- Reported
-
- Issued
-
- Package
-
yaml-rust
(crates.io)
- Type
-
Vulnerability
- Keywords
-
#crash
- Aliases
-
- References
-
- CVSS Score
- 7.5
HIGH
- CVSS Details
-
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
- CVSS Vector
- CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Patched
-
Description
Affected versions of this crate did not prevent deep recursion while
deserializing data structures.
This allows an attacker to make a YAML file with deeply nested structures
that causes an abort while deserializing it.
The flaw was corrected by checking the recursion depth.
Note: clap 2.33 is not affected by this because it uses yaml-rust
in a way that doesn't trigger the vulnerability. More specifically:
-
The input to the YAML parser is always trusted - is included at compile
time via include_str!.
-
The nesting level is never deep enough to trigger the overflow in practice
(at most 5).
Advisory available under CC0-1.0
license.