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USN-3529-1: Thunderbird vulnerabilities

29 January 2018

Several security issues were fixed in Thunderbird.



  • thunderbird - Mozilla Open Source mail and newsgroup client


It was discovered that a From address encoded with a null character is
cut off in the message header display. An attacker could potentially
exploit this to spoof the sender address. (CVE-2017-7829)

It was discovered that it is possible to execute JavaScript in RSS feeds
in some circumstances. If a user were tricked in to opening a specially
crafted RSS feed, an attacker could potentially exploit this in
combination with another vulnerability, in order to cause unspecified
problems. (CVE-2017-7846)

It was discovered that the RSS feed can leak local path names. If a user
were tricked in to opening a specially crafted RSS feed, an attacker
could potentially exploit this to obtain sensitive information.

It was discovered that RSS feeds are vulnerable to new line injection. If
a user were tricked in to opening a specially crafted RSS feed, an
attacker could potentially exploit this to cause unspecified problems.

Multiple security issues were discovered in Thunderbird. If a user were
tricked in to opening a specially crafted website in a browsing context,
an attacker could potentially exploit these to cause a denial of service,
execute arbitrary code, or cause other unspecified effects.
(CVE-2018-5089, CVE-2018-5095, CVE-2018-5096, CVE-2018-5097,
CVE-2018-5098, CVE-2018-5099, CVE-2018-5102, CVE-2018-5103, CVE-2018-5104,

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 17.10
Ubuntu 16.04
Ubuntu 14.04

After a standard system update you need to restart Thunderbird to make
all the necessary changes.

Related notices

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