CVE-2021-25641
Published Jun 1, 2021
Last updated 3 years ago
Overview
- Description
- Each Apache Dubbo server will set a serialization id to tell the clients which serialization protocol it is working on. But for Dubbo versions before 2.7.8 or 2.6.9, an attacker can choose which serialization id the Provider will use by tampering with the byte preamble flags, aka, not following the server's instruction. This means that if a weak deserializer such as the Kryo and FST are somehow in code scope (e.g. if Kryo is somehow a part of a dependency), a remote unauthenticated attacker can tell the Provider to use the weak deserializer, and then proceed to exploit it.
- Source
- security@apache.org
- NVD status
- Analyzed
Risk scores
CVSS 3.1
- Type
- Primary
- Base score
- 9.8
- Impact score
- 5.9
- Exploitability score
- 3.9
- Vector string
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Severity
- CRITICAL
CVSS 2.0
- Type
- Primary
- Base score
- 7.5
- Impact score
- 6.4
- Exploitability score
- 10
- Vector string
- AV:N/AC:L/Au:N/C:P/I:P/A:P
Weaknesses
- nvd@nist.gov
- CWE-502
Social media
- Hype score
- Not currently trending
Configurations
[
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:a:apache:dubbo:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "35FDD1BF-2F98-47A3-810B-244ADABF883D",
"versionEndExcluding": "2.6.9",
"versionStartIncluding": "2.5.0"
},
{
"criteria": "cpe:2.3:a:apache:dubbo:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "A18E0E5C-4E03-4F13-A368-A63B8118AACF",
"versionEndExcluding": "2.7.8",
"versionStartIncluding": "2.7.0"
}
],
"operator": "OR"
}
]
}
]