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CVE-2017-18269

9.8 · CRITICAL

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 o…

Published May 18, 2018CWE-119EPSS 4.63%

Overview

CVE-2017-18269 is a critical-severity vulnerability. It was published on May 18, 2018 and has a CVSS 3.0 base score of 9.8 (CRITICAL).

This vulnerability has a CVSS 3.0 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/fingolfin/memmove-bugRefsecurity.netapp.com/advisory/ntap-20190329-0001/Refsecurity.netapp.com/advisory/ntap-20190401-0001/Refsourceware.org/bugzilla/show_bug.cgi?id=22644Refsourceware.org/git/gitweb.cgi?p=glibc.git%3Bh=cd66c0e584c6d692bc8347b5e72723d02b8a8adaRefusn.ubuntu.com/4416-1/GitHubgithub.com/fingolfin/memmove-bugRefsecurity.netapp.com/advisory/ntap-20190329-0001/Refsecurity.netapp.com/advisory/ntap-20190401-0001/Refsourceware.org/bugzilla/show_bug.cgi?id=22644

How CyberStrike helps

Frequently asked questions

What is CVE-2017-18269?

CVE-2017-18269 is a critical-severity vulnerability. It was published on May 18, 2018 and has a CVSS 3.0 base score of 9.8 (CRITICAL).

How severe is CVE-2017-18269?

This vulnerability has a CVSS 3.0 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2017-18269?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2017-18269?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2017-18269 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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