[krbdev.mit.edu #9209] git commit
"Greg Hudson via RT" <[email protected]> Sat, 16 May 2026 18:37:04 -0400
| Newsgroups | gmane.comp.encryption.kerberos.bugs |
|---|---|
| Message-ID | <[email protected]> |
Sat May 16 18:37:04 2026: Request 9209 was acted upon. Transaction: Ticket created by [email protected] Queue: krb5 Subject: git commit Owner: [email protected] Requestors: Status: new Ticket <URL: https://krbdev.mit.edu/rt/Ticket/Display.html?id=9209 > Validate lengths when deserializing When unmarshalling data structures using the krb5_ser_ functions, bound-check lengths (including array counts) against the remaining number of bytes to prevent large allocations, integer overflows, and a potential read overrun in mspac_internalize(). Add an internal helper function k5_ser_unpack_len() for this purpose. [[email protected]: added helper; added bounds checks for additional lengths; rewrote commit message] https://github.com/krb5/krb5/commit/63ae6a8d99ce89258d732f7561233f60df533fa9 Author: TristanInSec <[email protected]> Committer: Greg Hudson <[email protected]> Commit: 63ae6a8d99ce89258d732f7561233f60df533fa9 Branch: master src/include/k5-int.h | 3 +++ src/lib/gssapi/krb5/ser_sctx.c | 6 ++++++ src/lib/krb5/krb/authdata.c | 5 ++--- src/lib/krb5/krb/pac.c | 13 ++++++------- src/lib/krb5/krb/ser_actx.c | 5 ++--- src/lib/krb5/krb/ser_adata.c | 13 ++++++------- src/lib/krb5/krb/ser_addr.c | 12 ++++++------ src/lib/krb5/krb/ser_auth.c | 15 +++++---------- src/lib/krb5/krb/ser_cksum.c | 14 ++++++-------- src/lib/krb5/krb/ser_ctx.c | 18 +++++++++--------- src/lib/krb5/krb/ser_key.c | 11 +++++------ src/lib/krb5/krb/ser_princ.c | 11 +++++------ src/lib/krb5/krb/serialize.c | 18 ++++++++++++++++++ src/lib/krb5/libkrb5.exports | 1 + src/plugins/authdata/greet_client/greet.c | 2 ++ 15 files changed, 82 insertions(+), 65 deletions(-)