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    CVE-2018-5391

    The Linux kernel, versions 3.9+, is vulnerable to a denial of service attack with low rates of specially modified packets targeting IP fragment re-assembly. An attacker may cause a denial of service condition by sending specially crafted IP fragments. Various vulnerabilities in IP fragmentation have been discovered and fixed over the years. The current vulnerability (CVE-2018-5391) became exploitable in the Linux kernel with the increase of the IP fragment reassembly queue size.

    Published:Aug 14, 2018
    Last Modified:Nov 21, 2024
    EPS:Sep 6, 2018
    EPSS Score:0.05017
    CVSS Score:7.5

    Affected Products

    Vendor
    Canonical
    Product
    Ubuntu Linux
    Vendor
    Debian
    Product
    Debian Linux
    Vendor
    F5
    Product
    Big-ip Access Policy Manager
    Vendor
    F5
    Product
    Big-ip Advanced Firewall Manager
    Vendor
    F5
    Product
    Big-ip Analytics
    Vendor
    F5
    Product
    Big-ip Application Acceleration Manager
    Vendor
    F5
    Product
    Big-ip Application Security Manager
    Vendor
    F5
    Product
    Big-ip Domain Name System
    Vendor
    F5
    Product
    Big-ip Edge Gateway
    Vendor
    F5
    Product
    Big-ip Fraud Protection Service
    Vendor
    F5
    Product
    Big-ip Global Traffic Manager
    Vendor
    F5
    Product
    Big-ip Link Controller
    Vendor
    F5
    Product
    Big-ip Local Traffic Manager
    Vendor
    F5
    Product
    Big-ip Policy Enforcement Manager
    Vendor
    F5
    Product
    Big-ip Webaccelerator
    Vendor
    Linux
    Product
    Linux Kernel
    Vendor
    Microsoft
    Product
    Windows 10
    Vendor
    Microsoft
    Product
    Windows 7
    Vendor
    Microsoft
    Product
    Windows 8.1
    Vendor
    Microsoft
    Product
    Windows Rt 8.1
    Vendor
    Microsoft
    Product
    Windows Server 2008
    Vendor
    Microsoft
    Product
    Windows Server 2012
    Vendor
    Microsoft
    Product
    Windows Server 2016
    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    Redhat
    Product
    Enterprise Linux Desktop
    Vendor
    Redhat
    Product
    Enterprise Linux Server
    Vendor
    Redhat
    Product
    Enterprise Linux Server Aus
    Vendor
    Redhat
    Product
    Enterprise Linux Server Eus
    Vendor
    Redhat
    Product
    Enterprise Linux Server Tus
    Vendor
    Redhat
    Product
    Enterprise Linux Workstation
    Vendor
    Redhat
    Product
    Enterprise Mrg
    Vendor
    Redhat
    Product
    Rhel Aus
    Vendor
    Redhat
    Product
    Rhel E4s
    Vendor
    Redhat
    Product
    Rhel Eus
    Vendor
    Redhat
    Product
    Rhel Extras Rt
    Vendor
    Redhat
    Product
    Rhel Tus
    Vendor
    Siemens
    Product
    Ruggedcom Rm1224
    Vendor
    Siemens
    Product
    Ruggedcom Rm1224 Firmware
    Vendor
    Siemens
    Product
    Ruggedcom Rox Ii
    Vendor
    Siemens
    Product
    Ruggedcom Rox Ii Firmware
    Vendor
    Siemens
    Product
    Scalance M-800
    Vendor
    Siemens
    Product
    Scalance M-800 Firmware
    Vendor
    Siemens
    Product
    Scalance S615
    Vendor
    Siemens
    Product
    Scalance S615 Firmware
    Vendor
    Siemens
    Product
    Scalance Sc-600
    Vendor
    Siemens
    Product
    Scalance Sc-600 Firmware
    Vendor
    Siemens
    Product
    Scalance W1700 Ieee 802.11ac
    Vendor
    Siemens
    Product
    Scalance W1700 Ieee 802.11ac Firmware
    Vendor
    Siemens
    Product
    Scalance W700 Ieee 802.11a\/b\/g\/n
    Vendor
    Siemens
    Product
    Scalance W700 Ieee 802.11a\/b\/g\/n Firmware
    Vendor
    Siemens
    Product
    Simatic Net Cp 1242-7
    Vendor
    Siemens
    Product
    Simatic Net Cp 1242-7 Firmware
    Vendor
    Siemens
    Product
    Simatic Net Cp 1243-1
    Vendor
    Siemens
    Product
    Simatic Net Cp 1243-1 Firmware
    Vendor
    Siemens
    Product
    Simatic Net Cp 1243-7 Lte Eu
    Vendor
    Siemens
    Product
    Simatic Net Cp 1243-7 Lte Eu Firmware
    Vendor
    Siemens
    Product
    Simatic Net Cp 1243-7 Lte Us
    Vendor
    Siemens
    Product
    Simatic Net Cp 1243-7 Lte Us Firmware
    Vendor
    Siemens
    Product
    Simatic Net Cp 1243-8 Irc
    Vendor
    Siemens
    Product
    Simatic Net Cp 1243-8 Irc Firmware
    Vendor
    Siemens
    Product
    Simatic Net Cp 1542sp-1
    Vendor
    Siemens
    Product
    Simatic Net Cp 1542sp-1 Firmware
    Vendor
    Siemens
    Product
    Simatic Net Cp 1542sp-1 Irc
    Vendor
    Siemens
    Product
    Simatic Net Cp 1542sp-1 Irc Firmware
    Vendor
    Siemens
    Product
    Simatic Net Cp 1543-1
    Vendor
    Siemens
    Product
    Simatic Net Cp 1543-1 Firmware
    Vendor
    Siemens
    Product
    Simatic Net Cp 1543sp-1
    Vendor
    Siemens
    Product
    Simatic Net Cp 1543sp-1 Firmware
    Vendor
    Siemens
    Product
    Simatic Rf185c
    Vendor
    Siemens
    Product
    Simatic Rf185c Firmware
    Vendor
    Siemens
    Product
    Simatic Rf186c
    Vendor
    Siemens
    Product
    Simatic Rf186c Firmware
    Vendor
    Siemens
    Product
    Simatic Rf186ci
    Vendor
    Siemens
    Product
    Simatic Rf186ci Firmware
    Vendor
    Siemens
    Product
    Simatic Rf188
    Vendor
    Siemens
    Product
    Simatic Rf188 Firmware
    Vendor
    Siemens
    Product
    Simatic Rf188ci
    Vendor
    Siemens
    Product
    Simatic Rf188ci Firmware
    Vendor
    Siemens
    Product
    Sinema Remote Connect Server
    Vendor
    Siemens
    Product
    Sinema Remote Connect Server Firmware

