CVE-2018-5733
A malicious client can overflow a reference counter in ISC dhcpd
Severity Score
7.5
*CVSS v3.1
Exploit Likelihood
*EPSS
Affected Versions
*CPE
Public Exploits
0
*Multiple Sources
Exploited in Wild
-
*KEV
Decision
-
*SSVC
Descriptions
A malicious client which is allowed to send very large amounts of traffic (billions of packets) to a DHCP server can eventually overflow a 32-bit reference counter, potentially causing dhcpd to crash. Affects ISC DHCP 4.1.0 -> 4.1-ESV-R15, 4.2.0 -> 4.2.8, 4.3.0 -> 4.3.6, 4.4.0.
Un cliente malicioso al que se le permite enviar grandes cantidades de tráfico (miles de millones de paquetes) a un servidor DHCP puede terminar desbordando un contador de referencia de 32 bits, provocando el cierre inesperado de dhcpd. Afecta a ISC DHCP desde la versión 4.1.0 hasta la 4.1-ESV-R15, desde la versión 4.2.0 hasta la 4.2.8, desde la versión 4.3.0 hasta la 4.3.6 y a la versión 4.4.0.
A denial of service flaw was found in the way dhcpd handled reference counting when processing client requests. A malicious DHCP client could use this flaw to trigger a reference count overflow on the server side, potentially causing dhcpd to crash, by sending large amounts of traffic.
USN-3586-1 fixed a vulnerability in DHCP. This update provides the corresponding update for Ubuntu 12.04 ESM. Felix Wilhelm discovered that the DHCP client incorrectly handled certain malformed responses. A remote attacker could use this issue to cause the DHCP client to crash, resulting in a denial of service, or possibly execute arbitrary code. In the default installation, attackers would be isolated by the dhclient AppArmor profile. Various other issues were also addressed.
*Credits:
ISC would like to thank Felix Wilhelm, Google Security Team, for reporting this vulnerability.
CVSS Scores
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Attack Vector
Attack Complexity
Authentication
Confidentiality
Integrity
Availability
* Common Vulnerability Scoring System
SSVC
- Decision:-
Exploitation
Automatable
Tech. Impact
* Organization's Worst-case Scenario
Timeline
- 2018-01-17 CVE Reserved
- 2018-03-01 CVE Published
- 2024-09-17 CVE Updated
- 2024-12-26 EPSS Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-190: Integer Overflow or Wraparound
CAPEC
References (11)
| URL | Tag | Source |
|---|---|---|
| http://www.securityfocus.com/bid/103188 | Third Party Advisory | |
| http://www.securitytracker.com/id/1040437 | Third Party Advisory | |
| https://lists.debian.org/debian-lts-announce/2018/03/msg00015.html | Mailing List |
|
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|---|---|
| https://access.redhat.com/errata/RHSA-2018:0469 | 2020-01-09 | |
| https://access.redhat.com/errata/RHSA-2018:0483 | 2020-01-09 | |
| https://kb.isc.org/docs/aa-01567 | 2020-01-09 | |
| https://usn.ubuntu.com/3586-1 | 2020-01-09 | |
| https://usn.ubuntu.com/3586-2 | 2020-01-09 | |
| https://www.debian.org/security/2018/dsa-4133 | 2020-01-09 | |
| https://access.redhat.com/security/cve/CVE-2018-5733 | 2018-03-12 | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1549961 | 2018-03-12 |
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | >= 4.2.0 <= 4.2.8 Search vendor "Isc" for product "Dhcp" and version " >= 4.2.0 <= 4.2.8" | - |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | >= 4.3.0 <= 4.3.6 Search vendor "Isc" for product "Dhcp" and version " >= 4.3.0 <= 4.3.6" | - |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.1-esv Search vendor "Isc" for product "Dhcp" and version "4.1-esv" | - |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.1-esv Search vendor "Isc" for product "Dhcp" and version "4.1-esv" | r1 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.1-esv Search vendor "Isc" for product "Dhcp" and version "4.1-esv" | r10 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.1-esv Search vendor "Isc" for product "Dhcp" and version "4.1-esv" | r10_b1 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.1-esv Search vendor "Isc" for product "Dhcp" and version "4.1-esv" | r10_rc1 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.1-esv Search vendor "Isc" for product "Dhcp" and version "4.1-esv" | r11 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.1-esv Search vendor "Isc" for product "Dhcp" and version "4.1-esv" | r11_b1 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.1-esv Search vendor "Isc" for product "Dhcp" and version "4.1-esv" | r11_rc1 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.1-esv Search vendor "Isc" for product "Dhcp" and version "4.1-esv" | r11_rc2 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.1-esv Search vendor "Isc" for product "Dhcp" and version "4.1-esv" | r12 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.1-esv Search vendor "Isc" for product "Dhcp" and version "4.1-esv" | r12_b1 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.1-esv Search vendor "Isc" for product "Dhcp" and version "4.1-esv" | r12_p1 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.1-esv Search vendor "Isc" for product "Dhcp" and version "4.1-esv" | r13 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.1-esv Search vendor "Isc" for product "Dhcp" and version "4.1-esv" | r13_b1 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.1-esv Search vendor "Isc" for product "Dhcp" and version "4.1-esv" | r14 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.1-esv Search vendor "Isc" for product "Dhcp" and version "4.1-esv" | r14_b1 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.1-esv Search vendor "Isc" for product "Dhcp" and version "4.1-esv" | r15 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.1-esv Search vendor "Isc" for product "Dhcp" and version "4.1-esv" | r2 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.1-esv Search vendor "Isc" for product "Dhcp" and version "4.1-esv" | r3 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.1-esv