Vulnerability Details CVE-2016-4557
The replace_map_fd_with_map_ptr function in kernel/bpf/verifier.c in the Linux kernel before 4.5.5 does not properly maintain an fd data structure, which allows local users to gain privileges or cause a denial of service (use-after-free) via crafted BPF instructions that reference an incorrect file descriptor.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.161
EPSS Ranking 94.5%
CVSS Severity
CVSS v3 Score 7.8
CVSS v2 Score 7.2
References
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=8358b02bf67d3a5d8a825070e1aa73f25fb2e4c7
- http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00044.html
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.5.5
- http://www.openwall.com/lists/oss-security/2016/05/06/4
- https://bugs.chromium.org/p/project-zero/issues/detail?id=808
- https://bugs.debian.org/823603
- https://bugzilla.redhat.com/show_bug.cgi?id=1334307
- https://github.com/torvalds/linux/commit/8358b02bf67d3a5d8a825070e1aa73f25fb2e4c7
- https://www.exploit-db.com/exploits/40759/
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=8358b02bf67d3a5d8a825070e1aa73f25fb2e4c7
- http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00044.html
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.5.5
- http://www.openwall.com/lists/oss-security/2016/05/06/4
- https://bugs.chromium.org/p/project-zero/issues/detail?id=808
- https://bugs.debian.org/823603
- https://bugzilla.redhat.com/show_bug.cgi?id=1334307
- https://github.com/torvalds/linux/commit/8358b02bf67d3a5d8a825070e1aa73f25fb2e4c7
- https://www.exploit-db.com/exploits/40759/
Products affected by CVE-2016-4557
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cpe:2.3:o:linux:linux_kernel:4.4
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cpe:2.3:o:linux:linux_kernel:4.4.0
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cpe:2.3:o:linux:linux_kernel:4.4.0-96.119
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cpe:2.3:o:linux:linux_kernel:4.4.1
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cpe:2.3:o:linux:linux_kernel:4.4.10
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cpe:2.3:o:linux:linux_kernel:4.4.2
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cpe:2.3:o:linux:linux_kernel:4.4.3
-
cpe:2.3:o:linux:linux_kernel:4.4.4
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cpe:2.3:o:linux:linux_kernel:4.4.5
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cpe:2.3:o:linux:linux_kernel:4.4.6
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cpe:2.3:o:linux:linux_kernel:4.4.7
-
cpe:2.3:o:linux:linux_kernel:4.4.8
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cpe:2.3:o:linux:linux_kernel:4.4.9
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cpe:2.3:o:linux:linux_kernel:4.5
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cpe:2.3:o:linux:linux_kernel:4.5.0
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cpe:2.3:o:linux:linux_kernel:4.5.1
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cpe:2.3:o:linux:linux_kernel:4.5.2
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cpe:2.3:o:linux:linux_kernel:4.5.3
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cpe:2.3:o:linux:linux_kernel:4.5.4