CVE - CVE-2017-1000112

CVE-ID
CVE-2017-1000112	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
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.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
EXPLOIT-DB:45147 URL:https://www.exploit-db.com/exploits/45147/ MLIST:[oss-security] 20170810 Linux kernel: CVE-2017-1000112: Exploitable memory corruption due to UFO to non-UFO path switch URL:http://seclists.org/oss-sec/2017/q3/277 MISC:https://github.com/xairy/kernel-exploits/tree/master/CVE-2017-1000112 DEBIAN:DSA-3981 URL:http://www.debian.org/security/2017/dsa-3981 REDHAT:RHSA-2017:3200 URL:https://access.redhat.com/errata/RHSA-2017:3200 REDHAT:RHSA-2017:2918 URL:https://access.redhat.com/errata/RHSA-2017:2918 REDHAT:RHSA-2017:2930 URL:https://access.redhat.com/errata/RHSA-2017:2930 REDHAT:RHSA-2017:2931 URL:https://access.redhat.com/errata/RHSA-2017:2931 BID:100262 URL:http://www.securityfocus.com/bid/100262 SECTRACK:1039162 URL:http://www.securitytracker.com/id/1039162
Assigning CNA
Distributed Weakness Filing Project
Date Entry Created
20171003	Disclaimer: The entry creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20171003)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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