SB2017020667 - Off-by-one in Linux kernel lib
Published: February 6, 2017
Security Bulletin ID
SB2017020667
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Off-by-one (CVE-ID: CVE-2017-5550)
CWE-ID: CWE-193 - Off-by-one Error
CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a local user to gain access to sensitive information.
The vulnerability exists due to an off-by-one error within the iov_iter_copy_from_user_atomic() and iov_iter_pipe() functions in lib/iov_iter.c. A local user can gain access to sensitive information.
Remediation
Install update from vendor's website.
References
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b9dc6f65bc5e232d1c05fe34b5daadc7e8bbf1fb
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.5
- http://www.openwall.com/lists/oss-security/2017/01/21/3
- http://www.securityfocus.com/bid/95716
- https://bugzilla.redhat.com/show_bug.cgi?id=1416116
- https://github.com/torvalds/linux/commit/b9dc6f65bc5e232d1c05fe34b5daadc7e8bbf1fb