Linux Linux, Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION, Red Hat Enterprise Linux 7 Extended Lifecycle Support 취약점
In the Linux kernel, the following vulnerability has been resolved: net/sched: Enforce that teql can only be used as root qdisc Design intent of teql is that it is only supposed to be used as root qdisc. We need to check for that constraint. Although not important, I will describe the scenario that unearthed this issue for the curious. GangMin Kim <km.kim1503@gmail.com> managed to concot a scenario as follows: ROOT qdisc 1:0 (QFQ) ├── class 1:1 (weight=15, lmax=16384) netem with delay 6.4s └── class 1:2 (weight=1, lmax=1514) teql GangMin sends a packet which is enqueued to 1:1 (netem). Any...
In the Linux kernel, the following vulnerability has been resolved: net/sched: Enforce that teql can only be used as root qdisc Design intent of teql is that it is only supposed to be used as root qdisc. We need to check for that constraint. Although not important, I will describe the scenario that unearthed this issue for the curious. GangMin Kim <km.kim1503@gmail.com> managed to concot a scenario as follows: ROOT qdisc 1:0 (QFQ) ├── class 1:1 (weight=15, lmax=16384) netem with delay 6.4s └── class 1:2 (weight=1, lmax=1514) teql GangMin sends a packet which is enqueued to 1:1 (netem). Any...
영향 제품·버전
제품 Linux Linux, Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION, Red Hat Enterprise Linux 7 Extended Lifecycle Support
영향 버전 Linux Linux, Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION, Red Hat Enterprise Linux 7 Extended Lifecycle Support >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 73d970ff0eddd874a84c953387c7f4464b705fc6, >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < ae810e6a8ac4fe25042e6825d2a401207a2e41fb, >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < dad49a67c2d817bfec98e6e45121b351e3a0202c, >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 0686bedfed34155520f3f735cbf3210cb9044380, >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 4c7e8aa71c9232cba84c289b4b56cba80b280841, >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 16ed73c1282d376b956bff23e5139add061767ba, >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 50da4b9d07a7a463e2cfb738f3ad4cff6b2c9c3b, >= 2.6.12, >= 2.6.12.1 < 5.10.249, >= 5.11 < 5.15.199, >= 5.16 < 6.1.162, >= 6.2 < 6.6.122, >= 6.7 < 6.12.68, >= 6.13 < 6.18.8, 2.6.12, 6.19
수정 버전 Linux Linux, Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION, Red Hat Enterprise Linux 7 Extended Lifecycle Support 5.10.249, 5.15.199, 6.1.162, 6.6.122, 6.12.68, 6.18.8
Linux Linux, Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION, Red Hat Enterprise Linux 7 Extended Lifecycle Support의 현재 전체 버전이 공식 영향 범위(Linux Linux, Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION, Red Hat Enterprise Linux 7 Extended Lifecycle Support >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 73d970ff0eddd874a84c953387c7f4464b705fc6, >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < ae810e6a8ac4fe25042e6825d2a401207a2e41fb, >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < dad49a67c2d817bfec98e6e45121b351e3a0202c, >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 0686bedfed34155520f3f735cbf3210cb9044380, >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 4c7e8aa71c9232cba84c289b4b56cba80b280841, >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 16ed73c1282d376b956bff23e5139add061767ba, >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 50da4b9d07a7a463e2cfb738f3ad4cff6b2c9c3b, >= 2.6.12, >= 2.6.12.1 < 5.10.249, >= 5.11 < 5.15.199, >= 5.16 < 6.1.162, >= 6.2 < 6.6.122, >= 6.7 < 6.12.68, >= 6.13 < 6.18.8, 2.6.12, 6.19)에 포함되는지 확인합니다. OS를 선택하면 해당 OS의 제품·패키지·KB·APAR 확인 명령만 표시됩니다.
조치방안
제3자 참조와 수정 버전 값(5.10.249, 5.15.199, 6.1.162, 6.6.122, 6.12.68, 6.18.8)은 보조 근거로만 사용하고, 공급사 공식 보안 권고에서 조치 기준을 재확인합니다.
조치 후 확인사항
패치 후 같은 명령으로 전체 버전을 다시 확인해 Linux Linux, Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION, Red Hat Enterprise Linux 7 Extended Lifecycle Support 5.10.249, 5.15.199, 6.1.162, 6.6.122, 6.12.68, 6.18.8 기준을 충족하는지 확인합니다. 이어서 메모리 손상 관련 오류·공격 흔적이 새로 발생하지 않는지 확인합니다.
