Arch Linux Security Advisory ASA-202012-23 ========================================== Severity: High Date : 2020-12-16 CVE-ID : CVE-2020-16042 CVE-2020-26970 CVE-2020-26971 CVE-2020-26973 CVE-2020-26974 CVE-2020-26978 CVE-2020-35111 CVE-2020-35113 Package : thunderbird Type : multiple issues Remote : Yes Link : https://security.archlinux.org/AVG-1315 Summary ======= The package thunderbird before version 78.6.0-1 is vulnerable to multiple issues including arbitrary code execution, content spoofing and information disclosure. Resolution ========== Upgrade to 78.6.0-1. # pacman -Syu "thunderbird>=78.6.0-1" The problems have been fixed upstream in version 78.6.0. Workaround ========== None. Description =========== - CVE-2020-16042 (information disclosure) An uninitialized use security issue has been found in the V8 component of the chromium browser before version 87.0.4280.88 and Firefox before 84.0. - CVE-2020-26970 (arbitrary code execution) When reading SMTP server status codes, Thunderbird before 78.5.1 writes an integer value to a position on the stack that is intended to contain just one byte. Depending on processor architecture and stack layout, this leads to stack corruption that may be exploitable. - CVE-2020-26971 (arbitrary code execution) A security issue was found in Firefox before 84.0 and Thunderbird before 78.6 where certain blit values provided by the user were not properly constrained, leading to a heap buffer overflow on some video drivers. - CVE-2020-26973 (content spoofing) A security issue was found in Firefox before 84.0 and Thunderbird before 78.6 where certain input to the CSS Sanitizer confused it, resulting in incorrect components being removed. This could have been used as a sanitizer bypass. - CVE-2020-26974 (arbitrary code execution) A security issue was found in Firefox before 84.0 and Thunderbird before 78.6. When flex-basis was used on a table wrapper, a StyleGenericFlexBasis object could have been incorrectly cast to the wrong type. This resulted in a heap user-after-free, memory corruption, and a potentially exploitable crash. - CVE-2020-26978 (information disclosure) A security issue was discovered in Firefox before 84.0 and Thunderbird before 78.6. Using techniques that built on the slipstream research, a malicious webpage could have exposed both an internal network's hosts as well as services running on the user's local machine. - CVE-2020-35111 (information disclosure) A security issue was discovered in Firefox before 84.0 and Thunderbird before 78.6. When an extension with the proxy permission registered to receive <all_urls>, the proxy.onRequest callback was not triggered for view-source URLs. While web content cannot navigate to such URLs, a user opening View Source could have inadvertently leaked their IP address. - CVE-2020-35113 (arbitrary code execution) Mozilla developer Christian Holler reported memory safety bugs present in Firefox 83, Firefox ESR 78.5 and Thunderbird 78.5. Some of these bugs showed evidence of memory corruption and Mozilla presumes that with enough effort some of these could have been exploited to run arbitrary code. Impact ====== A remote attacker might be able to access sensitive information, spoof content or execute arbitrary code. Note that in general these flaws cannot be exploited through email in the Thunderbird product because scripting is disabled when reading mail, but are potentially risks in browser or browser-like contexts. References ========== https://bugs.archlinux.org/task/68853 https://www.mozilla.org/en-US/security/advisories/mfsa2020-53/ https://www.mozilla.org/en-US/security/advisories/mfsa2020-56/ https://chromereleases.googleblog.com/2020/12/stable-channel-update-for-desk... https://crbug.com/1151890 https://www.mozilla.org/en-US/security/advisories/mfsa2020-54/#CVE-2020-1604... https://bugzilla.mozilla.org/show_bug.cgi?id=1679003 https://www.mozilla.org/en-US/security/advisories/mfsa2020-53/#CVE-2020-2697... https://bugzilla.mozilla.org/show_bug.cgi?id=1677338 https://www.mozilla.org/en-US/security/advisories/mfsa2020-54/#CVE-2020-2697... https://www.mozilla.org/en-US/security/advisories/mfsa2020-56/#CVE-2020-2697... https://bugzilla.mozilla.org/show_bug.cgi?id=1663466 https://www.mozilla.org/en-US/security/advisories/mfsa2020-54/#CVE-2020-2697... https://www.mozilla.org/en-US/security/advisories/mfsa2020-56/#CVE-2020-2697... https://bugzilla.mozilla.org/show_bug.cgi?id=1680084 https://www.mozilla.org/en-US/security/advisories/mfsa2020-54/#CVE-2020-2697... https://www.mozilla.org/en-US/security/advisories/mfsa2020-56/#CVE-2020-2697... https://bugzilla.mozilla.org/show_bug.cgi?id=1681022 https://www.mozilla.org/en-US/security/advisories/mfsa2020-54/#CVE-2020-2697... https://www.mozilla.org/en-US/security/advisories/mfsa2020-56/#CVE-2020-2697... https://bugzilla.mozilla.org/show_bug.cgi?id=1677047 https://www.mozilla.org/en-US/security/advisories/mfsa2020-54/#CVE-2020-3511... https://www.mozilla.org/en-US/security/advisories/mfsa2020-56/#CVE-2020-3511... https://bugzilla.mozilla.org/show_bug.cgi?id=1657916 https://www.mozilla.org/en-US/security/advisories/mfsa2020-54/#CVE-2020-3511... https://www.mozilla.org/en-US/security/advisories/mfsa2020-56/#CVE-2020-3511... https://bugzilla.mozilla.org/buglist.cgi?bug_id=1664831%2C1673589 https://security.archlinux.org/CVE-2020-16042 https://security.archlinux.org/CVE-2020-26970 https://security.archlinux.org/CVE-2020-26971 https://security.archlinux.org/CVE-2020-26973 https://security.archlinux.org/CVE-2020-26974 https://security.archlinux.org/CVE-2020-26978 https://security.archlinux.org/CVE-2020-35111 https://security.archlinux.org/CVE-2020-35113