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    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.

    Published:Dec 22, 2017
    Last Modified:Apr 20, 2025
    EPS:Dec 22, 2017
    EPSS Score:0.00872
    CVSS Score:7.5

    Affected Products

    Vendor
    Debian
    Product
    Debian Linux
    Vendor
    Enigmail
    Product
    Enigmail

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-463 Padding Oracle Crypto Attack
    CAPEC-475 Signature Spoofing by Improper Validation

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    References

    http://packetstormsecurity.com/files/152703/Johnny-You-Are-Fired.html
    http://seclists.org/fulldisclosure/2019/Apr/38
    http://www.openwall.com/lists/oss-security/2019/04/30/4
    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.html
    https://lists.debian.org/debian-security-announce/2017/msg00333.html
    https://sourceforge.net/p/enigmail/bugs/709/
    https://www.debian.org/security/2017/dsa-4070
    http://packetstormsecurity.com/files/152703/Johnny-You-Are-Fired.html
    http://seclists.org/fulldisclosure/2019/Apr/38
    http://www.openwall.com/lists/oss-security/2019/04/30/4
    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.html
    https://lists.debian.org/debian-security-announce/2017/msg00333.html
    https://sourceforge.net/p/enigmail/bugs/709/
    https://www.debian.org/security/2017/dsa-4070

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High