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RUSTSEC-2026-0207
No affected components available
The incremental squeeze functions in the portable SHAKE XOF API, when
attempting to squeeze an output using multiple calls to squeeze,
rather than squeezing the full output at once, could output incorrect
values. Internally, output blocks that were not completely squeezed
were not buffered for the next call to squeeze, which would
consequently drop bytes of the correct squeeze output if the preceding
call requested an output of length in bytes not cleanly divisible by
RATE (168 for SHAKE128, 136 for SHAKE256).
Impact
This bug impacts users that rely on this XOF API to squeeze output in
multiple calls where any of the calls request an output length that is
not divisible by RATE. It does not impact the use of libcrux-sha3 in
libcrux-ml-kem or libcrux-ml-dsa.
Mitigation
Starting from version 0.0.10 the squeeze functions correctly output
all squeezed bytes independent of the number of squeeze calls and
the output lengths requested in each call.
The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker does not need any special privileges or access rights. No user interaction is needed for the attacker to exploit this vulnerability.
Exploitation attempts have been detected. Elevated vigilance and prompt remediation are advised.
Probability that this vulnerability will be exploited in the wild within the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
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