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Recent F5 Networks Nginx Security Advisories

Advisory Title Published
K67397230 K67397230: BIG-IP ASM, F5 Advanced WAF, and NGINX App Protect normalizing security exposure May 4, 2022
K11455641 K11455641: NGINX LDAP Reference Implementation security exposure April 13, 2022
K30911244 K30911244: Advanced WAF, BIG-IP ASM, and NGINX App Protect attack signature check failure February 15, 2022
K41503304 K41503304: Advanced WAF, BIG-IP ASM, and NGINX App Protect attack signature bypass security exposure January 19, 2022
K57735782 K57735782: NGINX Controller API Management vulnerability CVE-2020-23008 January 19, 2022
K73710094 K73710094: XSS vulnerability in undisclosed page of the NGINX Swagger UI December 14, 2021
K50839343 K50839343: NGINX ModSecurity WAF vulnerability CVE-2021-42717 December 3, 2021
K01051452 NGINX Ingress Controller vulnerability CVE-2021-23055 November 10, 2021
K30341203 BIG-IP LTM and NGINX are not exposed to certain desync attacks August 5, 2021
K52559937 Overview of NGINX vulnerabilities (May 2021) May 25, 2021

By the Year

In 2022 there have been 1 vulnerability in F5 Networks Nginx with an average score of 7.4 out of ten. Last year Nginx had 2 security vulnerabilities published. At the current rates, it appears that the number of vulnerabilities last year and this year may equal out. Last year, the average CVE base score was greater by 2.20

Year Vulnerabilities Average Score
2022 1 7.40
2021 2 9.60
2020 1 5.30
2019 4 6.58
2018 3 7.03

It may take a day or so for new Nginx vulnerabilities to show up in the stats or in the list of recent security vulnerabilties. Additionally vulnerabilities may be tagged under a different product or component name.

Recent F5 Networks Nginx Security Vulnerabilities

ALPACA is an application layer protocol content confusion attack

CVE-2021-3618 7.4 - High - March 23, 2022

ALPACA is an application layer protocol content confusion attack, exploiting TLS servers implementing different protocols but using compatible certificates, such as multi-domain or wildcard certificates. A MiTM attacker having access to victim's traffic at the TCP/IP layer can redirect traffic from one subdomain to another, resulting in a valid TLS session. This breaks the authentication of TLS and cross-protocol attacks may be possible where the behavior of one protocol service may compromise the other at the application layer.

Improper Certificate Validation

NGINX before 1.13.6 has a buffer overflow for years

CVE-2017-20005 9.8 - Critical - June 06, 2021

NGINX before 1.13.6 has a buffer overflow for years that exceed four digits, as demonstrated by a file with a modification date in 1969 that causes an integer overflow (or a false modification date far in the future), when encountered by the autoindex module.

Integer Overflow or Wraparound

A security issue in nginx resolver was identified, which might

CVE-2021-23017 9.4 - Critical - June 01, 2021

A security issue in nginx resolver was identified, which might allow an attacker who is able to forge UDP packets from the DNS server to cause 1-byte memory overwrite, resulting in worker process crash or potential other impact.

off-by-five

NGINX before 1.17.7, with certain error_page configurations

CVE-2019-20372 5.3 - Medium - January 09, 2020

NGINX before 1.17.7, with certain error_page configurations, allows HTTP request smuggling, as demonstrated by the ability of an attacker to read unauthorized web pages in environments where NGINX is being fronted by a load balancer.

HTTP Request Smuggling

nginx http proxy module does not verify peer identity of https origin server

CVE-2011-4968 4.8 - Medium - November 19, 2019

nginx http proxy module does not verify peer identity of https origin server which could facilitate man-in-the-middle attack (MITM)

Improper Input Validation

Some HTTP/2 implementations are vulnerable to window size manipulation and stream prioritization manipulation

CVE-2019-9511 7.5 - High - August 13, 2019

Some HTTP/2 implementations are vulnerable to window size manipulation and stream prioritization manipulation, potentially leading to a denial of service. The attacker requests a large amount of data from a specified resource over multiple streams. They manipulate window size and stream priority to force the server to queue the data in 1-byte chunks. Depending on how efficiently this data is queued, this can consume excess CPU, memory, or both.

