CVE-2018-6922
CVSS V2 Medium 5
CVSS V3 Medium 5.3
Description
One of the data structures that holds TCP segments in all versions of FreeBSD prior to 11.2-RELEASE-p1, 11.1-RELEASE-p12, and 10.4-RELEASE-p10 uses an inefficient algorithm to reassemble the data. This causes the CPU time spent on segment processing to grow linearly with the number of segments in the reassembly queue. An attacker who has the ability to send TCP traffic to a victim system can degrade the victim system's network performance and/or consume excessive CPU by exploiting the inefficiency of TCP reassembly handling, with relatively small bandwidth cost.
Overview
- CVE ID
- CVE-2018-6922
- Assigner
- secteam@freebsd.org
- Vulnerability Status
- Modified
- Published Version
- 2018-08-09T18:29:00
- Last Modified Date
- 2019-10-09T23:42:06
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| cpe:2.3:o:freebsd:freebsd:10.4:-:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:o:freebsd:freebsd:10.4:p1:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:o:freebsd:freebsd:10.4:p3:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:o:freebsd:freebsd:10.4:p4:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:o:freebsd:freebsd:10.4:p5:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:o:freebsd:freebsd:10.4:p6:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:o:freebsd:freebsd:10.4:p7:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:o:freebsd:freebsd:10.4:p8:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:o:freebsd:freebsd:10.4:p9:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:o:freebsd:freebsd:11.1:-:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:o:freebsd:freebsd:11.1:p1:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:o:freebsd:freebsd:11.1:p11:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:o:freebsd:freebsd:11.1:p2:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:o:freebsd:freebsd:11.1:p4:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:o:freebsd:freebsd:11.1:p5:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:o:freebsd:freebsd:11.1:p6:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:o:freebsd:freebsd:11.1:p7:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:o:freebsd:freebsd:11.1:p9:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:o:freebsd:freebsd:11.2:-:*:*:*:*:*:* | 1 | OR |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:N/AC:L/Au:N/C:N/I:N/A:P
- Access Vector
- NETWORK
- Access Compatibility
- LOW
- Authentication
- NONE
- Confidentiality Impact
- NONE
- Integrity Impact
- NONE
- Availability Impact
- PARTIAL
- 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:N/I:N/A:L
- Attack Vector
- NETWORK
- Attack Compatibility
- LOW
- Privileges Required
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality Impact
- NONE
- Availability Impact
- LOW
- Base Score
- 5.3
- Base Severity
- MEDIUM
- Exploitability Score
- 3.9
- Impact Score
- 1.4
References
| Reference URL | Reference Tags |
|---|---|
| https://www.freebsd.org/security/advisories/FreeBSD-SA-18:08.tcp.asc | Patch Vendor Advisory |
| http://www.securitytracker.com/id/1041425 | Third Party Advisory VDB Entry |
| http://www.securityfocus.com/bid/105058 | Third Party Advisory VDB Entry |
| https://security.netapp.com/advisory/ntap-20180815-0002/ | Third Party Advisory |
| https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html | Patch |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2018-6922 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-6922 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 17:03:46 | Added to TrackCVE | |||
| 2022-12-03 11:02:09 | 2018-08-09T18:29Z | 2018-08-09T18:29:00 | CVE Published Date | updated |
| 2022-12-03 11:02:09 | 2019-10-09T23:42:06 | CVE Modified Date | updated | |
| 2022-12-03 11:02:09 | Modified | Vulnerability Status | updated |