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CVE-2018-18509

N/A
Published: April 26, 2019 at 04:13 PM UTC
Updated: June 17, 2026 at 01:47 AM UTC
1 product affected across 1 vendorThunderbird

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Severity
N/A
Exploit prediction
EPSS 2%

Description

A flaw during verification of certain S/MIME signatures causes emails to be shown in Thunderbird as having a valid digital signature, even if the shown message contents aren't covered by the signature. The flaw allows an attacker to reuse a valid S/MIME signature to craft an email message with arbitrary content. This vulnerability affects Thunderbird < 60.5.1.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Thunderbird· Mozilla
95%
v < 60.5.1
Affected range stops below 60.5.1, so it looks safe — our inference, not a vendor statement

References (9)

Vendor Advisoryx_refsource_SUSE
Source: [email protected]
http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00043.html
x_refsource_MISCThird Party AdvisoryVDB Entry
Source: [email protected]
http://packetstormsecurity.com/files/152703/Johnny-You-Are-Fired.html
Mailing Listx_refsource_FULLDISCThird Party Advisory
Source: [email protected]
http://seclists.org/fulldisclosure/2019/Apr/38
Mailing Listx_refsource_MLISTThird Party Advisory
Source: [email protected]
http://www.openwall.com/lists/oss-security/2019/04/30/4
Vendor Advisoryx_refsource_REDHAT
Source: [email protected]
https://access.redhat.com/errata/RHSA-2019:1144
x_refsource_MISCIssue TrackingPermissions RequiredVendor Advisory
Source: [email protected]
https://bugzilla.mozilla.org/show_bug.cgi?id=1507218
x_refsource_MISC
Source: [email protected]
https://github.com/RUB-NDS/Johnny-You-Are-Fired
x_refsource_MISC
Source: [email protected]
https://github.com/RUB-NDS/Johnny-You-Are-Fired/blob/master/paper/johnny-fired.pdf

CVSS

5MEDIUM[email protected]
Confidentiality
NONE
Integrity
PARTIAL
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-347

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