Description
When verifying a mac with a ChunkedMacVerification object, Tink compares the resulting tag with non constant time comparison. This potentially allows an attacker to use timinig information as a side channel in order to get information how many bytes of a given tag match the correct tag. This in turn could allow to find a correct tag bytewise.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Tink-Java | All releases before 1.21.0, including 1.21.0. | — | |
| Tink-Android | All releases before 1.21.0, including 1.21.0. | — |
Advisories 1
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