Critical severity · published May 18, 2018
CVE-2017-18269
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…
9.8
CVSS
4.5%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)4.5% · higher than 92% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GL
Glibc · Gnu
2.21 through 2.27 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2017-18269
CVE.org
https://www.cve.org/CVERecord?id=CVE-2017-18269
Third Party Advisory
https://github.com/fingolfin/memmove-bug
security.netapp.com
https://security.netapp.com/advisory/ntap-20190329-0001/
security.netapp.com
https://security.netapp.com/advisory/ntap-20190401-0001/
Issue Tracking
https://sourceware.org/bugzilla/show_bug.cgi?id=22644
sourceware.org
https://sourceware.org/git/gitweb.cgi?p=glibc.git%3Bh=cd66c0e584c6d692bc8347b5e72723d02b8a8ada
usn.ubuntu.com
https://usn.ubuntu.com/4416-1/
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