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An attacker can craft an input to the Parse functions that would be processed non-linearly with respect to its length, resulting in extremely slow parsing. This could cause a denial of service.
github.com/aws/aws-sdk-go1.55.5 (golang)
pkg:golang/github.com/aws/aws-sdk-go@1.55.5
Affected range
>=0
Fixed version
Not Fixed
Description
A padding oracle vulnerability exists in the AWS S3 Crypto SDK for GoLang versions prior to V2. The SDK allows users to encrypt files with AES-CBC without computing a Message Authentication Code (MAC), which then allows an attacker who has write access to the target's S3 bucket and can observe whether or not an endpoint with access to the key can decrypt a file, they can reconstruct the plaintext with (on average) 128*length (plaintext) queries to the endpoint, by exploiting CBC's ability to manipulate the bytes of the next block and PKCS5 padding errors. It is recommended to update your SDK to V2 or later, and re-encrypt your files.
Affected range
>=0
Fixed version
Not Fixed
Description
A vulnerability in the in-band key negotiation exists in the AWS S3 Crypto SDK for GoLang versions prior to V2. An attacker with write access to the targeted bucket can change the encryption algorithm of an object in the bucket, which can then allow them to change AES-GCM to AES-CTR. Using this in combination with a decryption oracle can reveal the authentication key used by AES-GCM as decrypting the GMAC tag leaves the authentication key recoverable as an algebraic equation. It is recommended to update your SDK to V2 or later, and re-encrypt your files.
gopkg.in/square/go-jose.v22.6.0 (golang)
pkg:golang/gopkg.in/square/go-jose.v2@2.6.0
Improper Handling of Highly Compressed Data (Data Amplification)
Affected range
<=2.6.0
Fixed version
Not Fixed
CVSS Score
4.3
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Description
Impact
An attacker could send a JWE containing compressed data that used large amounts of memory and CPU when decompressed by Decrypt or DecryptMulti. Those functions now return an error if the decompressed data would exceed 250kB or 10x the compressed size (whichever is larger). Thanks to Enze Wang@Alioth and Jianjun Chen@Zhongguancun Lab (@zer0yu and @chenjj) for reporting.
Patches
The problem is fixed in the following packages and versions:
github.com/go-jose/go-jose/v4 version 4.0.1
github.com/go-jose/go-jose/v3 version 3.0.3
gopkg.in/go-jose/go-jose.v2 version 2.6.3
The problem will not be fixed in the following package because the package is archived:
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This PR contains the following updates:
7.12.0->7.12.1Warning
Some dependencies could not be looked up. Check the Dependency Dashboard for more information.
Release Notes
concourse/concourse (concourse/concourse)
v7.12.1Compare Source
What's Changed
New Contributors
Full Changelog: concourse/concourse@v7.12.0...v7.12.1
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