CVE-2017-18269
CRITICALglibc 2.21-2.27 - Memory Corruption via SSE2-optimized memmove Overlap Check
Title source: llmDescription
An SSE2-optimized memmove implementation for i386 in sysdeps/i386/i686/multiarch/memcpy-sse2-unaligned.S in the GNU C Library (aka glibc or libc6) 2.21 through 2.27 does not correctly perform the overlapping memory check if the source memory range spans the middle of the address space, resulting in corrupt data being produced by the copy operation. This may disclose information to context-dependent attackers, or result in a denial of service, or, possibly, code execution.
References (6)
Core 6
Core References
Patch x_refsource_misc
https://sourceware.org/git/gitweb.cgi?p=glibc.git%3Bh=cd66c0e584c6d692bc8347b5e72723d02b8a8ada
Third Party Advisory x_refsource_misc
https://github.com/fingolfin/memmove-bug
Issue Tracking x_refsource_misc
https://sourceware.org/bugzilla/show_bug.cgi?id=22644
Vendor Advisory x_refsource_confirm
https://security.netapp.com/advisory/ntap-20190329-0001/
Vendor Advisory x_refsource_confirm
https://security.netapp.com/advisory/ntap-20190401-0001/
Vendor Advisory vendor-advisory
x_refsource_ubuntu
https://usn.ubuntu.com/4416-1/
Scores
CVSS v3
9.8
EPSS
0.0111
EPSS Percentile
78.4%
Attack Vector
NETWORK
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Details
CWE
CWE-119
Status
published
Products (1)
gnu/glibc
2.21 - 2.27
Published
May 18, 2018
Tracked Since
Feb 18, 2026