High severity7.5NVD Advisory· Published Apr 3, 2018· Updated Jun 17, 2026
CVE-2018-8778
CVE-2018-8778
Description
In Ruby before 2.2.10, 2.3.x before 2.3.7, 2.4.x before 2.4.4, 2.5.x before 2.5.1, and 2.6.0-preview1, an attacker controlling the unpacking format (similar to format string vulnerabilities) can trigger a buffer under-read in the String#unpack method, resulting in a massive and controlled information disclosure.
AI Insight
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Affected products
28- osv-coords27 versionspkg:rpm/opensuse/ruby2.5&distro=openSUSE%20Leap%2015.0pkg:rpm/opensuse/ruby2.5&distro=openSUSE%20Leap%2015.1pkg:rpm/opensuse/ruby-bundled-gems-rpmhelper&distro=openSUSE%20Leap%2015.0pkg:rpm/opensuse/ruby-bundled-gems-rpmhelper&distro=openSUSE%20Leap%2015.1pkg:rpm/suse/ruby2.1&distro=HPE%20Helion%20OpenStack%208pkg:rpm/suse/ruby2.1&distro=SUSE%20Enterprise%20Storage%205pkg:rpm/suse/ruby2.1&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP2-BCLpkg:rpm/suse/ruby2.1&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP2-LTSSpkg:rpm/suse/ruby2.1&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP3-BCLpkg:rpm/suse/ruby2.1&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP3-LTSSpkg:rpm/suse/ruby2.1&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP4pkg:rpm/suse/ruby2.1&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5pkg:rpm/suse/ruby2.1&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP2pkg:rpm/suse/ruby2.1&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP3pkg:rpm/suse/ruby2.1&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP4pkg:rpm/suse/ruby2.1&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5pkg:rpm/suse/ruby2.1&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2012%20SP4pkg:rpm/suse/ruby2.1&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2012%20SP5pkg:rpm/suse/ruby2.1&distro=SUSE%20OpenStack%20Cloud%207pkg:rpm/suse/ruby2.1&distro=SUSE%20OpenStack%20Cloud%208pkg:rpm/suse/ruby2.1&distro=SUSE%20OpenStack%20Cloud%20Crowbar%208pkg:rpm/suse/ruby2.5&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015pkg:rpm/suse/ruby2.5&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP1pkg:rpm/suse/yast2-ruby-bindings&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP2-BCLpkg:rpm/suse/yast2-ruby-bindings&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP2-LTSSpkg:rpm/suse/yast2-ruby-bindings&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP2pkg:rpm/suse/yast2-ruby-bindings&distro=SUSE%20OpenStack%20Cloud%207
< 2.5.5-lp151.4.3.1+ 26 more
- (no CPE)range: < 2.5.5-lp151.4.3.1
- (no CPE)range: < 2.5.5-lp151.4.3.1
- (no CPE)range: < 0.0.2-lp151.2.1
- (no CPE)range: < 0.0.2-lp151.2.1
- (no CPE)range: < 2.1.9-19.3.2
- (no CPE)range: < 2.1.9-19.3.2
- (no CPE)range: < 2.1.9-19.3.2
- (no CPE)range: < 2.1.9-19.3.2
- (no CPE)range: < 2.1.9-19.3.2
- (no CPE)range: < 2.1.9-19.3.2
- (no CPE)range: < 2.1.9-19.3.2
- (no CPE)range: < 2.1.9-19.3.2
- (no CPE)range: < 2.1.9-19.3.2
- (no CPE)range: < 2.1.9-19.3.2
- (no CPE)range: < 2.1.9-19.3.2
- (no CPE)range: < 2.1.9-19.3.2
- (no CPE)range: < 2.1.9-19.3.2
- (no CPE)range: < 2.1.9-19.3.2
- (no CPE)range: < 2.1.9-19.3.2
- (no CPE)range: < 2.1.9-19.3.2
- (no CPE)range: < 2.1.9-19.3.2
- (no CPE)range: < 2.5.5-4.3.1
- (no CPE)range: < 2.5.5-4.3.1
- (no CPE)range: < 3.1.53-9.8.1
- (no CPE)range: < 3.1.53-9.8.1
- (no CPE)range: < 3.1.53-9.8.1
- (no CPE)range: < 3.1.53-9.8.1
Patches
Vulnerability mechanics
References
17- www.ruby-lang.org/en/news/2018/03/28/ruby-2-2-10-released/nvdPatchVendor Advisory
- www.ruby-lang.org/en/news/2018/03/28/ruby-2-3-7-released/nvdPatchVendor Advisory
- www.ruby-lang.org/en/news/2018/03/28/ruby-2-4-4-released/nvdPatchVendor Advisory
- www.ruby-lang.org/en/news/2018/03/28/ruby-2-5-1-released/nvdPatchVendor Advisory
- www.securityfocus.com/bid/103693nvdThird Party AdvisoryVDB Entry
- www.securitytracker.com/id/1042004nvdThird Party AdvisoryVDB Entry
- access.redhat.com/errata/RHSA-2018:3729nvdThird Party Advisory
- access.redhat.com/errata/RHSA-2018:3730nvdThird Party Advisory
- access.redhat.com/errata/RHSA-2018:3731nvdThird Party Advisory
- lists.debian.org/debian-lts-announce/2018/04/msg00023.htmlnvdMailing ListThird Party Advisory
- lists.debian.org/debian-lts-announce/2018/04/msg00024.htmlnvdMailing ListThird Party Advisory
- lists.debian.org/debian-lts-announce/2018/07/msg00012.htmlnvdMailing ListThird Party Advisory
- usn.ubuntu.com/3626-1/nvdThird Party Advisory
- www.debian.org/security/2018/dsa-4259nvdThird Party Advisory
- www.ruby-lang.org/en/news/2018/03/28/buffer-under-read-unpack-cve-2018-8778/nvdVendor Advisory
- lists.opensuse.org/opensuse-security-announce/2019-07/msg00036.htmlnvd
- access.redhat.com/errata/RHSA-2019:2028nvd
News mentions
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