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GHSA-xrrq-rrgq-h89w
No affected components available
The affected function, MemBump::new(), would allocate memory without initializing it. Subsequently calling the created value's various allocmethods would then read and write the start of that memory as a Cell which isundefined behavior. Instead, it should zero initialize the start of the allocated memory.
For instance, some values could violate the internal invariants of the type and cause an assertion failure. Nevertheless, no deterministic read is known tocause further uninitialized memory to be exposed.
Affected downstream users that can not upgrade are advised to call MemBump::reset immediately after allocation to manually perform the missing write of the counter best-as-possible.
The flaw was corrected in commit d8d6a7d096d3aaafd963b356a8f1bbd8d26fd967 by zeroing the Cell at the start of the allocated memory.
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.
No exploitation activity has been observed at this time. Continue routine monitoring.
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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