Skip to content

kerberos: fix S4U when using FAST #5165

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
gpotter2 merged 1 commit into from
Sep 10, 2026
+4 −4
Merged

kerberos: fix S4U when using FAST #5165

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
8 changes: 4 additions & 4 deletions scapy/layers/kerberos.py
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -2153,7 +2153,7 @@ def m2i(self, pkt, s):
try:
return KERB_ERROR_DATA(val[0].val, _underlayer=pkt), val[1]
except BER_Decoding_Error:
if pkt.errorCode.val in [18, 12]:
if pkt.errorCode.val in [12, 18, 41]:
# Some types can also happen in FAST sessions
# 18: KDC_ERR_CLIENT_REVOKED
return MethodData(val[0].val, _underlayer=pkt), val[1]
Expand Down Expand Up @@ -4033,13 +4033,13 @@ def tgs_req(self):
# "if the key's encryption type is RC4_HMAC_NT (23) the checksum type
# is rsa-md4 (2) as defined in section 6.2.6 of [RFC3961]."
pasfux509.checksum.make(
self.key,
self.subkey or self.key,
bytes(pasfux509.userId),
cksumtype=ChecksumType.RSA_MD4,
)
else:
pasfux509.checksum.make(
self.key,
self.subkey or self.key,
bytes(pasfux509.userId),
)
padata.append(
Expand All @@ -4066,7 +4066,7 @@ def tgs_req(self):
).encode()
)
paforuser.cksum.make(
self.key,
self.subkey or self.key,
S4UByteArray,
cksumtype=ChecksumType.HMAC_MD5,
)
Expand Down
Loading