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CVE-2018-18509

Status Candidate

Overview

A flaw during verification of certain S/MIME signatures causes emails to be shown in Thunderbird as having a valid digital signature, even if the shown message contents aren't covered by the signature. The flaw allows an attacker to reuse a valid S/MIME signature to craft an email message with arbitrary content. This vulnerability affects Thunderbird < 60.5.1.

Related Files

Johnny You Are Fired
Posted May 1, 2019
Authored by Juraj Somorovsky, Jorg Schwenk, Sebastian Schinzel, Damian Poddebniak, Hanno Bock, Jens Muller, Marcus Brinkmann

This archive contains proof of concepts and a whitepaper that describes multiple email client implementations where popular clients for email are vulnerable to signature spoofing attacks.

tags | exploit, paper, spoof, proof of concept
advisories | CVE-2017-17848, CVE-2018-12019, CVE-2018-12020, CVE-2018-12356, CVE-2018-12556, CVE-2018-15586, CVE-2018-15587, CVE-2018-15588, CVE-2018-18509, CVE-2019-8338
SHA-256 | 3356c7f94ef68ddc7268602c64a93e10fbaff874992374b51f89d7cf87f71a0c
Gentoo Linux Security Advisory 201904-07
Posted Apr 2, 2019
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory 201904-7 - Multiple vulnerabilities have been found in Mozilla Thunderbird and Firefox, the worst of which could lead to the execution of arbitrary code. Versions less than 60.6.1 are affected.

tags | advisory, arbitrary, vulnerability
systems | linux, gentoo
advisories | CVE-2016-5824, CVE-2018-18335, CVE-2018-18356, CVE-2018-18500, CVE-2018-18501, CVE-2018-18505, CVE-2018-18506, CVE-2018-18509, CVE-2018-18512, CVE-2018-18513, CVE-2019-5785, CVE-2019-9788, CVE-2019-9790, CVE-2019-9791, CVE-2019-9792, CVE-2019-9793, CVE-2019-9795, CVE-2019-9796, CVE-2019-9810, CVE-2019-9813
SHA-256 | ec2b4c986dbf5c17d16fcedf5271919bfa322a9fb6071ad4b87d3415b399efbc
Ubuntu Security Notice USN-3897-1.t.xt
Posted Feb 27, 2019
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3897-1 - A use-after-free was discovered in libical. If a user were tricked in to opening a specially crafted ICS calendar file, an attacker could potentially exploit this to cause a denial of service. Multiple security issues were discovered in Thunderbird. If a user were tricked in to opening a specially crafted message, an attacker could potentially exploit these to cause a denial of service, or execute arbitrary code. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary
systems | linux, ubuntu
advisories | CVE-2016-5824, CVE-2018-18509
SHA-256 | b874881641fd7509c472416c48d3b2ffe94626ff3840fa1538992148440c2484
Debian Security Advisory 4392-1
Posted Feb 18, 2019
Authored by Debian | Site debian.org

Debian Linux Security Advisory 4392-1 - Multiple security issues have been found in the Thunderbird mail client, which could lead to the execution of arbitrary code, denial of service or spoofing of S/MIME signatures.

tags | advisory, denial of service, arbitrary, spoof
systems | linux, debian
advisories | CVE-2018-18356, CVE-2018-18500, CVE-2018-18501, CVE-2018-18505, CVE-2018-18509, CVE-2019-5785
SHA-256 | 4c871fbac5c3ba2c4e1350c97e650c929c2ea4bcb6654865928a2d98f8192768
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