Allocation of Resources Without Limits or Throttling

Some HTTP/2 implementations are vulnerable to resource loops, potentially leading to a denial of service

CVE-2019-9513 7.5 - High - August 13, 2019

Some HTTP/2 implementations are vulnerable to resource loops, potentially leading to a denial of service. The attacker creates multiple request streams and continually shuffles the priority of the streams in a way that causes substantial churn to the priority tree. This can consume excess CPU.

Some HTTP/2 implementations are vulnerable to a header leak, potentially leading to a denial of service

CVE-2019-9516 6.5 - Medium - August 13, 2019

Some HTTP/2 implementations are vulnerable to a header leak, potentially leading to a denial of service. The attacker sends a stream of headers with a 0-length header name and 0-length header value, optionally Huffman encoded into 1-byte or greater headers. Some implementations allocate memory for these headers and keep the allocation alive until the session dies. This can consume excess memory.

Allocation of Resources Without Limits or Throttling

nginx before versions 1.15.6, 1.14.1 has a vulnerability in the ngx_http_mp4_module, which might

CVE-2018-16845 6.1 - Medium - November 07, 2018

nginx before versions 1.15.6, 1.14.1 has a vulnerability in the ngx_http_mp4_module, which might allow an attacker to cause infinite loop in a worker process, cause a worker process crash, or might result in worker process memory disclosure by using a specially crafted mp4 file. The issue only affects nginx if it is built with the ngx_http_mp4_module (the module is not built by default) and the .mp4. directive is used in the configuration file. Further, the attack is only possible if an attacker is able to trigger processing of a specially crafted mp4 file with the ngx_http_mp4_module.

Resource Exhaustion

nginx before versions 1.15.6 and 1.14.1 has a vulnerability in the implementation of HTTP/2 that can allow for excessive CPU usage

CVE-2018-16844 7.5 - High - November 07, 2018

nginx before versions 1.15.6 and 1.14.1 has a vulnerability in the implementation of HTTP/2 that can allow for excessive CPU usage. This issue affects nginx compiled with the ngx_http_v2_module (not compiled by default) if the 'http2' option of the 'listen' directive is used in a configuration file.

Resource Exhaustion

nginx before versions 1.15.6 and 1.14.1 has a vulnerability in the implementation of HTTP/2 that can allow for excessive memory consumption

CVE-2018-16843 7.5 - High - November 07, 2018

nginx before versions 1.15.6 and 1.14.1 has a vulnerability in the implementation of HTTP/2 that can allow for excessive memory consumption. This issue affects nginx compiled with the ngx_http_v2_module (not compiled by default) if the 'http2' option of the 'listen' directive is used in a configuration file.

Resource Exhaustion

Nginx versions since 0.5.6 up to and including 1.13.2 are vulnerable to integer overflow vulnerability in nginx range filter module resulting into leak of potentially sensitive information triggered by specially crafted request.

CVE-2017-7529 7.5 - High - July 13, 2017

Nginx versions since 0.5.6 up to and including 1.13.2 are vulnerable to integer overflow vulnerability in nginx range filter module resulting into leak of potentially sensitive information triggered by specially crafted request.

Integer Overflow or Wraparound

os/unix/ngx_files.c in nginx before 1.10.1 and 1.11.x before 1.11.1

CVE-2016-4450 7.5 - High - June 07, 2016

os/unix/ngx_files.c in nginx before 1.10.1 and 1.11.x before 1.11.1 allows remote attackers to cause a denial of service (NULL pointer dereference and worker process crash) via a crafted request, involving writing a client request body to a temporary file.

NULL Pointer Dereference

The resolver in nginx before 1.8.1 and 1.9.x before 1.9.10 does not properly limit CNAME resolution, which

CVE-2016-0747 5.3 - Medium - February 15, 2016

The resolver in nginx before 1.8.1 and 1.9.x before 1.9.10 does not properly limit CNAME resolution, which allows remote attackers to cause a denial of service (worker process resource consumption) via vectors related to arbitrary name resolution.

