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CVE
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CVE-2016-4557Date: (C)2016-06-02   (M)2023-12-22


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.

CVSS Score and Metrics +CVSS Score and Metrics -

CVSS V3 Severity:CVSS V2 Severity:
CVSS Score : 7.8CVSS Score : 7.2
Exploit Score: 1.8Exploit Score: 3.9
Impact Score: 5.9Impact Score: 10.0
 
CVSS V3 Metrics:CVSS V2 Metrics:
Attack Vector: LOCALAccess Vector: LOCAL
Attack Complexity: LOWAccess Complexity: LOW
Privileges Required: LOWAuthentication: NONE
User Interaction: NONEConfidentiality: COMPLETE
Scope: UNCHANGEDIntegrity: COMPLETE
Confidentiality: HIGHAvailability: COMPLETE
Integrity: HIGH 
Availability: HIGH 
  
Reference:
EXPLOIT-DB-40759
http://www.openwall.com/lists/oss-security/2016/05/06/4
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=8358b02bf67d3a5d8a825070e1aa73f25fb2e4c7
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.5.5
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
openSUSE-SU-2016:1641

OVAL    11
oval:org.secpod.oval:def:110576
oval:org.secpod.oval:def:110596
oval:org.secpod.oval:def:1600403
oval:org.secpod.oval:def:52765
...

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