漏洞描述
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.
影响产品
修复建议
建议关注厂商安全公告，及时升级至已修复版本，并结合实际资产暴露情况采取缓解措施。
参考链接
access.redhat.comhttps://access.redhat.com/errata/RHSA-2019:1602↗support.f5.comhttps://support.f5.com/csp/article/K78234183↗www.huawei.comhttp://www.huawei.com/en/psirt/security-advisories/huawei-sa-20191225-01-kernel-en↗access.redhat.comhttps://access.redhat.com/security/vulnerabilities/tcpsack↗kc.mcafee.comhttps://kc.mcafee.com/corporate/index?page=content&id=SB10287↗www.oracle.comhttps://www.oracle.com/security-alerts/cpuoct2020.html↗www.us-cert.govhttps://www.us-cert.gov/ics/advisories/icsa-19-253-03↗www.openwall.comhttp://www.openwall.com/lists/oss-security/2019/10/29/3↗www.kb.cert.orghttps://www.kb.cert.org/vuls/id/905115↗access.redhat.comhttps://access.redhat.com/errata/RHSA-2019:1699↗github.comhttps://github.com/Netflix/security-bulletins/blob/master/advisories/third-party/2019-001.md↗www.vmware.comhttp://www.vmware.com/security/advisories/VMSA-2019-0010.html↗www.openwall.comhttp://www.openwall.com/lists/oss-security/2019/06/28/2↗kb.pulsesecure.nethttps://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44193↗packetstormsecurity.comhttp://packetstormsecurity.com/files/153346/Kernel-Live-Patch-Security-Notice-LSN-0052-1.html↗psirt.global.sonicwall.comhttps://psirt.global.sonicwall.com/vuln-detail/SNWLID-2019-0006↗access.redhat.comhttps://access.redhat.com/errata/RHSA-2019:1594↗packetstormsecurity.comhttp://packetstormsecurity.com/files/154951/Kernel-Live-Patch-Security-Notice-LSN-0058-1.html↗git.kernel.orghttps://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git/commit/?id=3b4929f65b0d8249f19a50245cd88ed1a2f78cff↗cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/pdf/ssa-462066.pdf↗wiki.ubuntu.comhttps://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/SACKPanic↗www.openwall.comhttp://www.openwall.com/lists/oss-security/2019/10/24/1↗security.netapp.comhttps://security.netapp.com/advisory/ntap-20190625-0001/↗www.openwall.comhttp://www.openwall.com/lists/oss-security/2019/07/06/4↗www.synology.comhttps://www.synology.com/security/advisory/Synology_SA_19_28↗www.openwall.comhttp://www.openwall.com/lists/oss-security/2019/07/06/3↗www.oracle.comhttps://www.oracle.com/security-alerts/cpujan2020.html↗www.openwall.comhttp://www.openwall.com/lists/oss-security/2019/06/20/3↗www.arubanetworks.comhttp://www.arubanetworks.com/assets/alert/ARUBA-PSA-2020-010.txt↗