The tcpmssmanglepacket function in net/netfilter/xtTCPMSS.c in the Linux kernel before 4.11, and 4.9.x before 4.9.36, allows remote attackers to cause a denial of service (use-after-free and memory corruption) or possibly have unspecified other impact by leveraging the presence of xtTCPMSS in an iptables action.
[
{
"signature_type": "Function",
"digest": {
"function_hash": "258529677211135581736056381308471737043",
"length": 2288.0
},
"target": {
"file": "net/netfilter/xt_TCPMSS.c",
"function": "tcpmss_mangle_packet"
},
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git@2638fd0f92d4397884fd991d8f4925cb3f081901",
"id": "CVE-2017-18017-67aac2b8",
"deprecated": false,
"signature_version": "v1"
},
{
"signature_type": "Line",
"digest": {
"threshold": 0.9,
"line_hashes": [
"162258670710416702997586488041210628232",
"148964180394642854167106965748630098256",
"15984514308700478718840847737910083897",
"232735794523049691887418241897364459863",
"324155596358226543237301865408864531656",
"230697090639336258677461166945617381557",
"333144358156474064786568956147931082934"
]
},
"target": {
"file": "net/netfilter/xt_TCPMSS.c"
},
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git@2638fd0f92d4397884fd991d8f4925cb3f081901",
"id": "CVE-2017-18017-eea7e029",
"deprecated": false,
"signature_version": "v1"
}
]
[
{
"signature_type": "Line",
"digest": {
"threshold": 0.9,
"line_hashes": [
"162258670710416702997586488041210628232",
"148964180394642854167106965748630098256",
"15984514308700478718840847737910083897",
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"230697090639336258677461166945617381557",
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]
},
"target": {
"file": "net/netfilter/xt_TCPMSS.c"
},
"source": "https://github.com/torvalds/linux/commit/2638fd0f92d4397884fd991d8f4925cb3f081901",
"id": "CVE-2017-18017-54b595aa",
"deprecated": false,
"signature_version": "v1"
},
{
"signature_type": "Function",
"digest": {
"function_hash": "258529677211135581736056381308471737043",
"length": 2288.0
},
"target": {
"file": "net/netfilter/xt_TCPMSS.c",
"function": "tcpmss_mangle_packet"
},
"source": "https://github.com/torvalds/linux/commit/2638fd0f92d4397884fd991d8f4925cb3f081901",
"id": "CVE-2017-18017-b06ea2bf",
"deprecated": false,
"signature_version": "v1"
}
]