CVE-2017-1000112

Linux kernel: Exploitable memory corruption due to UFO to non-UFO path switch. When building a UFO packet with MSG_MORE __ipappenddata() calls ipufoappenddata() to append. However in between two send() calls, the append path can be switched from UFO to non-UFO one, which leads to a memory corruption. In case UFO packet lengths exceeds MTU, copy = maxfraglen - skb->len becomes negative on the non-UFO path and the branch to allocate new skb is taken. This triggers fragmentation and computation of fraggap = skbprev->len - maxfraglen. Fraggap can exceed MTU, causing copy = datalen - transhdrlen - fraggap to become negative. Subsequently skbcopyandcsumbits() writes out-of-bounds. A similar issue is present in IPv6 code. The bug was introduced in e89e9cf539a2 ("[IPv4/IPv6]: UFO Scatter-gather approach") on Oct 18 2005.

References

Affected packages

Git /

Affected ranges

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2017-1000112.json"

unresolved_ranges

[
    {
        "events": [
            {
                "introduced": "2.6.15"
            },
            {
                "fixed": "3.10.108"
            }
        ]
    },
    {
        "events": [
            {
                "introduced": "3.11"
            },
            {
                "fixed": "3.16.47"
            }
        ]
    },
    {
        "events": [
            {
                "introduced": "3.17"
            },
            {
                "fixed": "3.18.65"
            }
        ]
    },
    {
        "events": [
            {
                "introduced": "3.19"
            },
            {
                "fixed": "4.4.82"
            }
        ]
    },
    {
        "events": [
            {
                "introduced": "4.5"
            },
            {
                "fixed": "4.9.43"
            }
        ]
    },
    {
        "events": [
            {
                "introduced": "4.10"
            },
            {
                "fixed": "4.12.7"
            }
        ]
    }
]