CVE-2017-17848

An issue was discovered in Enigmail before 1.9.9. In a variant of CVE-2017-17847, signature spoofing is possible for multipart/related messages because a signed message part can be referenced with a cid: URI but not actually displayed. In other words, the entire containing message appears to be signed, but the recipient does not see any of the signed text.

• CWE-347

• http://packetstormsecurity.com/files/152703/Johnny-You-Are-Fired.htmlThird Party Advisory, VDB Entry
• http://seclists.org/fulldisclosure/2019/Apr/38Mailing List, Third Party Advisory
• http://www.openwall.com/lists/oss-security/2019/04/30/4Mailing List, Third Party Advisory
• https://github.com/RUB-NDS/Johnny-You-Are-Fired
• https://github.com/RUB-NDS/Johnny-You-Are-Fired/blob/master/paper/johnny-fired.pdf
• https://lists.debian.org/debian-lts-announce/2017/12/msg00021.htmlMailing List, Third Party Advisory
• https://lists.debian.org/debian-security-announce/2017/msg00333.htmlMailing List, Third Party Advisory
• https://sourceforge.net/p/enigmail/bugs/709/Third Party Advisory
• https://www.debian.org/security/2017/dsa-4070Third Party Advisory
• http://packetstormsecurity.com/files/152703/Johnny-You-Are-Fired.htmlThird Party Advisory, VDB Entry
• http://seclists.org/fulldisclosure/2019/Apr/38Mailing List, Third Party Advisory
• http://www.openwall.com/lists/oss-security/2019/04/30/4Mailing List, Third Party Advisory
• https://github.com/RUB-NDS/Johnny-You-Are-Fired
• https://github.com/RUB-NDS/Johnny-You-Are-Fired/blob/master/paper/johnny-fired.pdf
• https://lists.debian.org/debian-lts-announce/2017/12/msg00021.htmlMailing List, Third Party Advisory
• https://lists.debian.org/debian-security-announce/2017/msg00333.htmlMailing List, Third Party Advisory
• https://sourceforge.net/p/enigmail/bugs/709/Third Party Advisory
• https://www.debian.org/security/2017/dsa-4070Third Party Advisory

Published

Dec 27, 2017

Last Modified

Jun 17, 2026

Status

Modified

• Same Subject, Wrong User: A Cross-Issuer Account Takeover in n8nStrix found an identity-binding bug in n8n's token-exchange flow enabling account takeover.
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