Open actionable advisories and recorded vendor fixes. This public package view has no inventory attached and cannot establish whether your deployment is affected. A vendor fix never resolves your finding; verify your installed version and the source guidance.
Open advisories
3 actionable advisories, newest first. Withdrawn advisories and news are excluded. Coverage is partial.
Symfony\Component\Mime\Header\ParameterizedHeader (and the related parameter handling reachable from Symfony\Component\Mime\Header\Headers) is responsible for serializing structured headers such as Content-Type and Content-Disposition, which carry key=value parameters (e.g. Content-Disposition: attachment; filename="x"). RFC 2045 / RFC 5322 require parameter names to be tokens: a restricted ASCII subset that excludes whitespace, CR/LF, and the tspecials set. Symfony's parameter handling validates and properly encodes parameter values, but does not validate parameter names: the supplied name is emitted verbatim into the serialized header. A caller that derives a parameter name from untrusted input, e.g. an application that lets a user influence a Content-Disposition parameter name, can include \r\n or other non-token bytes inside the name, terminating the current header and injecting additional headers in the rendered message. This is the classic CRLF / header-injection…
Recommended action: Upgrade to 8.0.12, 7.4.12, 6.4.40 or 5.4.52 by release line, then redeploy and verify.A vendor fix does not resolve your finding until you verify it in your own systems.
Symfony\Component\Mime\Address is the value-object every Symfony Mailer address (to/cc/bcc/from/reply-to) flows through; its constructor is documented as validating the address and throwing on invalid input, so developers treat it as a security boundary. The constructor accepts email addresses whose local-part (the part before @) is an RFC-5322 quoted string containing raw \r\n bytes, e.g. "x\r\nBcc: attacker@evil"@example.com. The stored address is later emitted verbatim into (1) the rendered message headers and (2) SmtpTransport's MAIL FROM:<... / RCPT TO:<... protocol lines, turning the embedded CRLF into a new mail header and/or a new SMTP command. Resolution The Address constructor now rejects addresses containing line breaks. The patch for this issue is available here for branch 5.4. Credits We would like to thank Claude Mythos Preview (via Project Glasswing) for reporting the issue and providing the fix.
Recommended action: Upgrade to 8.0.12, 7.4.12, 6.4.40 or 5.4.52 by release line, then redeploy and verify.A vendor fix does not resolve your finding until you verify it in your own systems.
An issue was discovered in Symfony 2.8.0 through 2.8.50, 3.4.0 through 3.4.34, 4.2.0 through 4.2.11, and 4.3.0 through 4.3.7. If an application passes unvalidated user input as the file for which MIME type validation should occur, then arbitrary arguments are passed to the underlying file command. This is related to symfony/http-foundation (and symfony/mime in 4.3.x).
Recommended action: Upgrade to 4.3.8 or later, then redeploy and verify.A vendor fix does not resolve your finding until you verify it in your own systems.