Traffic Server Apache Traffic Server

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By the Year

In 2022 there have been 8 vulnerabilities in Apache Traffic Server with an average score of 7.6 out of ten. Last year Traffic Server had 14 security vulnerabilities published. Right now, Traffic Server is on track to have less security vulnerabilities in 2022 than it did last year. Last year, the average CVE base score was greater by 0.30

Year Vulnerabilities Average Score
2022 8 7.58
2021 14 7.87
2020 5 8.88
2019 10 7.40
2018 5 6.42

It may take a day or so for new Traffic Server 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 Apache Traffic Server Security Vulnerabilities

Improper Input Validation vulnerability in header parsing of Apache Traffic Server allows an attacker to request secure resources

CVE-2021-37150 7.5 - High - August 10, 2022

Improper Input Validation vulnerability in header parsing of Apache Traffic Server allows an attacker to request secure resources. This issue affects Apache Traffic Server 8.0.0 to 9.1.2.

Improper Input Validation

Improper Input Validation vulnerability in HTTP/2 request validation of Apache Traffic Server

CVE-2022-25763 7.5 - High - August 10, 2022

Improper Input Validation vulnerability in HTTP/2 request validation of Apache Traffic Server allows an attacker to create smuggle or cache poison attacks. This issue affects Apache Traffic Server 8.0.0 to 9.1.2.

Improper Input Validation

Improper Input Validation vulnerability in HTTP/1.1 header parsing of Apache Traffic Server allows an attacker to send invalid headers

CVE-2022-28129 7.5 - High - August 10, 2022

Improper Input Validation vulnerability in HTTP/1.1 header parsing of Apache Traffic Server allows an attacker to send invalid headers. This issue affects Apache Traffic Server 8.0.0 to 9.1.2.

Improper Input Validation

Improper Input Validation vulnerability in handling the Transfer-Encoding header of Apache Traffic Server

CVE-2022-31778 7.5 - High - August 10, 2022

Improper Input Validation vulnerability in handling the Transfer-Encoding header of Apache Traffic Server allows an attacker to poison the cache. This issue affects Apache Traffic Server 8.0.0 to 9.0.2.

Improper Input Validation

Improper Input Validation vulnerability in HTTP/2 header parsing of Apache Traffic Server allows an attacker to smuggle requests

CVE-2022-31779 7.5 - High - August 10, 2022

Improper Input Validation vulnerability in HTTP/2 header parsing of Apache Traffic Server allows an attacker to smuggle requests. This issue affects Apache Traffic Server 8.0.0 to 9.1.2.

Improper Input Validation

Improper Input Validation vulnerability in HTTP/2 frame handling of Apache Traffic Server allows an attacker to smuggle requests

CVE-2022-31780 7.5 - High - August 10, 2022

Improper Input Validation vulnerability in HTTP/2 frame handling of Apache Traffic Server allows an attacker to smuggle requests. This issue affects Apache Traffic Server 8.0.0 to 9.1.2.

Improper Input Validation

Improper Input Validation vulnerability in request line parsing of Apache Traffic Server allows an attacker to send invalid requests

CVE-2021-44040 7.5 - High - March 23, 2022

Improper Input Validation vulnerability in request line parsing of Apache Traffic Server allows an attacker to send invalid requests. This issue affects Apache Traffic Server 8.0.0 to 8.1.3 and 9.0.0 to 9.1.1.

Improper Input Validation

Improper Authentication vulnerability in TLS origin validation of Apache Traffic Server

CVE-2021-44759 8.1 - High - March 23, 2022

Improper Authentication vulnerability in TLS origin validation of Apache Traffic Server allows an attacker to create a man in the middle attack. This issue affects Apache Traffic Server 8.0.0 to 8.1.0.

authentification

Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') vulnerability in the stats-over-http plugin of Apache Traffic Server

CVE-2021-43082 9.8 - Critical - November 03, 2021

Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') vulnerability in the stats-over-http plugin of Apache Traffic Server allows an attacker to overwrite memory. This issue affects Apache Traffic Server 9.1.0.

Classic Buffer Overflow

Improper Authentication vulnerability in TLS origin verification of Apache Traffic Server allows for man in the middle attacks

CVE-2021-38161 8.1 - High - November 03, 2021

Improper Authentication vulnerability in TLS origin verification of Apache Traffic Server allows for man in the middle attacks. This issue affects Apache Traffic Server 8.0.0 to 8.0.8.

authentification

Improper Input Validation vulnerability in header parsing of Apache Traffic Server allows an attacker to smuggle requests

CVE-2021-37149 7.5 - High - November 03, 2021

Improper Input Validation vulnerability in header parsing of Apache Traffic Server allows an attacker to smuggle requests. This issue affects Apache Traffic Server 8.0.0 to 8.1.2 and 9.0.0 to 9.1.0.

Improper Input Validation

Improper input validation vulnerability in header parsing of Apache Traffic Server allows an attacker to smuggle requests

CVE-2021-37148 7.5 - High - November 03, 2021

Improper input validation vulnerability in header parsing of Apache Traffic Server allows an attacker to smuggle requests. This issue affects Apache Traffic Server 8.0.0 to 8.1.2 and 9.0.0 to 9.0.1.