Search vendor "Isc" for product "Dhcp" and version "4.1-esv" | r3_b1 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.1-esv Search vendor "Isc" for product "Dhcp" and version "4.1-esv" | r4 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.1-esv Search vendor "Isc" for product "Dhcp" and version "4.1-esv" | r5 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.1-esv Search vendor "Isc" for product "Dhcp" and version "4.1-esv" | r5_b1 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.1-esv Search vendor "Isc" for product "Dhcp" and version "4.1-esv" | r5_rc1 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.1-esv Search vendor "Isc" for product "Dhcp" and version "4.1-esv" | r5_rc2 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.1-esv Search vendor "Isc" for product "Dhcp" and version "4.1-esv" | r6 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.1-esv Search vendor "Isc" for product "Dhcp" and version "4.1-esv" | r7 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.1-esv Search vendor "Isc" for product "Dhcp" and version "4.1-esv" | r8 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.1-esv Search vendor "Isc" for product "Dhcp" and version "4.1-esv" | r8_b1 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.1-esv Search vendor "Isc" for product "Dhcp" and version "4.1-esv" | r8_rc1 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.1-esv Search vendor "Isc" for product "Dhcp" and version "4.1-esv" | r9 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.1-esv Search vendor "Isc" for product "Dhcp" and version "4.1-esv" | r9_b1 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.1-esv Search vendor "Isc" for product "Dhcp" and version "4.1-esv" | r9_rc1 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.1-esv Search vendor "Isc" for product "Dhcp" and version "4.1-esv" | rc1 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.1.0 Search vendor "Isc" for product "Dhcp" and version "4.1.0" | - |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.4.0 Search vendor "Isc" for product "Dhcp" and version "4.4.0" | - |
Affected
| ||||||
| Redhat Search vendor "Redhat" | Enterprise Linux Desktop Search vendor "Redhat" for product "Enterprise Linux Desktop" | 6.0 Search vendor "Redhat" for product "Enterprise Linux Desktop" and version "6.0" | - |
Affected
| ||||||
| Redhat Search vendor "Redhat" | Enterprise Linux Desktop Search vendor "Redhat" for product "Enterprise Linux Desktop" | 7.0 Search vendor "Redhat" for product "Enterprise Linux Desktop" and version "7.0" | - |
Affected
| ||||||
| Redhat Search vendor "Redhat" | Enterprise Linux Server Search vendor "Redhat" for product "Enterprise Linux Server" | 6.0 Search vendor "Redhat" for product "Enterprise Linux Server" and version "6.0" | - |
Affected
| ||||||
| Redhat Search vendor "Redhat" | Enterprise Linux Server Search vendor "Redhat" for product "Enterprise Linux Server" | 7.0 Search vendor "Redhat" for product "Enterprise Linux Server" and version "7.0" | - |
Affected
| ||||||
| Redhat Search vendor "Redhat" | Enterprise Linux Server Aus Search vendor "Redhat" for product "Enterprise Linux Server Aus" | 7.4 Search vendor "Redhat" for product "Enterprise Linux Server Aus" and version "7.4" | - |
Affected
| ||||||
| Redhat Search vendor "Redhat" | Enterprise Linux Server Aus Search vendor "Redhat" for product "Enterprise Linux Server Aus" | 7.6 Search vendor "Redhat" for product "Enterprise Linux Server Aus" and version "7.6" | - |
Affected
| ||||||
| Redhat Search vendor "Redhat" | Enterprise Linux Server Eus Search vendor "Redhat" for product "Enterprise Linux Server Eus" | 7.4 Search vendor "Redhat" for product "Enterprise Linux Server Eus" and version "7.4" | - |
Affected
| ||||||
| Redhat Search vendor "Redhat" | Enterprise Linux Server Eus Search vendor "Redhat" for product "Enterprise Linux Server Eus" | 7.5 Search vendor "Redhat" for product "Enterprise Linux Server Eus" and version "7.5" | - |
Affected
| ||||||
| Redhat Search vendor "Redhat" | Enterprise Linux Server Eus Search vendor "Redhat" for product "Enterprise Linux Server Eus" | 7.6 Search vendor "Redhat" for product "Enterprise Linux Server Eus" and version "7.6" | - |
Affected
| ||||||
| Redhat Search vendor "Redhat" | Enterprise Linux Workstation Search vendor "Redhat" for product "Enterprise Linux Workstation" | 6.0 Search vendor "Redhat" for product "Enterprise Linux Workstation" and version "6.0" | - |
Affected
| ||||||
| Redhat Search vendor "Redhat" | Enterprise Linux Workstation Search vendor "Redhat" for product "Enterprise Linux Workstation" | 7.0 Search vendor "Redhat" for product "Enterprise Linux Workstation" and version "7.0" | - |
Affected
| ||||||
| Canonical Search vendor "Canonical" | Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux" | 14.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "14.04" | lts |
Affected
| ||||||
| Canonical Search vendor "Canonical" | Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux" | 16.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "16.04" | lts |
Affected
| ||||||
| Canonical Search vendor "Canonical" | Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux" | 17.10 Search vendor "Canonical" for product "Ubuntu Linux" and version "17.10" | - |
Affected
| ||||||
| Debian Search vendor "Debian" | Debian Linux Search vendor "Debian" for product "Debian Linux" | 7.0 Search vendor "Debian" for product "Debian Linux" and version "7.0" | - |
Affected
| ||||||
| Debian Search vendor "Debian" | Debian Linux Search vendor "Debian" for product "Debian Linux" | 8.0 Search vendor "Debian" for product "Debian Linux" and version "8.0" | - |
Affected
| ||||||
| Debian Search vendor "Debian" | Debian Linux Search vendor "Debian" for product "Debian Linux" | 9.0 Search vendor "Debian" for product "Debian Linux" and version "9.0" | - |
Affected
| ||||||