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CVE-2021-29949

Status Candidate

Overview

When loading the shared library that provides the OTR protocol implementation, Thunderbird will initially attempt to open it using a filename that isn't distributed by Thunderbird. If a computer has already been infected with a malicious library of the alternative filename, and the malicious library has been copied to a directory that is contained in the search path for executable libraries, then Thunderbird will load the incorrect library. This vulnerability affects Thunderbird < 78.9.1.

Related Files

Ubuntu Security Notice USN-4995-2
Posted Jun 25, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4995-2 - USN-4995-1 fixed vulnerabilities in Thunderbird. This update provides the corresponding updates for Ubuntu 18.04 LTS. Multiple security issues were discovered in Thunderbird. If a user were tricked into opening a specially crafted website in a browsing context, an attacker could potentially exploit these to cause a denial of service, obtain sensitive information, spoof the UI, bypass security restrictions, or execute arbitrary code. It was discovered that extensions could open popup windows with control of the window title in some circumstances. If a user were tricked into installing a specially crafted extension, an attacker could potentially exploit this to spoof a website and trick the user into providing credentials. Multiple security issues were discovered in Thunderbird's OpenPGP integration. If a user were tricked into importing a specially crafted key in some circumstances, an attacker could potentially exploit this to cause a denial of service or confuse the user. A use-after-free was discovered when Responsive Design Mode was enabled. If a user were tricked into opening a specially crafted website with Responsive Design Mode enabled, an attacker could potentially exploit this to cause a denial of service, or execute arbitrary code. It was discovered that Thunderbird mishandled ftp URLs with encoded newline characters. If a user were tricked into clicking on a specially crafted link, an attacker could potentially exploit this to send arbitrary FTP commands. It was discovered that Thunderbird wrote signatures to disk and read them back during verification. A local attacker could potentially exploit this to replace the data with another signature file. It was discovered that Thunderbird might load an alternative OTR library. If a user were tricked into copying a specially crafted library to one of Thunderbird's search paths, an attacker could potentially exploit this to execute arbitrary code. It was discovered that secret keys imported into Thunderbird were stored unencrypted. A local attacker could potentially exploit this to obtain private keys. It was discovered that Thunderbird did not indicate when an inline signed or encrypted message contained additional unprotected parts. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, local, spoof, vulnerability
systems | linux, windows, ubuntu
advisories | CVE-2021-23961, CVE-2021-23982, CVE-2021-23984, CVE-2021-23987, CVE-2021-23994, CVE-2021-23995, CVE-2021-23999, CVE-2021-24002, CVE-2021-29948, CVE-2021-29949, CVE-2021-29956, CVE-2021-29957
SHA-256 | 81edf153f7a8ff7803ae890c659ea5d9e899b6b778102480a52389ef99c260ee
Ubuntu Security Notice USN-4995-1
Posted Jun 22, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4995-1 - Multiple security issues were discovered in Thunderbird. If a user were tricked into opening a specially crafted website in a browsing context, an attacker could potentially exploit these to cause a denial of service, obtain sensitive information, spoof the UI, bypass security restrictions, or execute arbitrary code. It was discovered that extensions could open popup windows with control of the window title in some circumstances. If a user were tricked into installing a specially crafted extension, an attacker could potentially exploit this to spoof a website and trick the user into providing credentials. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, spoof
systems | linux, windows, ubuntu
advisories | CVE-2021-23961, CVE-2021-23982, CVE-2021-23984, CVE-2021-23987, CVE-2021-23994, CVE-2021-23995, CVE-2021-23999, CVE-2021-24002, CVE-2021-29945, CVE-2021-29948, CVE-2021-29949, CVE-2021-29956, CVE-2021-29957
SHA-256 | 4377b3a315af5e52fb39b7a6d25d2f9f0a167af3746b0bb2a7e6f3615807b933
Debian Security Advisory 4897-1
Posted Apr 28, 2021
Authored by Debian | Site debian.org

Debian Linux Security Advisory 4897-1 - Multiple security issues were discovered in Thunderbird, which could result in the execution of arbitrary code or information disclosure. In adddition a number of security issues were addressed in the OpenPGP support.

tags | advisory, arbitrary, info disclosure
systems | linux, debian
advisories | CVE-2021-23961, CVE-2021-23991, CVE-2021-23992, CVE-2021-23993, CVE-2021-23994, CVE-2021-23995, CVE-2021-23998, CVE-2021-23999, CVE-2021-24002, CVE-2021-29945, CVE-2021-29946, CVE-2021-29948, CVE-2021-29949
SHA-256 | d046261a5bea547646c1ad71555d4faa8f38e2e133e219e9721c0bfe1ba81218
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