PoC Index85,079 CVEs with PoCs

CVE-2017-1000112

HIGH 7.0EPSS 20.8%

Linux kernel: Exploitable memory corruption due to UFO to non-UFO path switch. When building a UFO packet with MSG_MORE __ip_append_data() calls ip_ufo_append_data() 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 = skb_prev->len - maxfraglen. Fraggap can exceed MTU, causing copy = datalen - transhdrlen - fraggap to become negative. Subsequently skb_copy_and_csum_bits() 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.

CVSS v3.1 NVD
7.0 HIGHCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS v2.0 NVD
6.9 MEDIUMAV:L/AC:M/Au:N/C:C/I:C/A:C
EPSS
20.80% chance of exploitation in the next 30 days, 98th percentile
Published
2017-10-04
Updated
2024-08-05

Proof-of-concept exploits (7)

Metasploit modules (1)

ExploitDB entries (3)

Exploit collections (1)

Security advisories

References

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