Out-of-bounds read in Linux kernel - CVE-2017-6347
Published: June 20, 2024
Vulnerability identifier: #VU92486
CSH Severity: Low
CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2017-6347
CWE-ID: CWE-125
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to gain access to sensitive information.
The vulnerability exists due to a boundary error within the ip_cmsg_recv_checksum() function in net/ipv4/ip_sockglue.c when using the MSG_MORE flag in conjunction with loopback UDP transmission. A local user can trigger an out-of-bounds read error and gain access to sensitive information.
Affected software
Linux kernel
Fedora
kernel
Fedora
kernel
How to mitigate CVE-2017-6347
Install update from vendor's website.
Linux kernel - update to 4.10.1
kernel - addressed in versions 4.9.13-100.fc24, 4.9.13-200.fc25
kernel - addressed in versions 4.9.13-100.fc24, 4.9.13-200.fc25
External References
- https://github.com/torvalds/linux/commit/ca4ef4574f1ee5252e2cd365f8f5d5bafd048f32
- https://bugzilla.redhat.com/show_bug.cgi?id=1427984
- http://www.openwall.com/lists/oss-security/2017/02/28/5
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.10.1
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=ca4ef4574f1ee5252e2cd365f8f5d5bafd048f32
- http://www.securityfocus.com/bid/96487