How to force libxml1 to ignore cert in file and use a cert I pass it on the command line?












1














I am trying to verify a signed XML SAML Response. It contains a spoofed cert in the XML.



I have the known real cert in a PEM file.



When I run



xmlsec1 --verify --pubkey-cert-pem  pubkey-real.pem 
--id-attr:ID urn:oasis:names:tc:SAML:2.0:assertion:Assertion
--node-id DaavCk888T6_KR-Rtdm52CZSceG saml-req-spoofed.xml


it correctly validates it! It uses the certificate inside of the spoofed SAML request, instead of the known good one I am passing it on the command line. I know this because when I add --print-debug to the params it outputs the spoofed cert info.



Is there a way to force xmlsec1 to ignore the certificate inside of the XML file and force it to use the one I pass on the command line?



I am running xmlsec1 1.2.20 on a Mac.










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  • Same issue on Mac running with xmlsec1 1.2.26
    – Paul
    Nov 21 '18 at 20:48
















1














I am trying to verify a signed XML SAML Response. It contains a spoofed cert in the XML.



I have the known real cert in a PEM file.



When I run



xmlsec1 --verify --pubkey-cert-pem  pubkey-real.pem 
--id-attr:ID urn:oasis:names:tc:SAML:2.0:assertion:Assertion
--node-id DaavCk888T6_KR-Rtdm52CZSceG saml-req-spoofed.xml


it correctly validates it! It uses the certificate inside of the spoofed SAML request, instead of the known good one I am passing it on the command line. I know this because when I add --print-debug to the params it outputs the spoofed cert info.



Is there a way to force xmlsec1 to ignore the certificate inside of the XML file and force it to use the one I pass on the command line?



I am running xmlsec1 1.2.20 on a Mac.










share|improve this question
























  • Same issue on Mac running with xmlsec1 1.2.26
    – Paul
    Nov 21 '18 at 20:48














1












1








1







I am trying to verify a signed XML SAML Response. It contains a spoofed cert in the XML.



I have the known real cert in a PEM file.



When I run



xmlsec1 --verify --pubkey-cert-pem  pubkey-real.pem 
--id-attr:ID urn:oasis:names:tc:SAML:2.0:assertion:Assertion
--node-id DaavCk888T6_KR-Rtdm52CZSceG saml-req-spoofed.xml


it correctly validates it! It uses the certificate inside of the spoofed SAML request, instead of the known good one I am passing it on the command line. I know this because when I add --print-debug to the params it outputs the spoofed cert info.



Is there a way to force xmlsec1 to ignore the certificate inside of the XML file and force it to use the one I pass on the command line?



I am running xmlsec1 1.2.20 on a Mac.










share|improve this question















I am trying to verify a signed XML SAML Response. It contains a spoofed cert in the XML.



I have the known real cert in a PEM file.



When I run



xmlsec1 --verify --pubkey-cert-pem  pubkey-real.pem 
--id-attr:ID urn:oasis:names:tc:SAML:2.0:assertion:Assertion
--node-id DaavCk888T6_KR-Rtdm52CZSceG saml-req-spoofed.xml


it correctly validates it! It uses the certificate inside of the spoofed SAML request, instead of the known good one I am passing it on the command line. I know this because when I add --print-debug to the params it outputs the spoofed cert info.



Is there a way to force xmlsec1 to ignore the certificate inside of the XML file and force it to use the one I pass on the command line?



I am running xmlsec1 1.2.20 on a Mac.







saml-2.0 xmlsec xmlsec1






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share|improve this question













share|improve this question




share|improve this question








edited Nov 21 '18 at 16:48

























asked Nov 21 '18 at 16:36









Krystian Cybulski

5,43765186




5,43765186












  • Same issue on Mac running with xmlsec1 1.2.26
    – Paul
    Nov 21 '18 at 20:48


















  • Same issue on Mac running with xmlsec1 1.2.26
    – Paul
    Nov 21 '18 at 20:48
















Same issue on Mac running with xmlsec1 1.2.26
– Paul
Nov 21 '18 at 20:48




Same issue on Mac running with xmlsec1 1.2.26
– Paul
Nov 21 '18 at 20:48












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