PT-2021-6082 · Google+7 · Go+7
Emmanuel Odeke
·
Published
2021-02-19
·
Updated
2025-02-08
·
CVE-2021-33198
CVSS v3.1
7.5
High
| Vector | AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Name of the Vulnerable Software and Affected Versions
Go versions prior to 1.15.13
Go versions 1.16.x prior to 1.16.5
Description
The issue is related to the math/big.Rat component and the UnmarshalText method in the Go programming language, which can lead to uncontrolled memory allocation. This can cause a device to crash and restart when exploited by a remote attacker. The problem arises when the Rat.SetString or Rat.UnmarshalText method is passed inputs with very large exponents, potentially resulting in a panic or an unrecoverable fatal error.
Recommendations
For Go versions prior to 1.15.13, update to version 1.15.13 or later to resolve the issue.
For Go versions 1.16.x prior to 1.16.5, update to version 1.16.5 or later to resolve the issue.
As a temporary workaround, consider restricting the use of the
Rat.SetString and Rat.UnmarshalText methods until a patch is available, especially when handling inputs with large exponents.Exploit
Fix
Found an issue in the description? Have something to add? Feel free to write us 👾
Weakness Enumeration
Related Identifiers
Affected Products
Alt Linux
Almalinux
Astra Linux
Centos
Go
Red Hat
Rocky Linux
Suse