ciphertext normalization and ciphertext randomization, which makes it easier for physically proximate attackers to conduct key-extraction attacks by leveraging the ability to collect voltage data from exposed metal, a different vector than CVE-2013-4576.

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 Redhat Enterprise Linux 5 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 Redhat Enterprise Linux 6 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.

According to the versions of the libgcrypt package installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities :

  - Libgcrypt before 1.5.4, as used in GnuPG and other     products, does not properly perform ciphertext     normalization and ciphertext randomization, which makes     it easier for physically proximate attackers to conduct     key-extraction attacks by leveraging the ability to     collect voltage data from exposed metal, a different     vector than CVE-2013-4576.(CVE-2014-5270)

  - libgcrypt before version 1.7.8 is vulnerable to a cache     side-channel attack resulting into a complete break of     RSA-1024 while using the left-to-right method for     computing the sliding-window expansion. The same attack     is believed to work on RSA-2048 with moderately more     computation. This side-channel requires that attacker     can run arbitrary software on the hardware where the     private RSA key is used.(CVE-2017-7526)

  - 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 mpi_powm function in Libgcrypt before 1.6.3 and     GnuPG before 1.4.19 allows attackers to obtain     sensitive information by leveraging timing differences     when accessing a pre-computed table during modular     exponentiation, related to a 'Last-Level Cache     Side-Channel Attack.'(CVE-2015-0837)

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 versions of the libgcrypt package installed, the EulerOS Virtualization for ARM 64 installation on the remote host is affected by the following vulnerabilities :

  - Libgcrypt before 1.5.4, as used in GnuPG and other     products, does not properly perform ciphertext     normalization and ciphertext randomization, which makes     it easier for physically proximate attackers to conduct     key-extraction attacks by leveraging the ability to     collect voltage data from exposed metal, a different     vector than CVE-2013-4576.(CVE-2014-5270)

  - libgcrypt before version 1.7.8 is vulnerable to a cache     side-channel attack resulting into a complete break of     RSA-1024 while using the left-to-right method for     computing the sliding-window expansion. The same attack     is believed to work on RSA-2048 with moderately more     computation. This side-channel requires that attacker     can run arbitrary software on the hardware where the     private RSA key is used.(CVE-2017-7526)

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 versions of the libgcrypt packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - Libgcrypt before 1.5.4, as used in GnuPG and other     products, does not properly perform ciphertext     normalization and ciphertext randomization, which makes     it easier for physically proximate attackers to conduct     key-extraction attacks by leveraging the ability to     collect voltage data from exposed metal, a different     vector than CVE-2013-4576.(CVE-2014-5270)

  - libgcrypt before version 1.7.8 is vulnerable to a cache     side-channel attack resulting into a complete break of     RSA-1024 while using the left-to-right method for     computing the sliding-window expansion. The same attack     is believed to work on RSA-2048 with moderately more     computation. This side-channel requires that attacker     can run arbitrary software on the hardware where the     private RSA key is used.(CVE-2017-7526)

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.

Fix a side-channel attack on data-dependent timing variations in modular exponentiation, which can potentially lead to an information leak. (CVE-2015-0837)

Fix a side-channel attack which can potentially lead to an information leak. (CVE-2014-3591)

Libgcrypt before 1.5.4, as used in GnuPG and other products, does not properly perform ciphertext normalization and ciphertext randomization, which makes it easier for physically proximate attackers to conduct key-extraction attacks by leveraging the ability to collect voltage data from exposed metal, a different vector than CVE-2013-4576 , which was fixed in ALAS-2014-278. (CVE-2014-5270)

The remote Ubuntu 14.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-2554-1 advisory.

    Daniel Genkin, Lev Pachmanov, Itamar Pipman, and Eran Tromer discovered that GnuPG was susceptible to an     attack via physical side channels. A local attacker could use this attack to possibly recover private     keys. (CVE-2014-3591)

    Daniel Genkin, Adi Shamir, and Eran Tromer discovered that GnuPG was susceptible to an attack via physical     side channels. A local attacker could use this attack to possibly recover private keys. (CVE-2015-0837)

    Hanno Bck discovered that GnuPG incorrectly handled certain malformed keyrings. If a user or automated     system were tricked into opening a malformed keyring, a remote attacker could use this issue to cause     GnuPG to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2015-1606,     CVE-2015-1607)

    In addition, this update improves GnuPG security by validating that the keys returned by keyservers match     those requested.

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.

Updated gnupg, gnupg2 and libgcrypt packages fix security vulnerabilities :

GnuPG versions before 1.4.17 and 2.0.24 are vulnerable to a denial of service which can be caused by garbled compressed data packets which may put gpg into an infinite loop (CVE-2014-4617).

The libgcrypt library before version 1.5.4 is vulnerable to an ELGAMAL side-channel attack (CVE-2014-5270).

GnuPG before 1.4.19 is vulnerable to a side-channel attack which can potentially lead to an information leak (CVE-2014-3591).

GnuPG before 1.4.19 is vulnerable to a side-channel attack on data-dependent timing variations in modular exponentiation, which can potentially lead to an information leak (CVE-2015-0837).

The gnupg and gnupg2 package has been patched to correct these issues.

GnuPG2 is vulnerable to these issues through the libgcrypt library.
The issues were fixed in libgcrypt 1.6.3. The libgcrypt package in Mandriva, at version 1.5.4, was only vulnerable to the CVE-2014-3591 issue. It has also been patched to correct this issue.

