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Security Advisories: GSA_kwCzR0hTQS1majJ3LXdmZ3YtbXdxNs0kcw
Denial of service in CBOR library
Impact
Due to this library's use of an inefficient algorithm, it is vulnerable to a denial of service attack when a maliciously crafted input is passed to DecodeFromBytes
or other CBOR decoding mechanisms in this library.
Affected versions include versions 4.0.0 through 4.5.0.
This vulnerability was privately reported to me.
Patches
This issue has been fixed in version 4.5.1. Users should use the latest version of this library. (The latest version is not necessarily 4.5.1. Check the README for this library's repository to see the latest version's version number.)
Workarounds
Again, users should use the latest version of this library.
In the meantime, note that the inputs affected by this issue are all CBOR maps or contain CBOR maps. An input that decodes to a single CBOR object is not capable of containing a CBOR map if—
- it begins with a byte other than 0x80 through 0xDF, or
- it does not contain a byte in the range 0xa0 through 0xBF.
Such an input is not affected by this vulnerability and an application can choose to perform this check before passing it to a CBOR decoding mechanism.
For more information
If you have any questions or comments about this advisory:
- Open an issue in the CBOR repository.
JSON: https://advisories.ecosyste.ms/api/v1/advisories/GSA_kwCzR0hTQS1majJ3LXdmZ3YtbXdxNs0kcw
Source: GitHub Advisory Database
Origin: Unspecified
Severity: High
Classification: General
Published: over 2 years ago
Updated: over 1 year ago
Identifiers: GHSA-fj2w-wfgv-mwq6
References:
- https://github.com/peteroupc/CBOR-Java/security/advisories/GHSA-fj2w-wfgv-mwq6
- https://github.com/advisories/GHSA-fj2w-wfgv-mwq6
Blast Radius: 0.0
Affected Packages
maven:com.upokecenter:cbor
Dependent packages: 34Dependent repositories: 72
Downloads:
Affected Version Ranges: >= 4.0.0, < 4.5.1
Fixed in: 4.5.1
All affected versions: 4.0.0, 4.0.1, 4.1.0, 4.1.1, 4.1.3, 4.2.0, 4.3.0, 4.4.0, 4.4.1, 4.4.2, 4.4.3, 4.4.4
All unaffected versions: 0.23.0, 1.0.0, 1.1.0, 1.2.0, 1.3.0, 2.0.0, 2.1.0, 2.2.0, 2.3.0, 2.3.1, 2.4.0, 2.4.1, 3.0.0, 3.0.1, 3.0.2, 3.0.3, 3.1.0, 3.2.0, 3.3.0, 3.4.0, 3.5.0, 3.5.1, 3.5.2, 3.6.0, 4.5.1, 4.5.2, 4.5.3