CVE-2018-8778
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,…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (7.53%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.0
- 7.5 HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- EPSS
- 7.53% probability · 94th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-134
- Affected
- ruby-lang/ruby · canonical/ubuntu linux · debian/debian linux · redhat/enterprise linux
- Source
- cve@mitre.org
References
- http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00036.html
- http://www.securityfocus.com/bid/103693Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1042004Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2018:3729Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:3730Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:3731Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:2028
- https://lists.debian.org/debian-lts-announce/2018/04/msg00023.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/04/msg00024.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/07/msg00012.htmlMailing List, Third Party Advisory
- https://usn.ubuntu.com/3626-1/Third Party Advisory
- https://www.debian.org/security/2018/dsa-4259Third Party Advisory
- https://www.ruby-lang.org/en/news/2018/03/28/buffer-under-read-unpack-cve-2018-8778/Vendor Advisory
- https://www.ruby-lang.org/en/news/2018/03/28/ruby-2-2-10-released/Patch, Vendor Advisory
- https://www.ruby-lang.org/en/news/2018/03/28/ruby-2-3-7-released/Patch, Vendor Advisory
- https://www.ruby-lang.org/en/news/2018/03/28/ruby-2-4-4-released/Patch, Vendor Advisory
- https://www.ruby-lang.org/en/news/2018/03/28/ruby-2-5-1-released/Patch, Vendor Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00036.html
- http://www.securityfocus.com/bid/103693Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1042004Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2018:3729Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:3730Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:3731Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:2028
- https://lists.debian.org/debian-lts-announce/2018/04/msg00023.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/04/msg00024.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/07/msg00012.htmlMailing List, Third Party Advisory
- https://usn.ubuntu.com/3626-1/Third Party Advisory
- https://www.debian.org/security/2018/dsa-4259Third Party Advisory
- https://www.ruby-lang.org/en/news/2018/03/28/buffer-under-read-unpack-cve-2018-8778/Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.