PT-2015-3305 · Linux+1 · Linux Kernel+1

Alexander Popov · Published 2015-09-01 · Updated 2023-01-17 · CVE-2017-13715

Positive Technologies (AI Summary)

CVSS v2.0

10

Critical

Base vector

AV:N/AC:L/Au:N/C:C/I:C/A:C

Name of the Vulnerable Software and Affected Versions Linux kernel versions prior to 4.3

Description The issue is related to the skb flow dissect function in net/core/flow dissector.c, which does not properly initialize n proto, ip proto, and thoff. This allows remote attackers to cause a denial of service (system crash) or possibly execute arbitrary code via a single crafted MPLS packet. The vulnerability is due to insufficient input validation, where the key control protocol returns true without setting values for n proto, ip proto, and thoff.

Recommendations For Linux kernel versions prior to 4.3, update to version 4.3 or later to resolve the issue. As a temporary workaround, consider restricting the handling of MPLS packets to minimize the risk of exploitation.

Fix

DoS

Improper Initialization

RCE

Weakness Enumeration

CWE-665

CWE-20

Related Identifiers

ALT-PU-2015-2010

BDU:2017-02061

CVE-2017-13715

Affected Products

Alt Linux

Linux Kernel

References · 13

• https://github.com/torvalds/linux/commit/a6e544b0a88b53114bfa5a57e21b7be7a8dfc9d0 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2017-13715 · Security Note
• https://cve.org/CVERecord?id=CVE-2017-13715 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2017-13715 · Vendor Advisory
• http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=a6e544b0a88b53114bfa5a57e21b7be7a8dfc9d0 · Vendor Advisory
• https://ubuntu.com/security/CVE-2017-13715 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2017-13715 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2017-13715 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2017-13715 · Vendor Advisory
• https://bdu.fstec.ru/vul/2017-02061 · Security Note
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-13715 · Note
• http://securityfocus.com/bid/100517 · Note
• http://seclists.org/oss-sec/2017/q3/345 · Note