Medium severity · published May 17, 2012
CVE-2011-4112
The net subsystem in the Linux kernel before 3.1 does not properly restrict use of the IFF_TX_SKB_SHARING flag, which allows local users to cause a denial of service (panic) by…
5.5
CVSS
0.5%
EPSS
No
On KEV
Description
The net subsystem in the Linux kernel before 3.1 does not properly restrict use of the IFF_TX_SKB_SHARING flag, which allows local users to cause a denial of service (panic) by leveraging the CAP_NET_ADMIN capability to access /proc/net/pktgen/pgctrl, and then using the pktgen package in conjunction with a bridge device for a VLAN interface.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 40% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
KE
Kernel · Linux
before 3.1 · source: NVD
9F
9608 Firmware · Avaya
6.0 through 6.6.0 · source: NVD
9F
9608g Firmware · Avaya
6.0 through 6.6.0 · source: NVD
9F
9611g Firmware · Avaya
6.0 through 6.6.0 · source: NVD
9F
9621g Firmware · Avaya
6.0 through 6.6.0 · source: NVD
9F
9641g Firmware · Avaya
6.0 through 6.6.0 · source: NVD
9F
9641gs Firmware · Avaya
6.0 through 6.6.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2011-4112
CVE.org
https://www.cve.org/CVERecord?id=CVE-2011-4112
Third Party Advisory
http://downloads.avaya.com/css/P8/documents/100156038
git.kernel.org
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=550fd08c2cebad61c548def135f67aba284c6162
Mailing List
http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.1
Mailing List
http://www.openwall.com/lists/oss-security/2011/11/21/4
Exploit
https://bugzilla.redhat.com/show_bug.cgi?id=751006
Patch
https://github.com/torvalds/linux/commit/550fd08c2cebad61c548def135f67aba284c6162
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