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-10 Buffer Overflow via Environment Variables
    CAPEC-101 Server Side Include (SSI) Injection
    CAPEC-104 Cross Zone Scripting
    CAPEC-108 Command Line Execution through SQL Injection
    CAPEC-109 Object Relational Mapping Injection
    CAPEC-110 SQL Injection through SOAP Parameter Tampering
    CAPEC-120 Double Encoding
    CAPEC-13 Subverting Environment Variable Values
    CAPEC-135 Format String Injection
    CAPEC-136 LDAP Injection
    CAPEC-14 Client-side Injection-induced Buffer Overflow
    CAPEC-147 XML Ping of the Death
    CAPEC-153 Input Data Manipulation
    CAPEC-182 Flash Injection
    CAPEC-209 XSS Using MIME Type Mismatch
    CAPEC-22 Exploiting Trust in Client
    CAPEC-227 Sustained Client Engagement
    CAPEC-23 File Content Injection
    CAPEC-230 Serialized Data with Nested Payloads
    CAPEC-231 Oversized Serialized Data Payloads
    CAPEC-24 Filter Failure through Buffer Overflow
    CAPEC-250 XML Injection
    CAPEC-261 Fuzzing for garnering other adjacent user/sensitive data
    CAPEC-267 Leverage Alternate Encoding
    CAPEC-28 Fuzzing
    CAPEC-3 Using Leading 'Ghost' Character Sequences to Bypass Input Filters
    CAPEC-31 Accessing/Intercepting/Modifying HTTP Cookies
    CAPEC-42 MIME Conversion
    CAPEC-43 Exploiting Multiple Input Interpretation Layers
    CAPEC-45 Buffer Overflow via Symbolic Links
    CAPEC-46 Overflow Variables and Tags
    CAPEC-47 Buffer Overflow via Parameter Expansion
    CAPEC-473 Signature Spoof
    CAPEC-492 Regular Expression Exponential Blowup
    CAPEC-52 Embedding NULL Bytes
    CAPEC-53 Postfix, Null Terminate, and Backslash
    CAPEC-588 DOM-Based XSS
    CAPEC-63 Cross-Site Scripting (XSS)
    CAPEC-64 Using Slashes and URL Encoding Combined to Bypass Validation Logic
    CAPEC-664 Server Side Request Forgery
    CAPEC-67 String Format Overflow in syslog()
    CAPEC-7 Blind SQL Injection
    CAPEC-71 Using Unicode Encoding to Bypass Validation Logic
    CAPEC-72 URL Encoding
    CAPEC-73 User-Controlled Filename
    CAPEC-78 Using Escaped Slashes in Alternate Encoding
    CAPEC-79 Using Slashes in Alternate Encoding
    CAPEC-8 Buffer Overflow in an API Call
    CAPEC-80 Using UTF-8 Encoding to Bypass Validation Logic
    CAPEC-81 Web Server Logs Tampering
    CAPEC-83 XPath Injection
    CAPEC-85 AJAX Footprinting
    CAPEC-88 OS Command Injection
    CAPEC-9 Buffer Overflow in Local Command-Line Utilities

