CVE-2017-18269 Memory corruption in n/a
A flaw in glibc's SSE2 memmove implementation causes data corruption, potentially leading to information disclosure, denial of service, or code execution.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2017-18269?
CVE-2017-18269 is a critical memory corruption vulnerability in Gnu Glibc, published on 18 May 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-119
Which versions are affected by CVE-2017-18269?
It affects 1 product.
Products include Gnu Glibc.
How do I fix CVE-2017-18269?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2017-18269 being exploited?
There is no known exploitation of CVE-2017-18269 in the wild and no public exploit code.
Other vulnerabilities in Gnu Glibc
Sources
Also known as DEBIAN-CVE-2017-18269, GHSA-r6cp-c5hh-vmv8, UBUNTU-CVE-2017-18269.