[16870] in Kerberos-V5-bugs
[krbdev.mit.edu #9085] git commit
daemon@ATHENA.MIT.EDU (Greg Hudson via RT)
Mon Feb 13 21:57:26 2023
From: "Greg Hudson via RT" <rt-comment@krbdev.mit.edu>
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Mon Feb 13 21:57:14 2023: Request 9085 was acted upon.
Transaction: Ticket created by ghudson@mit.edu
Queue: krb5
Subject: git commit
Owner: ghudson@mit.edu
Requestors:
Status: new
Ticket <URL: https://krbdev.mit.edu/rt/Ticket/Display.html?id=9085 >
Fix read overruns in SPNEGO parsing
Fix three read overruns discovered by the GitHub Security Lab team
(GHSL-2023-016, GHSL-2023-017, and GHSL-2023-018) using OSS-Fuzz.
In get_mech_set(), error out if gss_add_oid_set_member() fails rather
than continue the loop and increment i past the current bound of
returned_mechSet. In g_verify_neg_token_init(), check for zero-byte
sequences before reading tag bytes, and reduce cur_size by one to
account for the tag byte when calling gssint_get_der_length().
https://github.com/krb5/krb5/commit/47c2a12830dbd7fb8e13c239ddc0ac74129a91f6
Author: Greg Hudson <ghudson@mit.edu>
Commit: 47c2a12830dbd7fb8e13c239ddc0ac74129a91f6
Branch: master
src/lib/gssapi/spnego/spnego_mech.c | 16 ++++++++++------
1 file changed, 10 insertions(+), 6 deletions(-)
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