lib/Crypto/PublicKey/ElGamal.py in PyCrypto through 2.6.1 generates weak ElGamal key parameters, which allows attackers to obtain sensitive information by reading ciphertext data (i.e., it does not have semantic security in face of a ciphertext-only attack). The Decisional Diffie-Hellman (DDH) assumption does not hold for PyCrypto's ElGamal implementation.

It is, therefore, affected by a vulnerability as referenced in the ALAS2023-2025-1051 advisory.

    lib/Crypto/PublicKey/ElGamal.py in PyCrypto through 2.6.1 generates weak ElGamal key parameters, which     allows attackers to obtain sensitive information by reading ciphertext data (i.e., it does not have     semantic security in face of a ciphertext-only attack). The Decisional Diffie-Hellman (DDH) assumption     does not hold for PyCrypto's ElGamal implementation. (CVE-2018-6594)

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

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

It is, therefore, affected by a vulnerability as referenced in the ALAS2ANSIBLE2-2025-012 advisory.

    lib/Crypto/PublicKey/ElGamal.py in PyCrypto through 2.6.1 generates weak ElGamal key parameters, which     allows attackers to obtain sensitive information by reading ciphertext data (i.e., it does not have     semantic security in face of a ciphertext-only attack). The Decisional Diffie-Hellman (DDH) assumption     does not hold for PyCrypto's ElGamal implementation. (CVE-2018-6594)

Tenable has extracted the preceding description block directly from the tested product 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 Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - lib/Crypto/PublicKey/ElGamal.py in PyCrypto through 2.6.1 generates weak ElGamal key parameters, which     allows attackers to obtain sensitive information by reading ciphertext data (i.e., it does not have     semantic security in face of a ciphertext-only attack). The Decisional Diffie-Hellman (DDH) assumption     does not hold for PyCrypto's ElGamal implementation. (CVE-2018-6594)

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

An update of the pycrypto package has been released.

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

  - lib/Crypto/PublicKey/ElGamal.py in PyCrypto through     2.6.1 generates weak ElGamal key parameters, which     allows attackers to obtain sensitive information by     reading ciphertext data (i.e., it does not have     semantic security in face of a ciphertext-only attack).
    The Decisional Diffie-Hellman (DDH) assumption does not     hold for PyCrypto's ElGamal     implementation.(CVE-2018-6594)

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 python-crypto package installed, the EulerOS Virtualization for ARM 64 installation on the remote host is affected by the following vulnerability :

  - lib/Crypto/PublicKey/ElGamal.py in PyCrypto through     2.6.1 generates weak ElGamal key parameters, which     allows attackers to obtain sensitive information by     reading ciphertext data (i.e., it does not have     semantic security in face of a ciphertext-only attack).
    The Decisional Diffie-Hellman (DDH) assumption does not     hold for PyCrypto's ElGamal     implementation.(CVE-2018-6594)

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 python-crypto package installed, the EulerOS installation on the remote host is affected by the following vulnerability :

  - lib/Crypto/PublicKey/ElGamal.py in PyCrypto through     2.6.1 generates weak ElGamal key parameters, which     allows attackers to obtain sensitive information by     reading ciphertext data (i.e., it does not have     semantic security in face of a ciphertext-only attack).
    The Decisional Diffie-Hellman (DDH) assumption does not     hold for PyCrypto's ElGamal     implementation.(CVE-2018-6594)

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 python-crypto package installed, the EulerOS Virtualization for ARM 64 installation on the remote host is affected by the following vulnerabilities :

  - Heap-based buffer overflow in the ALGnew function in     block_templace.c in Python Cryptography Toolkit (aka     pycrypto) allows remote attackers to execute arbitrary     code as demonstrated by a crafted iv parameter to     cryptmsg.py.(CVE-2013-7459)

  - lib/Crypto/PublicKey/ElGamal.py in PyCrypto through     2.6.1 generates weak ElGamal key parameters, which     allows attackers to obtain sensitive information by     reading ciphertext data (i.e., it does not have     semantic security in face of a ciphertext-only attack).
    The Decisional Diffie-Hellman (DDH) assumption does not     hold for PyCrypto's ElGamal     implementation.(CVE-2018-6594)

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.

