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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2017-1000112 Detail

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.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
http://seclists.org/oss-sec/2017/q3/277 CVE, MITRE Mailing List  Patch  Third Party Advisory 
http://www.debian.org/security/2017/dsa-3981 CVE, MITRE Third Party Advisory 
http://www.securityfocus.com/bid/100262 CVE, MITRE Third Party Advisory  VDB Entry 
http://www.securitytracker.com/id/1039162 CVE, MITRE Third Party Advisory  VDB Entry 
https://access.redhat.com/errata/RHSA-2017:2918 CVE, MITRE Third Party Advisory 
https://access.redhat.com/errata/RHSA-2017:2930 CVE, MITRE Third Party Advisory 
https://access.redhat.com/errata/RHSA-2017:2931 CVE, MITRE Third Party Advisory 
https://access.redhat.com/errata/RHSA-2017:3200 CVE, MITRE Third Party Advisory 
https://access.redhat.com/errata/RHSA-2019:1931 CVE, MITRE Third Party Advisory 
https://access.redhat.com/errata/RHSA-2019:1932 CVE, MITRE Third Party Advisory 
https://access.redhat.com/errata/RHSA-2019:4159 CVE, MITRE Third Party Advisory 
https://github.com/xairy/kernel-exploits/tree/master/CVE-2017-1000112 CVE, MITRE Third Party Advisory 
https://www.exploit-db.com/exploits/45147/ CVE, MITRE Third Party Advisory  VDB Entry 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') cwe source acceptance level NIST  

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Change History

13 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2017-1000112
NVD Published Date:
10/04/2017
NVD Last Modified:
06/16/2026
Source:
MITRE