Linux Security
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    Linux Security

    ArchLinux: 202012-23: thunderbird: multiple issues

    Date 31 Dec 2020
    287
    Posted By LinuxSecurity Advisories
    The package thunderbird before version 78.6.0-1 is vulnerable to multiple issues including arbitrary code execution, content spoofing and information disclosure.
    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 , 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-desktop.html
    https://crbug.com/1151890
    https://www.mozilla.org/en-US/security/advisories/mfsa2020-54/#CVE-2020-16042
    https://bugzilla.mozilla.org/show_bug.cgi?id=1679003
    https://www.mozilla.org/en-US/security/advisories/mfsa2020-53/#CVE-2020-26970
    https://bugzilla.mozilla.org/show_bug.cgi?id=1677338
    https://www.mozilla.org/en-US/security/advisories/mfsa2020-54/#CVE-2020-26971
    https://www.mozilla.org/en-US/security/advisories/mfsa2020-56/#CVE-2020-26971
    https://bugzilla.mozilla.org/show_bug.cgi?id=1663466
    https://www.mozilla.org/en-US/security/advisories/mfsa2020-54/#CVE-2020-26973
    https://www.mozilla.org/en-US/security/advisories/mfsa2020-56/#CVE-2020-26973
    https://bugzilla.mozilla.org/show_bug.cgi?id=1680084
    https://www.mozilla.org/en-US/security/advisories/mfsa2020-54/#CVE-2020-26974
    https://www.mozilla.org/en-US/security/advisories/mfsa2020-56/#CVE-2020-26974
    https://bugzilla.mozilla.org/show_bug.cgi?id=1681022
    https://www.mozilla.org/en-US/security/advisories/mfsa2020-54/#CVE-2020-26978
    https://www.mozilla.org/en-US/security/advisories/mfsa2020-56/#CVE-2020-26978
    https://bugzilla.mozilla.org/show_bug.cgi?id=1677047
    https://www.mozilla.org/en-US/security/advisories/mfsa2020-54/#CVE-2020-35111
    https://www.mozilla.org/en-US/security/advisories/mfsa2020-56/#CVE-2020-35111
    https://bugzilla.mozilla.org/show_bug.cgi?id=1657916
    https://www.mozilla.org/en-US/security/advisories/mfsa2020-54/#CVE-2020-35113
    https://www.mozilla.org/en-US/security/advisories/mfsa2020-56/#CVE-2020-35113
    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
    

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