CVE-2017-8823

CVE-2017-8823 (Tor) : A use-after-free in onion service v2 during intro-point expiration is caused by mismanagement of the expiring list in certain error cases (Tor before 0.3.1.9). Descriptions from Arch Linux ASA-201712-10 indicate this can lead to crashes of v2 onion services when circuits exp...

CVE-2017-8820

In Tor before 0.2.5.16, 0.2.6 through 0.2.8 before 0.2.8.17, 0.2.9 before 0.2.9.14, 0.3.0 before 0.3.0.13, and 0.3.1 before 0.3.1.9, remote attackers can cause a denial of service NULL pointer dereference and application crash against directory authorities via a malformed descriptor, aka...

CVE-2017-8823

In Tor before 0.2.5.16, 0.2.6 through 0.2.8 before 0.2.8.17, 0.2.9 before 0.2.9.14, 0.3.0 before 0.3.0.13, and 0.3.1 before 0.3.1.9, there is a use-after-free in onion service v2 during intro-point expiration because the expiring list is mismanaged in certain error cases, aka TROVE-2017-013...

CVE-2017-8819

In Tor before 0.2.5.16, 0.2.6 through 0.2.8 before 0.2.8.17, 0.2.9 before 0.2.9.14, 0.3.0 before 0.3.0.13, and 0.3.1 before 0.3.1.9, the replay-cache protection mechanism is ineffective for v2 onion services, aka TROVE-2017-009. An attacker can send many INTRODUCE2 cells to trigger this issue...

CVE-2017-8823

In Tor before 0.2.5.16, 0.2.6 through 0.2.8 before 0.2.8.17, 0.2.9 before 0.2.9.14, 0.3.0 before 0.3.0.13, and 0.3.1 before 0.3.1.9, there is a use-after-free in onion service v2 during intro-point expiration because the expiring list is mismanaged in certain error cases, aka TROVE-2017-013...

CVE-2017-8821

In Tor before 0.2.5.16, 0.2.6 through 0.2.8 before 0.2.8.17, 0.2.9 before 0.2.9.14, 0.3.0 before 0.3.0.13, and 0.3.1 before 0.3.1.9, an attacker can cause a denial of service application hang via crafted PEM input that signifies a public key requiring a password, which triggers an attempt by the...

CVE-2017-8820

In Tor before 0.2.5.16, 0.2.6 through 0.2.8 before 0.2.8.17, 0.2.9 before 0.2.9.14, 0.3.0 before 0.3.0.13, and 0.3.1 before 0.3.1.9, remote attackers can cause a denial of service NULL pointer dereference and application crash against directory authorities via a malformed descriptor, aka...

DSA-4054-1 tor - security update

Bulletin has no description...

OPENSUSE-SU-2017:3201-1 Security update for tor

This update for tor fixes vulnerabilities that allowed some traffic confirmation, DoS and other attacks bsc1070849: - CVE-2017-8819: Replay-cache ineffective for v2 onion services - CVE-2017-8820: Remote DoS attack against directory authorities - CVE-2017-8821: An attacker can make Tor ask for a...

OPENSUSE-SU-2017:3203-1 Security update for tor

This update for tor fixes vulnerabilities that allowed some traffic confirmation, DoS and other attacks bsc1070849: - CVE-2017-8819: Replay-cache ineffective for v2 onion services - CVE-2017-8820: Remote DoS attack against directory authorities - CVE-2017-8821: An attacker can make Tor ask for a...

Tor: De-anonymization by visiting specially crafted bookmark.

There is a way to import logs in 'about:memory' from local disk, however, tested on windows you can pass a network url that may point to attack controlled server which logs IP's. This connection is done by windows presumably and so doesn't hide real IP of Tor user. 1. Have victim drag and drop an...

Debian: Security Advisory (DSA-4054-1)

The remote host is missing an update for the Debian SPDX-FileCopyrightText: 2017 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...

tor -- Use-after-free in onion service v2

The Torproject.org reports: TROVE-2017-009: Replay-cache ineffective for v2 onion services TROVE-2017-010: Remote DoS attack against directory authorities TROVE-2017-011: An attacker can make Tor ask for a password TROVE-2017-012: Relays can pick themselves in a circuit path TROVE-2017-013:...

Linux Memory Cryptographic Keys Extractor: CryKeX

Some work has been already published regarding the subject of cryptograhic keys security within DRAM. Basically, we need to find something that looks like a key entropic and specific length and then confirm its nature by analyzing the memory structure around it C data types. The idea is to dump...

Tor Browser Bundle Detection (Linux/Unix SSH Login)

Detection of presence of Tor Browser Bundle. The script logs in via ssh, searches for executable SPDX-FileCopyrightText: 2017 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-onl...

OnionShare - Securely and anonymously share a file of any size

OnionShare lets you securely and anonymously share files of any size. It works by starting a web server, making it accessible as a Tor onion service, and generating an unguessable URL to access and download the files. It doesn't require setting up a server on the internet somewhere or using a thi...

Network Interference Detection Tool: ooniprobe

OONI, the Open Observatory of Network Interference, is a global observation network which aims is to collect high quality data using open methodologies, using Free and Open Source Software FL/OSS to share observations and data about the various types, methods, and amounts of network tampering in...

A week in security (November 6 – November 12)

After coming out victorious in a case against PUPs, Malwarebytes CEO Marcin Kleczynski has this to say: We fought for our users and we won. -- Marcin Kleczynski @mkleczynski November 9, 2017 And my, do we feel like champions! You can read more about this here. Last week, we looked into the...

tor/oss-fuzz-consensus: Heap-buffer-overflow in mock_crypto_pk_public_checksig__nocheck

Project: https://git.torproject.org/tor.git Detailed report: https://oss-fuzz.com/testcase?key=5170904637112320 Project: tor Fuzzer: libFuzzertoross-fuzz-consensus Fuzz target binary: oss-fuzz-consensus Job Type: libfuzzerasantor Platform Id: linux Crash Type: Heap-buffer-overflow WRITE Crash...

Threatpost News Wrap Podcast for Nov. 10

Threatpost editors Mike Mimoso and Tom Spring discuss the week’s information security news, including Chris Valasek’s and Charlie Miller’s return to the security speaking rounds, a phony WhatsApp download pulled from Google Play, a deep dive into the recent cloud-based storage leaks, and the rece...