High severity · published Feb 9, 2023
CVE-2023-22796
A regular expression based DoS vulnerability in Active Support <6.1.7.1 and <7.0.4.1
7.5
CVSS
1.7%
EPSS
No
On KEV
Description
A regular expression based DoS vulnerability in Active Support <6.1.7.1 and <7.0.4.1. A specially crafted string passed to the underscore method can cause the regular expression engine to enter a state of catastrophic backtracking. This can cause the process to use large amounts of CPU and memory, leading to a possible DoS vulnerability.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.7% · higher than 77% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
HT
https://github.com/rails/rails ·
6.1.7.1, 7.0.4.1 · source: vendor
AC
Activesupport · Activesupport Project
before 6.1.7.1; 7.0.0 before 7.0.4.1 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-22796
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-22796
Patch
https://discuss.rubyonrails.org/t/cve-2023-22796-possible-redos-based-dos-vulnerability-in-active-supports-underscore/82116
security.netapp.com
https://security.netapp.com/advisory/ntap-20240202-0009/
www.debian.org
https://www.debian.org/security/2023/dsa-5372
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