vulnwire
7.5high

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 unpackin…

Published 8 y ago · modified 4 mo ago · JSON

CVSS
7.5
v3.0 · NVD
CISA KEV
No
not known exploited
EPSS
7.5%
percentile 95%
Public exploits
0
none known

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.

Exploit prediction (EPSS)

7.53% probability of exploitation in the next 30 days, higher than 95% of all scored CVEs.

CVSS scores

Assigned byVersionScoreVector
NVD3.07.5CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
NVD2.05.0AV:N/AC:L/Au:N/C:P/I:N/A:N

Classification

Weakness
  • CWE-134 Use of Externally-Controlled Format String

References

  • ruby-lang.org /en/news/2018/03/28/ruby-2-5-1-released/ · x_refsource_CONFIRM, x_transferred
  • access.redhat.com /errata/RHSA-2018:3729 · vendor-advisory, x_refsource_REDHAT, x_transferred
  • usn.ubuntu.com /3626-1/ · vendor-advisory, x_refsource_UBUNTU, x_transferred
  • securitytracker.com /id/1042004 · vdb-entry, x_refsource_SECTRACK, x_transferred
  • access.redhat.com /errata/RHSA-2018:3730 · vendor-advisory, x_refsource_REDHAT, x_transferred
  • lists.debian.org /debian-lts-announce/2018/04/msg00023.html · mailing-list, x_refsource_MLIST, x_transferred
  • access.redhat.com /errata/RHSA-2018:3731 · vendor-advisory, x_refsource_REDHAT, x_transferred
  • ruby-lang.org /en/news/2018/03/28/ruby-2-3-7-released/ · x_refsource_CONFIRM, x_transferred
  • ruby-lang.org /en/news/2018/03/28/buffer-under-read-unpack-cve-2018-8778/ · x_refsource_CONFIRM, x_transferred
  • lists.debian.org /debian-lts-announce/2018/07/msg00012.html · mailing-list, x_refsource_MLIST, x_transferred
  • ruby-lang.org /en/news/2018/03/28/ruby-2-4-4-released/ · x_refsource_CONFIRM, x_transferred
  • debian.org /security/2018/dsa-4259 · vendor-advisory, x_refsource_DEBIAN, x_transferred
  • ruby-lang.org /en/news/2018/03/28/ruby-2-2-10-released/ · x_refsource_CONFIRM, x_transferred
  • lists.debian.org /debian-lts-announce/2018/04/msg00024.html · mailing-list, x_refsource_MLIST, x_transferred
  • securityfocus.com /bid/103693 · vdb-entry, x_refsource_BID, x_transferred
  • lists.opensuse.org /opensuse-security-announce/2019-07/msg00036.html · vendor-advisory, x_refsource_SUSE, x_transferred
  • access.redhat.com /errata/RHSA-2019:2028 · vendor-advisory, x_refsource_REDHAT, x_transferred

Sources

vulnwire keeps one entry per vulnerability: the CVE id wins, then GHSA; records that alias each other are merged. Machine-readable: JSON.