Critical severity · published Feb 14, 2020
CVE-2016-2338
An exploitable heap overflow vulnerability exists in the Psych::Emitter start_document function of Ruby
9.8
CVSS
4.7%
EPSS
No
On KEV
Description
An exploitable heap overflow vulnerability exists in the Psych::Emitter start_document function of Ruby. In Psych::Emitter start_document function heap buffer "head" allocation is made based on tags array length. Specially constructed object passed as element of tags array can increase this array size after mentioned allocation and cause heap overflow.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)4.7% · higher than 92% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DL
Debian Linux · Debian
8.0 · source: NVD
RU
Ruby · Ruby-lang
2.2.2; 2.3.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2016-2338
CVE.org
https://www.cve.org/CVERecord?id=CVE-2016-2338
Exploit
http://www.talosintelligence.com/reports/TALOS-2016-0032/
Mailing List
https://lists.debian.org/debian-lts-announce/2020/03/msg00032.html
Third Party Advisory
https://security.netapp.com/advisory/ntap-20221228-0005/
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