Description (CNA)
A vulnerability exists in NGINX Plus and NGINX Open Source when a map directive uses regex matching and a string expression references the map's regex capture variables before referencing the map output variable. Alternatively, the same result could be achieved by using a non-cacheable variable in a string expression under certain conditions. An unauthenticated attacker along with conditions beyond their control can exploit this vulnerability by sending crafted HTTP requests. This may cause a heap buffer overflow in the NGINX worker process leading to a restart. Additionally, attackers can execute code on systems with Address Space Layout Randomization (ASLR) disabled or when the attacker can bypass ASLR. Impact: This vulnerability may allow remote attackers to cause a denial-of-service (DoS) on the NGINX system or to possibly trigger a code execution. There is no control plane exposure; this is a data plane issue only. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| F5 / NGINX Plus | affected 37.0.0.1 before 37.0.3.1; affected R36 before R36 P7; affected R33 before * |
| F5 / NGINX Open Source | affected 1.31.2 before 1.31.3; affected 0.9.6 before 1.30.4 |
CWE
CWE-122
References
ADP enrichment
No English description supplied.
No references supplied.