CVE Feed

    Dashboard / CVE / CVE-2019-11477

    CVE-2019-11477

    Jonathan Looney discovered that the TCP_SKB_CB(skb)->tcp_gso_segs value was subject to an integer overflow in the Linux kernel when handling TCP Selective Acknowledgments (SACKs). A remote attacker could use this to cause a denial of service. This has been fixed in stable kernel releases 4.4.182, 4.9.182, 4.14.127, 4.19.52, 5.1.11, and is fixed in commit 3b4929f65b0d8249f19a50245cd88ed1a2f78cff.

    Published:Jun 17, 2019
    Last Modified:Nov 21, 2024
    EPS:Jun 18, 2019
    EPSS Score:0.76442
    CVSS Score:7.5

    Affected Products

    Vendor
    Canonical
    Product
    Ubuntu 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
    F5
    Product
    Traffix Signaling Delivery Controller
    Vendor
    Ivanti
    Product
    Connect Secure
    Vendor
    Linux
    Product
    Linux Kernel
    Vendor
    Pulsesecure
    Product
    Pulse Policy Secure
    Vendor
    Pulsesecure
    Product
    Pulse Secure Virtual Application Delivery Controller
    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    Redhat
    Product
    Enterprise Linux Atomic Host
    Vendor
    Redhat
    Product
    Enterprise Linux Aus
    Vendor
    Redhat
    Product
    Enterprise Linux Eus
    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

    Exploits

    https://github.com/sasqwatch/cve-2019-11477-poc

    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://packetstormsecurity.com/files/153346/Kernel-Live-Patch-Security-Notice-LSN-0052-1.html
    http://packetstormsecurity.com/files/154951/Kernel-Live-Patch-Security-Notice-LSN-0058-1.html
    http://www.arubanetworks.com/assets/alert/ARUBA-PSA-2020-010.txt
    http://www.huawei.com/en/psirt/security-advisories/huawei-sa-20191225-01-kernel-en
    http://www.openwall.com/lists/oss-security/2019/06/20/3
    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.openwall.com/lists/oss-security/2019/10/24/1
    http://www.openwall.com/lists/oss-security/2019/10/29/3
    http://www.vmware.com/security/advisories/VMSA-2019-0010.html
    https://access.redhat.com/errata/RHSA-2019:1594
    https://access.redhat.com/errata/RHSA-2019:1602
    https://access.redhat.com/errata/RHSA-2019:1699
    https://access.redhat.com/security/vulnerabilities/tcpsack
    https://cert-portal.siemens.com/productcert/pdf/ssa-462066.pdf
    https://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git/commit/?id=3b4929f65b0d8249f19a50245cd88ed1a2f78cff
    https://github.com/Netflix/security-bulletins/blob/master/advisories/third-party/2019-001.md
    https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44193
    https://kc.mcafee.com/corporate/index?page=content&id=SB10287
    https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2019-0006
    https://security.netapp.com/advisory/ntap-20190625-0001/
    https://support.f5.com/csp/article/K78234183
    https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/SACKPanic
    https://www.kb.cert.org/vuls/id/905115
    https://www.oracle.com/security-alerts/cpujan2020.html
    https://www.oracle.com/security-alerts/cpuoct2020.html
    https://www.synology.com/security/advisory/Synology_SA_19_28
    https://www.us-cert.gov/ics/advisories/icsa-19-253-03
    http://packetstormsecurity.com/files/153346/Kernel-Live-Patch-Security-Notice-LSN-0052-1.html
    http://packetstormsecurity.com/files/154951/Kernel-Live-Patch-Security-Notice-LSN-0058-1.html
    http://www.arubanetworks.com/assets/alert/ARUBA-PSA-2020-010.txt
    http://www.huawei.com/en/psirt/security-advisories/huawei-sa-20191225-01-kernel-en
    http://www.openwall.com/lists/oss-security/2019/06/20/3
    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.openwall.com/lists/oss-security/2019/10/24/1
    http://www.openwall.com/lists/oss-security/2019/10/29/3
    http://www.vmware.com/security/advisories/VMSA-2019-0010.html
    https://access.redhat.com/errata/RHSA-2019:1594
    https://access.redhat.com/errata/RHSA-2019:1602
    https://access.redhat.com/errata/RHSA-2019:1699
    https://access.redhat.com/security/vulnerabilities/tcpsack
    https://cert-portal.siemens.com/productcert/pdf/ssa-462066.pdf
    https://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git/commit/?id=3b4929f65b0d8249f19a50245cd88ed1a2f78cff
    https://github.com/Netflix/security-bulletins/blob/master/advisories/third-party/2019-001.md
    https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44193
    https://kc.mcafee.com/corporate/index?page=content&id=SB10287
    https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2019-0006
    https://security.netapp.com/advisory/ntap-20190625-0001/
    https://support.f5.com/csp/article/K78234183
    https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/SACKPanic
    https://www.kb.cert.org/vuls/id/905115
    https://www.oracle.com/security-alerts/cpujan2020.html
    https://www.oracle.com/security-alerts/cpuoct2020.html
    https://www.synology.com/security/advisory/Synology_SA_19_28
    https://www.us-cert.gov/ics/advisories/icsa-19-253-03

    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