    Related CVEs

    CVE-2026-13476 (CVSS 7.3) — IBM Informix Dynamic Server 14.10, 15.0, and 12.10 could allow an unauthenticated user to execute arbitrary co…
    CVE-2026-13367 (CVSS 7.8) — IBM Informix Dynamic Server 14.10, and 15.0 contain a local privilege escalation vulnerability in the oninit s…
    CVE-2026-47337 (CVSS 3.3) — Ubuntu Linux 6.8, 6.17 and 7.0 contain SAUCE patches with a possible NULL pointer dereference in the handling …
    CVE-2026-47336 (CVSS 3.3) — Ubuntu Linux 6.8 contains SAUCE patches with a possible use of an uninitialized variable in AppArmor AF_INET/A…
    CVE-2026-47335 (CVSS 5.5) — Ubuntu Linux 6.8 contains SAUCE patches with a possible NULL pointer dereference in the handling of AppArmor n…
    CVE-2026-47334 (CVSS 5.5) — Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which incorrectly sleep while holding a spinlock…
    CVE-2026-47333 (CVSS 7.8) — Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which can potentially incorrectly compute the si…
    CVE-2026-47332 (CVSS 5.5) — Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which incorrectly validate the size of an intern…
    CVE-2026-47331 (CVSS 7.8) — Ubuntu Linux 6.8 contains AppArmor SAUCE patches which fail to acquire a lock when modifying a linked list. An…
    CVE-2026-47330 (CVSS 3.3) — Ubuntu Linux 6.8, 7.17 and 7.0 contain AppArmor SAUCE patches which can, under certain circumstances, use an u…

