vulnwire
5.5med

CVE-2017-91501 exploit

The do_check function in kernel/bpf/verifier.c in the Linux kernel before 4.11.1 does not make the allow_ptr_leaks value available for rest…

Published 9 y ago · modified 4 mo ago · JSON

CVSS
5.5
v3.0 · NVD
CISA KEV
No
not known exploited
EPSS
1.3%
percentile 70%
Public exploits
1
Exploit-DB

The do_check function in kernel/bpf/verifier.c in the Linux kernel before 4.11.1 does not make the allow_ptr_leaks value available for restricting the output of the print_bpf_insn function, which allows local users to obtain sensitive address information via crafted bpf system calls.

Exploit prediction (EPSS)

1.26% probability of exploitation in the next 30 days, higher than 70% of all scored CVEs.

Exploits and detections

  • EDB-42048 Linux Kernel 4.11 - eBPF Verifier Log Leaks Lower Half of map Pointer · dos · 2017-05-22

CVSS scores

Assigned byVersionScoreVector
NVD3.05.5CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
NVD2.02.1AV:L/AC:L/Au:N/C:P/I:N/A:N

Classification

Weakness
  • CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
Technology feeds
Linux kernel (RSS, critical only)

References

  • exploit-db.com /exploits/42048/ · exploit, x_refsource_EXPLOIT-DB, x_transferred
  • git.kernel.org /cgit/linux/kernel/git/torvalds/linux.git/commit/?id=0d0e57697f162da4aa218b5feafe614fb666d · x_refsource_MISC, x_transferred
  • source.android.com /security/bulletin/2017-09-01 · x_refsource_CONFIRM, x_transferred
  • github.com /torvalds/linux/commit/0d0e57697f162da4aa218b5feafe614fb666db07 · x_refsource_MISC, x_transferred
  • securityfocus.com /bid/98635 · vdb-entry, x_refsource_BID, x_transferred
  • bugs.chromium.org /p/project-zero/issues/detail?id=1251 · x_refsource_MISC, x_transferred
  • kernel.org /pub/linux/kernel/v4.x/ChangeLog-4.11.1 · x_refsource_MISC, x_transferred

Sources

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