Critical severity · published May 20, 2019
CVE-2019-12207
njs through 0.3.1, used in NGINX, has a heap-based buffer over-read in nxt_utf8_decode in nxt/nxt_utf8.c
9.8
CVSS
1.8%
EPSS
No
On KEV
Description
njs through 0.3.1, used in NGINX, has a heap-based buffer over-read in nxt_utf8_decode in nxt/nxt_utf8.c.
CVSS vector
CVSS:3.0/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)1.8% · higher than 79% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
NJ
Njs · F5
through 0.3.1 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-12207
CVE.org
https://www.cve.org/CVERecord?id=CVE-2019-12207
Exploit
https://github.com/nginx/njs/issues/168
More from Njs
9.8
CVE-2026-8711
NGINX JavaScript vulnerability
9.8
CVE-2020-19695
Buffer Overflow found in Nginx NJS allows a remote attacker to execute arbitrary code via the njs_object_property parameter of the njs/njs_vm.c function
9.8
CVE-2020-19692
Buffer Overflow vulnerabilty found in Nginx NJS v.0feca92 allows a remote attacker to execute arbitrary code via the njs_module_read in the njs_module.c file
9.8
CVE-2022-43286
Nginx NJS v0.7.2 was discovered to contain a heap-use-after-free bug caused by illegal memory copy in the function njs_json_parse_iterator_call at njs_json.c
9.8
CVE-2022-29379
Nginx NJS v0.7.3 was discovered to contain a stack overflow in the function njs_default_module_loader at /src/njs/src/njs_module.c