Resource Exhaustion

Use-after-free vulnerability in the resolver in nginx 0.6.18 through 1.8.0 and 1.9.x before 1.9.10

CVE-2016-0746 9.8 - Critical - February 15, 2016

Use-after-free vulnerability in the resolver in nginx 0.6.18 through 1.8.0 and 1.9.x before 1.9.10 allows remote attackers to cause a denial of service (worker process crash) or possibly have unspecified other impact via a crafted DNS response related to CNAME response processing.

Dangling pointer

The resolver in nginx before 1.8.1 and 1.9.x before 1.9.10

CVE-2016-0742 7.5 - High - February 15, 2016

The resolver in nginx before 1.8.1 and 1.9.x before 1.9.10 allows remote attackers to cause a denial of service (invalid pointer dereference and worker process crash) via a crafted UDP DNS response.

NULL Pointer Dereference

The STARTTLS implementation in mail/ngx_mail_smtp_handler.c in the SMTP proxy in nginx 1.5.x and 1.6.x before 1.6.1 and 1.7.x before 1.7.4 does not properly restrict I/O buffering, which allows man-in-the-middle attackers to insert commands into encrypted SMTP sessions by sending a cleartext command

CVE-2014-3556 - December 29, 2014

The STARTTLS implementation in mail/ngx_mail_smtp_handler.c in the SMTP proxy in nginx 1.5.x and 1.6.x before 1.6.1 and 1.7.x before 1.7.4 does not properly restrict I/O buffering, which allows man-in-the-middle attackers to insert commands into encrypted SMTP sessions by sending a cleartext command that is processed after TLS is in place, related to a "plaintext command injection" attack, a similar issue to CVE-2011-0411.

Command Injection

nginx 0.5.6 through 1.7.4, when using the same shared ssl_session_cache or ssl_session_ticket_key for multiple servers, can reuse a cached SSL session for an unrelated context, which

CVE-2014-3616 - December 08, 2014

nginx 0.5.6 through 1.7.4, when using the same shared ssl_session_cache or ssl_session_ticket_key for multiple servers, can reuse a cached SSL session for an unrelated context, which allows remote attackers with certain privileges to conduct "virtual host confusion" attacks.

Insufficient Session Expiration

The SPDY implementation in the ngx_http_spdy_module module in nginx 1.5.10 before 1.5.11, when running on a 32-bit platform

CVE-2014-0088 - April 29, 2014

The SPDY implementation in the ngx_http_spdy_module module in nginx 1.5.10 before 1.5.11, when running on a 32-bit platform, allows remote attackers to execute arbitrary code via a crafted request.

Buffer Overflow

Heap-based buffer overflow in the SPDY implementation in nginx 1.3.15 before 1.4.7 and 1.5.x before 1.5.12

CVE-2014-0133 - March 28, 2014

Heap-based buffer overflow in the SPDY implementation in nginx 1.3.15 before 1.4.7 and 1.5.x before 1.5.12 allows remote attackers to execute arbitrary code via a crafted request.

Memory Corruption

nginx 0.8.41 through 1.4.3 and 1.5.x before 1.5.7

CVE-2013-4547 - November 23, 2013

nginx 0.8.41 through 1.4.3 and 1.5.x before 1.5.7 allows remote attackers to bypass intended restrictions via an unescaped space character in a URI.

Output Sanitization

The default configuration of nginx, possibly 1.3.13 and earlier, uses world-readable permissions for the (1) access.log and (2) error.log files, which

CVE-2013-0337 - October 27, 2013

The default configuration of nginx, possibly 1.3.13 and earlier, uses world-readable permissions for the (1) access.log and (2) error.log files, which allows local users to obtain sensitive information by reading the files.

Permissions, Privileges, and Access Controls

The ngx_http_parse_chunked function in http/ngx_http_parse.c in nginx 1.3.9 through 1.4.0

CVE-2013-2028 - July 20, 2013

The ngx_http_parse_chunked function in http/ngx_http_parse.c in nginx 1.3.9 through 1.4.0 allows remote attackers to cause a denial of service (crash) and execute arbitrary code via a chunked Transfer-Encoding request with a large chunk size, which triggers an integer signedness error and a stack-based buffer overflow.

