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RUSTSEC-2021-0044
No affected components available
Affected versions of this crate transmuted a &str to a &'static str before
pushing it into a StackVec, this value was then popped later in the same
function.
This was assumed to be safe because the reference would be valid while the
method's stack was active. In between the push and the pop, however, a function
f was called that could invoke a user provided function.
If the user provided panicked, then the assumption used by the function was no
longer true and the transmute to &'static would create an illegal static
reference to the string. This could result in a freed string being used during
(such as in a Drop implementation) or after (e.g through catch_unwind) the
panic unwinding.
This flaw was corrected in commit e325e2f
by using a guard object to ensure that the &'static str was dropped inside
the function.
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. The impact is confined to the system where the vulnerability exists. There is a low impact on the confidentiality of the information. There is a low impact on the integrity of the data. There is a low impact on the availability of the system.
Exploitation attempts have been detected. Elevated vigilance and prompt remediation are advised.
The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
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