Vulnerability Name:

CVE-2018-16949 (CCN-149839)

Assigned:2018-09-11
Published:2018-09-11
Updated:2019-03-07
Summary:An issue was discovered in OpenAFS before 1.6.23 and 1.8.x before 1.8.2. Several data types used as RPC input variables were implemented as unbounded array types, limited only by the inherent 32-bit length field to 4 GB. An unauthenticated attacker could send, or claim to send, large input values and consume server resources waiting for those inputs, denying service to other valid connections.
CVSS v3 Severity:7.5 High (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
6.5 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): High
7.5 High (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
6.5 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): High
CVSS v2 Severity:5.0 Medium (CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Partial
7.8 High (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:C)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Complete
Vulnerability Type:CWE-400
Vulnerability Consequences:Denial of Service
References:Source: MITRE
Type: CNA
CVE-2018-16949

Source: CCN
Type: OpenAFS Security Advisory-2018-003
Denial of service due to excess resource consumption

Source: CONFIRM
Type: Vendor Advisory
http://openafs.org/pages/security/OPENAFS-SA-2018-003.txt

Source: BID
Type: Third Party Advisory, VDB Entry
106375

Source: XF
Type: UNKNOWN
openafs-cve201816949-dos(149839)

Source: MLIST
Type: Mailing List, Third Party Advisory
[debian-lts-announce] 20180921 [SECURITY] [DLA 1513-1] openafs security update

Source: DEBIAN
Type: Third Party Advisory
DSA-4302

Vulnerable Configuration:Configuration 1:
  • cpe:/a:openafs:openafs:*:*:*:*:*:*:*:* (Version < 1.6.23)
  • OR cpe:/a:openafs:openafs:*:*:*:*:*:*:*:* (Version >= 1.8.0 and < 1.8.2)

    • Configuration 2:
  • cpe:/o:debian:debian_linux:8.0:*:*:*:*:*:*:*
  • OR cpe:/o:debian:debian_linux:9.0:*:*:*:*:*:*:*

    • Configuration CCN 1:
  • cpe:/a:openafs:openafs:1.6.22.4:*:*:*:*:*:*:*
  • OR cpe:/a:openafs:openafs:1.8.0:*:*:*:*:*:*:*
  • OR cpe:/a:openafs:openafs:1.8.1.1:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:org.opensuse.security:def:113056
    P
    		openafs-1.8.8-1.13 on GA media (Moderate)
    2022-01-17
    oval:org.opensuse.security:def:106496
    P
    		openafs-1.8.8-1.13 on GA media (Moderate)
    2021-10-01
    oval:com.ubuntu.disco:def:2018169490000000
    V
    		CVE-2018-16949 on Ubuntu 19.04 (disco) - medium.
    2018-09-12
    oval:com.ubuntu.bionic:def:2018169490000000
    V
    		CVE-2018-16949 on Ubuntu 18.04 LTS (bionic) - medium.
    2018-09-12
    oval:com.ubuntu.xenial:def:2018169490000000
    V
    		CVE-2018-16949 on Ubuntu 16.04 LTS (xenial) - medium.
    2018-09-12
    oval:com.ubuntu.bionic:def:201816949000
    V
    		CVE-2018-16949 on Ubuntu 18.04 LTS (bionic) - medium.
    2018-09-11
    oval:com.ubuntu.cosmic:def:2018169490000000
    V
    		CVE-2018-16949 on Ubuntu 18.10 (cosmic) - medium.
    2018-09-11
    oval:com.ubuntu.cosmic:def:201816949000
    V
    		CVE-2018-16949 on Ubuntu 18.10 (cosmic) - medium.
    2018-09-11
    oval:com.ubuntu.trusty:def:201816949000
    V
    		CVE-2018-16949 on Ubuntu 14.04 LTS (trusty) - medium.
    2018-09-11
    oval:com.ubuntu.xenial:def:201816949000
    V
    		CVE-2018-16949 on Ubuntu 16.04 LTS (xenial) - medium.
    2018-09-11
    BACK
    openafs openafs *
    openafs openafs *
    debian debian linux 8.0
    debian debian linux 9.0
    openafs openafs 1.6.22.4
    openafs openafs 1.8.0
    openafs openafs 1.8.1.1