SB2024060431 - Multiple vulnerabilities in nginx and NGINX Plus

Description

This security bulletin contains information about 4 vulnerabilities.

1) Stack-based buffer overflow (CVE-ID: CVE-2024-31079)

CWE-ID: CWE-121 - Stack-based buffer overflow

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary error when HTTP/3 requests within the HTTP/3 QUIC module
 (ngx_http_v3_module). A remote attacker can send specially crafted requests to the web server, trigger a stack-based buffer overflow and perform a denial of service (DoS) attack.

This attack requires that a request be specifically timed during the connection draining process, which the attacker has no visibility and limited influence over.

2) Out-of-bounds write (CVE-ID: CVE-2024-32760)

CWE-ID: CWE-787 - Out-of-bounds write

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary error when processing HTTP/3 requests within the HTTP/3 QUIC module (ngx_http_v3_module). A remote attacker can send specially crafted HTTP/3 requests to the web server, trigger an out-of-bounds write and perform a denial of service (DoS) attack.

3) Use-after-free (CVE-ID: CVE-2024-34161)

CWE-ID: CWE-416 - Use After Free

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote attacker to gain access to sensitive information.

The vulnerability exists due to a use-after-free error within the HTTP/3 QUIC module (ngx_http_v3_module). A remote attacker can send specially crafted HTTP/3 requests to the web server and read parts of free memory.

4) NULL pointer dereference (CVE-ID: CVE-2024-35200)

CWE-ID: CWE-476 - NULL Pointer Dereference

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dereference error within the HTTP/3 QUIC module (ngx_http_v3_module). A remote attacker can send specially crafted HTTP/3 requests to the web server and perform a denial of service (DoS) attack.

Remediation

Install update from vendor's website.

References

• https://my.f5.com/manage/s/article/K000139611
• https://mailman.nginx.org/pipermail/nginx-announce/2024/GMY32CSHFH6VFTN76HJNX7WNEX4RLHF6.html
• https://my.f5.com/manage/s/article/K000139609
• https://my.f5.com/manage/s/article/K000139627
• https://my.f5.com/manage/s/article/K000139612