PT-2017-3739 · Linux+3 · Linux Kernel+3

Shi Lei · Published 2017-04-27 · Updated 2023-02-14 · CVE-2017-7482

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions: Linux kernel versions prior to 4.12

Description: The issue is related to the implementation of the Kerberos 5 protocol in the Linux kernel, specifically with the handling of RXRPC keys. It could lead to a buffer overflow when decoding Kerberos 5 tickets, potentially causing memory corruption and possible privilege escalation. The vulnerability may allow an attacker to elevate their privileges or cause a denial of service.

Recommendations: For Linux kernel versions prior to 4.12, update to version 4.12 or later to resolve the issue. As a temporary workaround, consider restricting access to the Kerberos 5 protocol or disabling the use of RXRPC keys until a patch is available.

Fix

Integer Overflow

Weakness Enumeration

CWE-190

Related Identifiers

ALT-PU-2017-1817

ALT-PU-2017-1854

BDU:2019-00227

CVE-2017-7482

DLA-1099-1

DSA-3927-1

DSA-3945-1

OPENSUSE-SU-2017_3358-1

OPENSUSE-SU-2017_3359-1

RHSA-2019:0641

SUSE-SU-2017:2342-1

SUSE-SU-2017:2389-1

SUSE-SU-2017:2525-1

SUSE-SU-2017:2908-1

SUSE-SU-2017:2920-1

SUSE-SU-2017:3398-1

SUSE-SU-2017:3410-1

SUSE-SU-2018:0213-1

USN-3377-1

USN-3377-2

USN-3378-1

USN-3378-2

USN-3381-1

USN-3381-2

Affected Products

Alt Linux

Linux Kernel

Suse

Ubuntu

References · 610

• https://osv.dev/vulnerability/DSA-3927-1 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2017-7482 · Vendor Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-7482 · Patch
• http://seclists.org/oss-sec/2017/q2/602 · Patch
• https://security-tracker.debian.org/tracker/CVE-2017-7482 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2017:3398-1 · Vendor Advisory
• https://ubuntu.com/security/notices/USN-3381-2 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2017-7482 · Vendor Advisory
• https://osv.dev/vulnerability/DSA-3945-1 · Vendor Advisory
• https://osv.dev/vulnerability/USN-3381-1 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2017-7482 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2017:2525-1 · Vendor Advisory
• https://osv.dev/vulnerability/USN-3378-1 · Vendor Advisory
• https://ubuntu.com/security/notices/USN-3381-1 · Vendor Advisory
• https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=5f2f97656ada8d811d3c1bef503ced266fcd53a0 · Vendor Advisory