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help / color / mirror / Atom feedFrom: Jacob Champion <[email protected]>
To: [email protected]
Subject: pgsql: Protect against small overread in SASLprep validation
Date: Fri, 06 Feb 2026 20:20:11 +0000
Message-ID: <[email protected]> (raw)
Protect against small overread in SASLprep validation
(This is a cherry-pick of 390b3cbbb, which I hadn't realized wasn't
backpatched. It was originally reported to security@ and determined not
to be a vulnerability; thanks to Stanislav Osipov for noticing the
omission in the back branches.)
In case of torn UTF8 in the input data we might end up going
past the end of the string since we don't account for length.
While validation won't be performed on a sequence with a NULL
byte it's better to avoid going past the end to beging with.
Fix by taking the length into consideration.
Reported-by: Stanislav Osipov <[email protected]>
Reviewed-by: Daniel Gustafsson <[email protected]>
Discussion: https://postgr.es/m/CAOYmi+mTnmM172g=_+Yvc47hzzeAsYPy2C4UBY3HK9p-AXNV0g@mail.gmail.com
Backpatch-through: 14
Branch
------
REL_17_STABLE
Details
-------
https://git.postgresql.org/pg/commitdiff/5d61bdd11448bd8e61ed12df07ae8b5064772a48
Modified Files
--------------
src/common/saslprep.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
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