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Ubuntu: USN-4736-1 (CVE-2020-15685): Thunderbird vulnerabilities

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Ubuntu: USN-4736-1 (CVE-2020-15685): Thunderbird vulnerabilities

Severity
4
CVSS
(AV:L/AC:M/Au:N/C:P/I:P/A:P)
Published
01/29/2021
Created
02/19/2021
Added
02/17/2021
Modified
02/17/2021

Description

Details for this vulnerability have not been published by NIST at this point. Descriptions from software vendor advisories for this issue are provided below.

From USN-4736-1:

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, or execute arbitrary code. (CVE-2020-26976, CVE-2021-23953,CVE-2021-23954,CVE-2021-23960,CVE-2021-23964)

It was discovered that responses received during the plaintext phase of the STARTTLS connection setup were subsequently evaluated during the encrypted session. A person in the middle could potentially exploit this to perform a response injection attack. (CVE-2020-15685)

Solution(s)

  • ubuntu-upgrade-thunderbird

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