Home CVE Database CVE-2017-1000112

CVE-2017-1000112

Description

A memory corruption issue was found in the Linux kernel. 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.

Priority: MEDIUM
CVSS v3: 7
Publish Date: Aug 27, 2017
Related ID: --
CVSS v2: High
Modified Date: Aug 27, 2017

Find out more about CVE-2017-1000112 from the MITRE-CVE dictionary and NIST NVD


Products Affected

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Related Products

Product Name Status Defect Fixed Downloads
Linux 7 SCP Not Vulnerable -- -- --
Linux 7 CGP Not Vulnerable -- -- --

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