CVE-2018-10903
CVSS V2 Medium 5
CVSS V3 High 7.5
Description
A flaw was found in python-cryptography versions between >=1.9.0 and <2.3. The finalize_with_tag API did not enforce a minimum tag length. If a user did not validate the input length prior to passing it to finalize_with_tag an attacker could craft an invalid payload with a shortened tag (e.g. 1 byte) such that they would have a 1 in 256 chance of passing the MAC check. GCM tag forgeries can cause key leakage.
Overview
- CVE ID
- CVE-2018-10903
- Assigner
- secalert@redhat.com
- Vulnerability Status
- Modified
- Published Version
- 2018-07-30T16:29:00
- Last Modified Date
- 2021-08-04T17:14:46
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| cpe:2.3:a:cryptography:python-cryptography:*:*:*:*:*:*:*:* | 1 | OR | 1.9.0 | 2.3 |
| cpe:2.3:a:redhat:openstack:13:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* | 1 | OR |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:N/AC:L/Au:N/C:P/I:N/A:N
- Access Vector
- NETWORK
- Access Compatibility
- LOW
- Authentication
- NONE
- Confidentiality Impact
- PARTIAL
- Integrity Impact
- NONE
- Availability Impact
- NONE
- Base Score
- 5
- Severity
- MEDIUM
- Exploitability Score
- 10
- Impact Score
- 2.9
CVSS Version 3
- Version
- 3.0
- Vector String
- CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- Attack Vector
- NETWORK
- Attack Compatibility
- LOW
- Privileges Required
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality Impact
- HIGH
- Availability Impact
- NONE
- Base Score
- 7.5
- Base Severity
- HIGH
- Exploitability Score
- 3.9
- Impact Score
- 3.6
References
| Reference URL | Reference Tags |
|---|---|
| https://github.com/pyca/cryptography/pull/4342/commits/688e0f673bfbf43fa898994326c6877f00ab19ef | Patch Third Party Advisory |
| https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10903 | Issue Tracking Patch Third Party Advisory |
| https://usn.ubuntu.com/3720-1/ | Third Party Advisory |
| https://access.redhat.com/errata/RHSA-2018:3600 |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2018-10903 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-10903 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 06:58:34 | Added to TrackCVE | |||
| 2022-12-03 10:38:51 | 2018-07-30T16:29Z | 2018-07-30T16:29:00 | CVE Published Date | updated |
| 2022-12-03 10:38:51 | 2021-08-04T17:14:46 | CVE Modified Date | updated | |
| 2022-12-03 10:38:51 | Modified | Vulnerability Status | updated |