The remote host is affected by the vulnerability described in GLSA-202007-62 (PyCrypto: Weak key generation)

    It was discovered that PyCrypto incorrectly generated ElGamal key       parameters.
  Impact :

    Attackers may be able to obtain sensitive information by reading       ciphertext data.
  Workaround :

    There is no known workaround at this time.

The remote Ubuntu 14.04 LTS / 16.04 LTS host has packages installed that are affected by a vulnerability as referenced in the USN-3616-1 advisory.

    It was discovered that Python Crypto incorrectly generated ElGamal key parameters. A remote attacker could     possibly use this issue to obtain sensitive information.

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.

Weak ElGamal key parameters in PublicKey/ElGamal.py allow attackers to obtain sensitive information by reading ciphertext :

lib/Crypto/PublicKey/ElGamal.py in PyCrypto through 2.6.1 generates weak ElGamal key parameters, which allows attackers to obtain sensitive information by reading ciphertext data (i.e., it does not have semantic security in face of a ciphertext-only attack). The Decisional Diffie-Hellman (DDH) assumption does not hold for PyCrypto's ElGamal implementation. (CVE-2018-6594)

The textbook ElGamal implementation is not secure. PyCrypto and some other implementations use the wrong algorithm, which may lead to some information disclosure simply by looking at the encrypted text. For a full description, see https://github.com/dlitz/pycrypto/issues/253

This update includes a fix for this problem backported from pycryptodome.

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	Type	Severity
241777	Amazon Linux 2023 : python3-crypto (ALAS2023-2025-1051)	Nessus	Amazon Linux Local Security Checks	Local	high
232226	Amazon Linux 2 : python-crypto (ALASANSIBLE2-2025-012)	Nessus	Amazon Linux Local Security Checks	Local	high
222694	Linux Distros Unpatched Vulnerability : CVE-2018-6594	Nessus	Misc.	Local	high
203059	Photon OS 2.0: Pycrypto PHSA-2018-2.0-0037	Nessus	PhotonOS Local Security Checks	Local	high
151411	EulerOS Virtualization 3.0.2.2 : python-crypto (EulerOS-SA-2021-2160)	Nessus	Huawei Local Security Checks	Local	high
151301	EulerOS Virtualization for ARM 64 3.0.2.0 : python-crypto (EulerOS-SA-2021-2118)	Nessus	Huawei Local Security Checks	Local	high
149122	EulerOS 2.0 SP3 : python-crypto (EulerOS-SA-2021-1836)	Nessus	Huawei Local Security Checks	Local	high
147092	EulerOS Virtualization 3.0.6.6 : python-crypto (EulerOS-SA-2021-1513)	Nessus	Huawei Local Security Checks	Local	high
146674	EulerOS 2.0 SP2 : python-crypto (EulerOS-SA-2021-1351)	Nessus	Huawei Local Security Checks	Local	high
144228	EulerOS 2.0 SP5 : python-crypto (EulerOS-SA-2020-2562)	Nessus	Huawei Local Security Checks	Local	high
140944	EulerOS Virtualization for ARM 64 3.0.6.0 : python-crypto (EulerOS-SA-2020-1996)	Nessus	Huawei Local Security Checks	Local	critical
139270	GLSA-202007-62 : PyCrypto: Weak key generation	Nessus	Gentoo Local Security Checks	Local	high
121827	Photon OS 1.0: Pycrypto PHSA-2018-1.0-0126	Nessus	PhotonOS Local Security Checks	Local	high
108833	Ubuntu 14.04 LTS / 16.04 LTS : Python Crypto vulnerability (USN-3616-1)	Nessus	Ubuntu Local Security Checks	Local	high
108602	Amazon Linux AMI : python-crypto (ALAS-2018-977)	Nessus	Amazon Linux Local Security Checks	Local	high
107155	Fedora 26 : python-crypto (2018-0c75cc72bc)	Nessus	Fedora Local Security Checks	Local	high
107033	Fedora 27 : python-crypto (2018-913c225b49)	Nessus	Fedora Local Security Checks	Local	high

Detections

Analytics

CVE-2018-6594

high

Tenable Plugins

high

high

high

high

high

high

high

high

high

high

critical

high

high

high

high

high

high