What’s Vulnerable › Vulnerabilities

CVE-2017-7829

• Severity: medium (CVSS 5.3 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.8% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2018-06-11 · updated 2026-06-17
• Weakness: CWE-20

Description

It is possible to spoof the sender's email address and display an arbitrary sender address to the email recipient. The real sender's address is not displayed if preceded by a null character in the display string. This vulnerability affects Thunderbird < 52.5.2.

Affected products

• Canonical Ubuntu Linux: 14.04, 16.04, 17.10
• Debian Linux: 7.0, 8.0, 9.0
• Mozilla Thunderbird: before 52.5.2 — fixed in 52.5.2
• RedHat Enterprise Linux Aus: 7.4
• RedHat Enterprise Linux Desktop: 6.0, 7.0
• RedHat Enterprise Linux Eus: 7.4, 7.5
• RedHat Enterprise Linux Server: 6.0, 7.0
• RedHat Enterprise Linux Workstation: 6.0, 7.0

How to fix

Upgrade to a fixed version: Mozilla Thunderbird 52.5.2. Check the vendor advisory for mitigations.

References

• http://www.securityfocus.com/bid/102258
• http://www.securitytracker.com/id/1040123
• https://access.redhat.com/errata/RHSA-2018:0061
• https://bugzilla.mozilla.org/show_bug.cgi?id=1423432
• https://lists.debian.org/debian-lts-announce/2017/12/msg00026.html
• https://usn.ubuntu.com/3529-1/
• https://www.debian.org/security/2017/dsa-4075
• https://www.mozilla.org/security/advisories/mfsa2017-30/
• http://www.securityfocus.com/bid/102258
• http://www.securitytracker.com/id/1040123
• https://access.redhat.com/errata/RHSA-2018:0061
• https://bugzilla.mozilla.org/show_bug.cgi?id=1423432

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