HistoryEdit

RUSTSEC-2021-0046

misc::vec_with_size() can drop uninitialized memory if clone panics

Issued
Package
telemetry (crates.io)
Type
Vulnerability
Categories
Keywords
#memory-safety
Aliases
Details
https://github.com/Yoric/telemetry.rs/issues/45
CVSS Score
9.8 CRITICAL
CVSS Details
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Patched
no patched versions
Keywords
#memory-safety

Description

misc::vec_with_size creates a vector of the provided size and immediately calls vec.set_len(size) on it, initially filling it with uninitialized memory. It then inserts elements using vec[i] = value.clone().

If the value.clone() call panics, uninitialized items in the vector will be dropped leading to undefined behavior.