Memory Corruption

http/modules/ngx_http_proxy_module.c in nginx 1.1.4 through 1.2.8 and 1.3.0 through 1.4.0, when proxy_pass is used with untrusted HTTP servers

CVE-2013-2070 - July 20, 2013

http/modules/ngx_http_proxy_module.c in nginx 1.1.4 through 1.2.8 and 1.3.0 through 1.4.0, when proxy_pass is used with untrusted HTTP servers, allows remote attackers to cause a denial of service (crash) and obtain sensitive information from worker process memory via a crafted proxy response, a similar vulnerability to CVE-2013-2028.

Buffer overflow in ngx_http_mp4_module.c in the ngx_http_mp4_module module in nginx 1.0.7 through 1.0.14 and 1.1.3 through 1.1.18, when the mp4 directive is used

CVE-2012-2089 - April 17, 2012

Buffer overflow in ngx_http_mp4_module.c in the ngx_http_mp4_module module in nginx 1.0.7 through 1.0.14 and 1.1.3 through 1.1.18, when the mp4 directive is used, allows remote attackers to cause a denial of service (memory overwrite) or possibly execute arbitrary code via a crafted MP4 file.

Classic Buffer Overflow

Use-after-free vulnerability in nginx before 1.0.14 and 1.1.x before 1.1.17

CVE-2012-1180 - April 17, 2012

Use-after-free vulnerability in nginx before 1.0.14 and 1.1.x before 1.1.17 allows remote HTTP servers to obtain sensitive information from process memory via a crafted backend response, in conjunction with a client request.

Dangling pointer

Heap-based buffer overflow in compression-pointer processing in core/ngx_resolver.c in nginx before 1.0.10

CVE-2011-4315 - December 08, 2011

Heap-based buffer overflow in compression-pointer processing in core/ngx_resolver.c in nginx before 1.0.10 allows remote resolvers to cause a denial of service (daemon crash) or possibly have unspecified other impact via a long response.

Memory Corruption

nginx 0.8.36 allows remote attackers to cause a denial of service (crash) via certain encoded directory traversal sequences

CVE-2010-2266 - June 15, 2010

nginx 0.8.36 allows remote attackers to cause a denial of service (crash) via certain encoded directory traversal sequences that trigger memory corruption, as demonstrated using the "%c0.%c0." sequence.

Directory traversal

nginx 0.7.64 writes data to a log file without sanitizing non-printable characters, which might

CVE-2009-4487 - January 13, 2010

nginx 0.7.64 writes data to a log file without sanitizing non-printable characters, which might allow remote attackers to modify a window's title, or possibly execute arbitrary commands or overwrite files, via an HTTP request containing an escape sequence for a terminal emulator.

src/http/ngx_http_parse.c in nginx (aka Engine X) 0.1.0 through 0.4.14, 0.5.x before 0.5.38, 0.6.x before 0.6.39, 0.7.x before 0.7.62, and 0.8.x before 0.8.14

CVE-2009-3896 - November 24, 2009

src/http/ngx_http_parse.c in nginx (aka Engine X) 0.1.0 through 0.4.14, 0.5.x before 0.5.38, 0.6.x before 0.6.39, 0.7.x before 0.7.62, and 0.8.x before 0.8.14 allows remote attackers to cause a denial of service (NULL pointer dereference and worker process crash) via a long URI.

Buffer Overflow

Directory traversal vulnerability in src/http/modules/ngx_http_dav_module.c in nginx (aka Engine X) before 0.7.63, and 0.8.x before 0.8.17

CVE-2009-3898 - November 24, 2009

Directory traversal vulnerability in src/http/modules/ngx_http_dav_module.c in nginx (aka Engine X) before 0.7.63, and 0.8.x before 0.8.17, allows remote authenticated users to create or overwrite arbitrary files via a .. (dot dot) in the Destination HTTP header for the WebDAV (1) COPY or (2) MOVE method.

Directory traversal

Buffer underflow in src/http/ngx_http_parse.c in nginx 0.1.0 through 0.5.37, 0.6.x before 0.6.39, 0.7.x before 0.7.62, and 0.8.x before 0.8.15

CVE-2009-2629 - September 15, 2009

Buffer underflow in src/http/ngx_http_parse.c in nginx 0.1.0 through 0.5.37, 0.6.x before 0.6.39, 0.7.x before 0.7.62, and 0.8.x before 0.8.15 allows remote attackers to execute arbitrary code via crafted HTTP requests.

Memory Corruption

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