USN-6780-1 python-idna vulnerability

Guido Vranken discovered that idna did not properly manage certain inputs, which could lead to significant resource consumption. An attacker could possibly use this issue to cause a denial of service...

Internet Bug Bounty: CVE-2019-1551: rsaz_512_sqr overflow bug on x86_64

The CVE-2019-1551 vulnerability was an overflow bug in the x6464 Montgomery squaring procedure used in exponentiation with 512-bit moduli in the OpenSSL library. The vulnerability was found and reported by researchers. The issue was mitigated in the 1.1.1 and 1.0.2 versions of OpenSSL...

Critical RCE Bug Affects Millions of OpenWrt-based Network Devices

A cybersecurity researcher today disclosed technical details and proof-of-concept of a critical remote code execution vulnerability affecting OpenWrt , a widely used Linux-based operating system for routers, residential gateways, and other embedded devices that route network traffic. Tracked as...

Debian: Security Advisory (DSA-4594-1)

The remote host is missing an update for the Debian SPDX-FileCopyrightText: 2019 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only ifdescription...

Vulnerability in OpenSSL - rsaz_512_sqr overflow bug on x86_64

There is an overflow bug in the x8664 Montgomery squaring procedure used in exponentiation with 512-bit moduli. No EC algorithms are affected. Analysis suggests that attacks against 2-prime RSA1024, 3-prime RSA1536, and DSA1024 as a result of this defect would be very difficult to perform and are...

Vulnerability in OpenSSL - Client DoS due to large DH parameter

During key agreement in a TLS handshake using a DHE based ciphersuite a malicious server can send a very large prime value to the client. This will cause the client to spend an unreasonably long period of time generating a key for this prime resulting in a hang until the client has finished. This...

Ubuntu 14.04 LTS / 16.04 LTS : OpenSSH vulnerabilities (USN-3538-1)

The remote Ubuntu 14.04 LTS / 16.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-3538-1 advisory. Jann Horn discovered that OpenSSH incorrectly loaded PKCS11 modules from untrusted directories. A remote attacker could possibly use this iss...

Important: Red Hat Security Advisory: freeradius security update

An update for freeradius 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 fro...

Debian DSA-3900-1 : openvpn - security update

Several issues were discovered in openvpn, a virtual private network application. - CVE-2017-7479 It was discovered that openvpn did not properly handle the rollover of packet identifiers. This would allow an authenticated remote attacker to cause a denial-of-service via application crash. -...

Debian Security Advisory DSA 3900-1 (openvpn - security update)

Several issues were discovered in openvpn, a virtual private network application. CVE-2017-7479 It was discovered that openvpn did not properly handle the rollover of packet identifiers. This would allow an authenticated remote attacker to cause a denial-of-service via application crash...

RPCBind / libtirpc Denial Of Service

!/usr/bin/ruby Source: https://raw.githubusercontent.com/guidovranken/rpcbomb/fe53048af2d4fb78c911e71a30f21afcffbbf5e1/rpcbomb.rb By Guido Vranken https://guidovranken.wordpress.com/ Thanks to Sean Verity for writing an exploit in Ruby for an earlier vulnerability:...

RPCBind / libtirpc - Denial of Service

!/usr/bin/ruby Source: https://raw.githubusercontent.com/guidovranken/rpcbomb/fe53048af2d4fb78c911e71a30f21afcffbbf5e1/rpcbomb.rb By Guido Vranken https://guidovranken.wordpress.com/ Thanks to Sean Verity for writing an exploit in Ruby for an earlier vulnerability:...

RPCBind libtirpc - Denial of Service

RPCBind libtirpc - Denial of Service !/usr/bin/ruby Source: https://raw.githubusercontent.com/guidovranken/rpcbomb/fe53048af2d4fb78c911e71a30f21afcffbbf5e1/rpcbomb.rb By Guido Vranken https://guidovranken.wordpress.com/ Thanks to Sean Verity for writing an exploit in Ruby for an earlier...

Vulnerability in OpenSSL - Bad (EC)DHE parameters cause a client crash

If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. Found by Guido Vranken...

Vulnerability in OpenSSL - Pointer arithmetic undefined behaviour

Avoid some undefined pointer arithmetic A common idiom in the codebase is to check limits in the following manner: “p + len limit” Where “p” points to some malloc’d data of SIZE bytes and limit == p + SIZE “len” here could be from some externally supplied data e.g. from a TLS message. The rules o...

Ubuntu: Security Advisory (USN-2959-1)

The remote host is missing an update for the SPDX-FileCopyrightText: 2016 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only ifdescription...

Vulnerability in OpenSSL - EBCDIC overread

ASN1 Strings that are over 1024 bytes can cause an overread in applications using the X509NAMEoneline function on EBCDIC systems. This could result in arbitrary stack data being returned in the buffer. Found by Guido Vranken...

Vulnerability in OpenSSL - EVP_EncodeUpdate overflow

An overflow can occur in the EVPEncodeUpdate function which is used for Base64 encoding of binary data. If an attacker is able to supply very large amounts of input data then a length check can overflow resulting in a heap corruption. Internally to OpenSSL the EVPEncodeUpdate function is primarly...

USN-2914-1 OpenSSL vulnerabilities | Cloud Foundry

USN-2914-1 OpenSSL vulnerabilities Low Vendor Ubuntu, OpenSSL Versions Affected Ubuntu 14.04 LTS SSLv1 Description Several security issues were fixed in OpenSSL. Yuval Yarom, Daniel Genkin, and Nadia Heninger discovered that OpenSSL was vulnerable to a side-channel attack on modular exponentiatio...

Vulnerability in OpenSSL - Fix memory issues in BIO_*printf functions

The internal |fmtstr| function used in processing a “%s” format string in the BIOprintf functions could overflow while calculating the length of a string and cause an OOB read when printing very long strings. Additionally the internal |doaproutch| function can attempt to write to an OOB memory...