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CVE-2017-1000112

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 2.6.15 < 3.10.108
Linux ≫ Linux Kernel Version >= 3.11 < 3.16.47
Linux ≫ Linux Kernel Version >= 3.17 < 3.18.65
Linux ≫ Linux Kernel Version >= 3.19 < 4.4.82
Linux ≫ Linux Kernel Version >= 4.5 < 4.9.43
Linux ≫ Linux Kernel Version >= 4.10 < 4.12.7
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 20.8% 0.972
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 7 1 5.9
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
nvd@nist.gov 6.9 3.4 10
AV:L/AC:M/Au:N/C:C/I:C/A:C
CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.

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