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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…
High7.5EPSS 7.5%
- Published
- Updated
- Reserved
- Assigned by
- mitre
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.0 | High7.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
- EPSS (exploitation in 30 days)
- 7.5% · top 5.5% of all CVEs (4 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.
Weakness
Affected products
n/a
- affected n/a
References (17)
- https://www.ruby-lang.org/en/news/2018/03/28/ruby-2-5-1-released/ (opens in a new tab)x_refsource_CONFIRMx_transferred
- RHSA-2018:3729 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- USN-3626-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- 1042004 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
- RHSA-2018:3730 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- [debian-lts-announce] 20180423 [SECURITY] [DLA 1358-1] ruby1.9.1 security update (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- RHSA-2018:3731 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- https://www.ruby-lang.org/en/news/2018/03/28/ruby-2-3-7-released/ (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://www.ruby-lang.org/en/news/2018/03/28/buffer-under-read-unpack-cve-2018-8778/ (opens in a new tab)x_refsource_CONFIRMx_transferred
- [debian-lts-announce] 20180714 [SECURITY] [DLA 1421-1] ruby2.1 security update (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- https://www.ruby-lang.org/en/news/2018/03/28/ruby-2-4-4-released/ (opens in a new tab)x_refsource_CONFIRMx_transferred
- DSA-4259 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
- https://www.ruby-lang.org/en/news/2018/03/28/ruby-2-2-10-released/ (opens in a new tab)x_refsource_CONFIRMx_transferred
- [debian-lts-announce] 20180423 [SECURITY] [DLA 1359-1] ruby1.8 security update (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- 103693 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- openSUSE-SU-2019:1771 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- RHSA-2019:2028 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
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[](https://trackcve.app/cve/CVE-2018-8778)Record last updated .