In the Linux kernel, the following vulnerability has been resolved: net: guard timestamp cmsgs to real error queue skbs skb_is_err_queue()
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CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H상세 설명
In the Linux kernel, the following vulnerability has been resolved:
net: guard timestamp cmsgs to real error queue skbs
skb_is_err_queue() treats PACKET_OUTGOING as the sole marker for an skb
from sk_error_queue. That assumption is not true for AF_PACKET sockets:
outgoing packet taps are also delivered to packet sockets with
skb->pkt_type == PACKET_OUTGOING, but their skb->cb is owned by AF_PACKET
instead of struct sock_exterr_skb.
If such an skb is received with timestamping enabled, the generic
timestamp cmsg path can read AF_PACKET control-buffer state as
sock_exterr_skb::opt_stats. With SO_RXQ_OVFL enabled, the packet drop
counter overlaps opt_stats. An odd drop count makes the path emit
SCM_TIMESTAMPING_OPT_STATS with skb->len and skb->data. For non-linear
skbs this copies past the linear head and can trigger hardened usercopy or
disclose adjacent heap contents.
Keep skb_is_err_queue() local to net/socket.c, but make it verify that
the PACKET_OUTGOING marker is paired with the sock_rmem_free destructor
installed by sock_queue_err_skb(). AF_PACKET receive skbs use normal
receive ownership and no longer pass as error-queue skbs, while legitimate
sk_error_queue entries keep the PACKET_OUTGOING marker and sock_rmem_free
ownership.
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영향받는 제품·버전
- linux linux_kernel4.10.14 - 4.11linux
- linux linux_kernel4.11.1 - 5.10.259linux
- linux linux_kernel5.11 - 5.15.210linux
- linux linux_kernel5.16 - 6.1.176linux
- linux linux_kernel6.2 - 6.6.143linux
- linux linux_kernel6.7 - 6.12.94linux
- linux linux_kernel6.13 - 6.18.36linux
- linux linux_kernel6.19 - 7.0.13linux
- linux linux_kernellinux
- linux linux_kernellinux
- linux linux_kernellinux
- linux linux_kernellinux
- linux linux_kernellinux
- linux linux_kernellinux
- linux linux_kernellinux
- linux linux_kernellinux
- linux linux_kernellinux
- linux linux_kernellinux
- linux linux_kernellinux
- linux linux_kernellinux
- linux linux_kernellinux
영향받는 구성 (CPE) 14
- linux linux_kernel≥ 4.10.14 < 4.11cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- linux linux_kernel 4.11cpe:2.3:o:linux:linux_kernel:4.11:-:*:*:*:*:*:*
- linux linux_kernel 4.11cpe:2.3:o:linux:linux_kernel:4.11:rc4:*:*:*:*:*:*
- linux linux_kernel 4.11cpe:2.3:o:linux:linux_kernel:4.11:rc5:*:*:*:*:*:*
- linux linux_kernel 4.11cpe:2.3:o:linux:linux_kernel:4.11:rc6:*:*:*:*:*:*
- linux linux_kernel 4.11cpe:2.3:o:linux:linux_kernel:4.11:rc7:*:*:*:*:*:*
- linux linux_kernel 4.11cpe:2.3:o:linux:linux_kernel:4.11:rc8:*:*:*:*:*:*
- linux linux_kernel 7.1cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*
- linux linux_kernel 7.1cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:*
- linux linux_kernel 7.1cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:*
- linux linux_kernel 7.1cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:*
- linux linux_kernel 7.1cpe:2.3:o:linux:linux_kernel:7.1:rc5:*:*:*:*:*:*
- linux linux_kernel 7.1cpe:2.3:o:linux:linux_kernel:7.1:rc6:*:*:*:*:*:*
- linux linux_kernel 7.1cpe:2.3:o:linux:linux_kernel:7.1:rc7:*:*:*:*:*:*
참고 자료 8
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