    References

    http://www.arubanetworks.com/assets/alert/ARUBA-PSA-2018-004.txt
    http://www.huawei.com/en/psirt/security-advisories/huawei-sa-20200115-01-linux-en
    http://www.openwall.com/lists/oss-security/2019/06/28/2
    http://www.openwall.com/lists/oss-security/2019/07/06/3
    http://www.openwall.com/lists/oss-security/2019/07/06/4
    http://www.securityfocus.com/bid/105108
    http://www.securitytracker.com/id/1041476
    http://www.securitytracker.com/id/1041637
    https://access.redhat.com/errata/RHSA-2018:2785
    https://access.redhat.com/errata/RHSA-2018:2791
    https://access.redhat.com/errata/RHSA-2018:2846
    https://access.redhat.com/errata/RHSA-2018:2924
    https://access.redhat.com/errata/RHSA-2018:2925
    https://access.redhat.com/errata/RHSA-2018:2933
    https://access.redhat.com/errata/RHSA-2018:2948
    https://access.redhat.com/errata/RHSA-2018:3083
    https://access.redhat.com/errata/RHSA-2018:3096
    https://access.redhat.com/errata/RHSA-2018:3459
    https://access.redhat.com/errata/RHSA-2018:3540
    https://access.redhat.com/errata/RHSA-2018:3586
    https://access.redhat.com/errata/RHSA-2018:3590
    https://cert-portal.siemens.com/productcert/pdf/ssa-377115.pdf
    https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git/commit/?id=c30f1fc041b74ecdb072dd44f858750414b8b19f
    https://lists.debian.org/debian-lts-announce/2018/08/msg00014.html
    https://lists.debian.org/debian-lts-announce/2019/03/msg00017.html
    https://security.netapp.com/advisory/ntap-20181003-0002/
    https://support.f5.com/csp/article/K74374841?utm_source=f5support&amp%3Butm_medium=RSS
    https://usn.ubuntu.com/3740-1/
    https://usn.ubuntu.com/3740-2/
    https://usn.ubuntu.com/3741-1/
    https://usn.ubuntu.com/3741-2/
    https://usn.ubuntu.com/3742-1/
    https://usn.ubuntu.com/3742-2/
    https://www.debian.org/security/2018/dsa-4272
    https://www.kb.cert.org/vuls/id/641765
    http://www.arubanetworks.com/assets/alert/ARUBA-PSA-2018-004.txt
    http://www.huawei.com/en/psirt/security-advisories/huawei-sa-20200115-01-linux-en
    http://www.openwall.com/lists/oss-security/2019/06/28/2
    http://www.openwall.com/lists/oss-security/2019/07/06/3
    http://www.openwall.com/lists/oss-security/2019/07/06/4
    http://www.securityfocus.com/bid/105108
    http://www.securitytracker.com/id/1041476
    http://www.securitytracker.com/id/1041637
    https://access.redhat.com/errata/RHSA-2018:2785
    https://access.redhat.com/errata/RHSA-2018:2791
    https://access.redhat.com/errata/RHSA-2018:2846
    https://access.redhat.com/errata/RHSA-2018:2924
    https://access.redhat.com/errata/RHSA-2018:2925
    https://access.redhat.com/errata/RHSA-2018:2933
    https://access.redhat.com/errata/RHSA-2018:2948
    https://access.redhat.com/errata/RHSA-2018:3083
    https://access.redhat.com/errata/RHSA-2018:3096
    https://access.redhat.com/errata/RHSA-2018:3459
    https://access.redhat.com/errata/RHSA-2018:3540
    https://access.redhat.com/errata/RHSA-2018:3586
    https://access.redhat.com/errata/RHSA-2018:3590
    https://cert-portal.siemens.com/productcert/pdf/ssa-377115.pdf
    https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git/commit/?id=c30f1fc041b74ecdb072dd44f858750414b8b19f
    https://lists.debian.org/debian-lts-announce/2018/08/msg00014.html
    https://lists.debian.org/debian-lts-announce/2019/03/msg00017.html
    https://security.netapp.com/advisory/ntap-20181003-0002/
    https://support.f5.com/csp/article/K74374841?utm_source=f5support&amp%3Butm_medium=RSS
    https://usn.ubuntu.com/3740-1/
    https://usn.ubuntu.com/3740-2/
    https://usn.ubuntu.com/3741-1/
    https://usn.ubuntu.com/3741-2/
    https://usn.ubuntu.com/3742-1/
    https://usn.ubuntu.com/3742-2/
    https://www.debian.org/security/2018/dsa-4272
    https://www.kb.cert.org/vuls/id/641765

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High