Daniel Genkin, Itamar Pipman and Eran Tromer discovered that Elgamal encryption subkeys in applications using the libgcrypt11 library, for example GnuPG 2.x, could be leaked via a side-channel attack (see http://www.cs.tau.ac.il/~tromer/handsoff/).

This is fixed in Squeeze in version 1.4.5-2+squeeze2.

We recommend that you upgrade your libgcrypt11 packages.

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

Daniel Genkin, Itamar Pipman and Eran Tromer discovered that Elgamal encryption subkeys in applications using the libgcrypt11 library, for example GnuPG 2.x, could be leaked via a side-channel attack.

Updated gnupg packages fix security vulnerability :

The gnupg program before version 1.4.16 is vulnerable to an ELGAMAL side-channel attack (CVE-2014-5270).

Genkin, Pipman and Tromer discovered a side-channel attack on Elgamal encryption subkeys (CVE-2014-5270 ).

In addition, this update hardens GnuPG's behaviour when treating keyserver responses; GnuPG now filters keyserver responses to only accepts those keyid's actually requested by the user.

Updated libgcrypt packages fix security vulnerability :

The libgcrypt library before version 1.5.4 is vulnerable to an ELGAMAL side-channel attack (CVE-2014-5270).

The remote Ubuntu 14.04 LTS host has packages installed that are affected by a vulnerability as referenced in the USN-2339-2 advisory.

    Daniel Genkin, Adi Shamir, and Eran Tromer discovered that Libgcrypt was susceptible to an adaptive chosen     ciphertext attack via physical side channels. A local attacker could use this attack to possibly recover     private keys.

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.

Daniel Genkin, Adi Shamir, and Eran Tromer discovered that GnuPG was susceptible to an adaptive chosen ciphertext attack via physical side channels. A local attacker could use this attack to possibly recover private keys.

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.

This libgcrypt update fixes the following security issue :

  - Side-channel attack on Elgamal encryption subkeys.
    (CVE-2014-5270). (bnc#892464)

The remote host is affected by the vulnerability described in GLSA-201408-10 (Libgcrypt: Side-channel attack)

    A vulnerability in the implementation of ElGamal decryption procedures       of Libgcrypt leaks information to various side-channels.
  Impact :

    A physical side-channel attack allows a remote attacker to fully extract       decryption keys during the decryption of a chosen ciphertext.
  Workaround :

    There is no known workaround at this time.

ID	Name	Product	Family	Severity
198980	RHEL 7 : gnupg (Unpatched Vulnerability)	Nessus	Red Hat Local Security Checks	high
198886	RHEL 5 : gnupg (Unpatched Vulnerability)	Nessus	Red Hat Local Security Checks	high
198874	RHEL 6 : gnupg (Unpatched Vulnerability)	Nessus	Red Hat Local Security Checks	high
135660	EulerOS Virtualization 3.0.2.2 : libgcrypt (EulerOS-SA-2020-1498)	Nessus	Huawei Local Security Checks	medium
134478	EulerOS Virtualization for ARM 64 3.0.2.0 : libgcrypt (EulerOS-SA-2020-1189)	Nessus	Huawei Local Security Checks	medium
130667	EulerOS 2.0 SP5 : libgcrypt (EulerOS-SA-2019-2205)	Nessus	Huawei Local Security Checks	medium
129199	EulerOS 2.0 SP3 : libgcrypt (EulerOS-SA-2019-2006)	Nessus	Huawei Local Security Checks	medium
126877	EulerOS 2.0 SP2 : libgcrypt (EulerOS-SA-2019-1750)	Nessus	Huawei Local Security Checks	medium
85232	Amazon Linux AMI : libgcrypt (ALAS-2015-577)	Nessus	Amazon Linux Local Security Checks	medium
82526	Ubuntu 14.04 LTS : GnuPG vulnerabilities (USN-2554-1)	Nessus	Ubuntu Local Security Checks	medium
82407	Mandriva Linux Security Advisory : gnupg (MDVSA-2015:154)	Nessus	Mandriva Local Security Checks	medium
82238	Debian DLA-93-1 : libgcrypt11 security update	Nessus	Debian Local Security Checks	low
79255	Debian DSA-3073-1 : libgcrypt11 - security update	Nessus	Debian Local Security Checks	low
77802	Mandriva Linux Security Advisory : gnupg (MDVSA-2014:180)	Nessus	Mandriva Local Security Checks	low
77671	Debian DSA-3024-1 : gnupg - security update	Nessus	Debian Local Security Checks	low
77655	Mandriva Linux Security Advisory : libgcrypt (MDVSA-2014:176)	Nessus	Mandriva Local Security Checks	low
77527	Ubuntu 14.04 LTS : Libgcrypt vulnerability (USN-2339-2)	Nessus	Ubuntu Local Security Checks	high
77526	Ubuntu 10.04 LTS / 12.04 LTS : gnupg vulnerability (USN-2339-1)	Nessus	Ubuntu Local Security Checks	low
77472	SuSE 11.3 Security Update : libgcrypt (SAT Patch Number 9646)	Nessus	SuSE Local Security Checks	low
77454	GLSA-201408-10 : Libgcrypt: Side-channel attack	Nessus	Gentoo Local Security Checks	low

Detections

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CVE-2014-5270

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Tenable Plugins

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