dovecot -- Buffer overflow reading extension header

Aki Tuomi reports: Vulnerability Details: When reading FTS or POP3-UIDL header from dovecot index, the input buffer size is not bound, and data is copied to target structure causing stack overflow. Risk: This can be used for local root privilege escalation or executing arbitrary code in dovecot...

USN-3855-1: systemd vulnerabilities | Cloud Foundry

Severity High Vendor Canonical Ubuntu Versions Affected Canonical Ubuntu 16.04 Canonical Ubuntu 18.04 Description It was discovered that systemd-journald allocated variable-length buffers for certain message fields on the stack. A local attacker could potentially exploit this to cause a denial of...

Internet Bug Bounty: Heap-buffer-overflow in Perl__byte_dump_string (utf8.c) could lead to memory leak

With crafted regex match, I have found a heap-over-flow in function Perlbytedumpstring, which would lead to memory leak. Reported to the Perl security mailing list on 11 Sep 2017. Confirmed as a security flaw by TonyC on 24 Feb 2018 CVE-2018-6797 assigned to this flaw on 7 Feb 2018 Public securit...

Linux: Address space layout randomization (ASLR) status

Address space layout randomization ASLR is an exploit mitigation technique which randomly arranges the address space of key data areas of a process. SPDX-FileCopyrightText: 2019 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective...

Updated libvncserver & x11vnc packages fix security vulnerabilities

A heap use-after-free vulnerability in the server code of the file transfer extension, which can result in remote code execution. This attack appears to be exploitable via network connectivity CVE-2018-6307. A heap use-after-free vulnerability in the server code of the file transfer extension,...

ASLR Bypass

kernel-rt is vulnerable to ASLR bypass attacks. The vulnerability exists as the archpickmmaplayout function in arch/x86/mm/mmap.c in the Linux kernel through 4.5.2 does not properly randomize the legacy base address, which makes it easier for local users to defeat the intended restrictions on the...

ASLR Bypass

kernel-rt is vulnerable to ASLR bypass attacks. The vulnerability exists as the vdsoaddr function in arch/x86/vdso/vma.c in the Linux kernel through 3.18.2 does not properly choose memory locations for the vDSO area, which makes it easier for local users to bypass the ASLR protection mechanism by...

Ubuntu 16.04 LTS / 18.04 LTS : systemd vulnerabilities (USN-3855-1)

The remote Ubuntu 16.04 LTS / 18.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-3855-1 advisory. It was discovered that systemd-journald allocated variable-length buffers for certain message fields on the stack. A local attacker could...

Ubuntu: Security Advisory (USN-3855-1)

The remote host is missing an update for the 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...

USN-3855-1: systemd vulnerabilities

It was discovered that systemd-journald allocated variable-length buffers for certain message fields on the stack. A local attacker could potentially exploit this to cause a denial of service, or execute arbitrary code. CVE-2018-16864 It was discovered that systemd-journald allocated...

libzmq4 -- Remote Code Execution Vulnerability

A vulnerability has been found that would allow attackers to direct a peer to jump to and execute from an address indicated by the attacker. This issue has been present since v4.2.0. Older releases are not affected. NOTE: The attacker needs to know in advance valid addresses in the peer's memory ...

Linux/x64 - Disable ASLR Security Shellcode (93 Bytes)

/ ASLR Address Space Layout Randomization Disable Shellcode Language C & ASM - Linux/x8664 Author : Kağan Çapar contact: email protected shellcode len : 93 bytes compilation: gcc -fno-stack-protector -z execstack .c -o Test: run shellcode ./aslr etc. check : cat /proc/sys/kernel/randomizevaspace...

Valve: RCE on Steam Client via buffer overflow in Server Info

Introduction In Steam and other valve games CSGO, Half-Life, TF2 there is a functionality to find game servers called the server browser. In order to retrieve the information about these servers the server browser communicates with a specific UDP protocol called server queries. The protocol is we...

CVE-2018-20023

LibVNC before 8b06f835e259652b0ff026898014fc7297ade858 contains CWE-665: Improper Initialization vulnerability in VNC Repeater client code that allows attacker to read stack memory and can be abuse for information disclosure. Combined with another vulnerability, it can be used to leak stack memor...

CVE-2018-20022

LibVNC before 2f5b2ad1c6c99b1ac6482c95844a84d66bb52838 contains multiple weaknesses CWE-665: Improper Initialization vulnerability in VNC client code that allows attacker to read stack memory and can be abuse for information disclosure. Combined with another vulnerability, it can be used to leak...

CVE-2018-20022

LibVNC before 2f5b2ad1c6c99b1ac6482c95844a84d66bb52838 contains multiple weaknesses CWE-665: Improper Initialization vulnerability in VNC client code that allows attacker to read stack memory and can be abuse for information disclosure. Combined with another vulnerability, it can be used to leak...

CVE-2018-20023

LibVNC before 8b06f835e259652b0ff026898014fc7297ade858 contains CWE-665: Improper Initialization vulnerability in VNC Repeater client code that allows attacker to read stack memory and can be abuse for information disclosure. Combined with another vulnerability, it can be used to leak stack memor...

DEBIAN-CVE-2018-20023

LibVNC before 8b06f835e259652b0ff026898014fc7297ade858 contains CWE-665: Improper Initialization vulnerability in VNC Repeater client code that allows attacker to read stack memory and can be abuse for information disclosure. Combined with another vulnerability, it can be used to leak stack memor...

CVE-2018-20022

LibVNC before 2f5b2ad1c6c99b1ac6482c95844a84d66bb52838 contains multiple weaknesses CWE-665: Improper Initialization vulnerability in VNC client code that allows attacker to read stack memory and can be abuse for information disclosure. Combined with another vulnerability, it can be used to leak...

Information disclosure

LibVNC before 8b06f835e259652b0ff026898014fc7297ade858 contains CWE-665: Improper Initialization vulnerability in VNC Repeater client code that allows attacker to read stack memory and can be abuse for information disclosure. Combined with another vulnerability, it can be used to leak stack memor...