Improper Input Validation

Improper input validation vulnerability in header parsing of Apache Traffic Server allows an attacker to smuggle requests

CVE-2021-37147 7.5 - High - November 03, 2021

Improper input validation vulnerability in header parsing of Apache Traffic Server allows an attacker to smuggle requests. This issue affects Apache Traffic Server 8.0.0 to 8.1.2 and 9.0.0 to 9.1.0.

Improper Input Validation

Improper Input Validation vulnerability in accepting socket connections in Apache Traffic Server

CVE-2021-41585 7.5 - High - November 03, 2021

Improper Input Validation vulnerability in accepting socket connections in Apache Traffic Server allows an attacker to make the server stop accepting new connections. This issue affects Apache Traffic Server 5.0.0 to 9.1.0.

Improper Input Validation

Stack-based Buffer Overflow vulnerability in cachekey plugin of Apache Traffic Server

CVE-2021-35474 9.8 - Critical - June 30, 2021

Stack-based Buffer Overflow vulnerability in cachekey plugin of Apache Traffic Server. This issue affects Apache Traffic Server 7.0.0 to 7.1.12, 8.0.0 to 8.1.1, 9.0.0 to 9.0.1.

Memory Corruption

Improper Input Validation vulnerability in HTTP/2 of Apache Traffic Server allows an attacker to DOS the server

CVE-2021-32566 7.5 - High - June 30, 2021

Improper Input Validation vulnerability in HTTP/2 of Apache Traffic Server allows an attacker to DOS the server. This issue affects Apache Traffic Server 7.0.0 to 7.1.12, 8.0.0 to 8.1.1, 9.0.0 to 9.0.1.

Improper Input Validation

Improper Input Validation vulnerability in HTTP/2 of Apache Traffic Server allows an attacker to DOS the server

CVE-2021-32567 7.5 - High - June 30, 2021

Improper Input Validation vulnerability in HTTP/2 of Apache Traffic Server allows an attacker to DOS the server. This issue affects Apache Traffic Server 7.0.0 to 7.1.12, 8.0.0 to 8.1.1, 9.0.0 to 9.0.1.

Improper Input Validation

Invalid values in the Content-Length header sent to Apache Traffic Server allows an attacker to smuggle requests

CVE-2021-32565 7.5 - High - June 29, 2021

Invalid values in the Content-Length header sent to Apache Traffic Server allows an attacker to smuggle requests. This issue affects Apache Traffic Server 7.0.0 to 7.1.12, 8.0.0 to 8.1.1, 9.0.0 to 9.0.1.

HTTP Request Smuggling

Incorrect handling of url fragment vulnerability of Apache Traffic Server allows an attacker to poison the cache

CVE-2021-27577 7.5 - High - June 29, 2021

Incorrect handling of url fragment vulnerability of Apache Traffic Server allows an attacker to poison the cache. This issue affects Apache Traffic Server 7.0.0 to 7.1.12, 8.0.0 to 8.1.1, 9.0.0 to 9.0.1.

HTTP Request Smuggling

Apache Traffic Server 9.0.0 is vulnerable to a remote DOS attack on the experimental Slicer plugin.

CVE-2021-27737 7.5 - High - May 14, 2021

Apache Traffic Server 9.0.0 is vulnerable to a remote DOS attack on the experimental Slicer plugin.

ATS negative cache option is vulnerable to a cache poisoning attack

CVE-2020-17509 7.5 - High - January 11, 2021

ATS negative cache option is vulnerable to a cache poisoning attack. If you have this option enabled, please upgrade or disable this feature. Apache Traffic Server versions 7.0.0 to 7.1.11 and 8.0.0 to 8.1.0 are affected.

HTTP Request Smuggling

The ATS ESI plugin has a memory disclosure vulnerability

CVE-2020-17508 7.5 - High - January 11, 2021

The ATS ESI plugin has a memory disclosure vulnerability. If you are running the plugin please upgrade. Apache Traffic Server versions 7.0.0 to 7.1.11 and 8.0.0 to 8.1.0 are affected.

Information Disclosure

Apache Traffic Server 6.0.0 to 6.2.3, 7.0.0 to 7.1.10, and 8.0.0 to 8.0.7 is vulnerable to certain types of HTTP/2 HEADERS frames

CVE-2020-9494 7.5 - High - June 24, 2020

Apache Traffic Server 6.0.0 to 6.2.3, 7.0.0 to 7.1.10, and 8.0.0 to 8.0.7 is vulnerable to certain types of HTTP/2 HEADERS frames that can cause the server to allocate a large amount of memory and spin the thread.

Buffer Overflow

Apache ATS 6.0.0 to 6.2.3

CVE-2020-9481 7.5 - High - April 27, 2020

Apache ATS 6.0.0 to 6.2.3, 7.0.0 to 7.1.9, and 8.0.0 to 8.0.6 is vulnerable to a HTTP/2 slow read attack.

Resource Exhaustion

There is a vulnerability in Apache Traffic Server 6.0.0 to 6.2.3

CVE-2019-17565 9.8 - Critical - March 23, 2020

There is a vulnerability in Apache Traffic Server 6.0.0 to 6.2.3, 7.0.0 to 7.1.8, and 8.0.0 to 8.0.5 with a smuggling attack and chunked encoding. Upgrade to versions 7.1.9 and 8.0.6 or later versions.

HTTP Request Smuggling

There is a vulnerability in Apache Traffic Server 6.0.0 to 6.2.3

CVE-2019-17559 9.8 - Critical - March 23, 2020

There is a vulnerability in Apache Traffic Server 6.0.0 to 6.2.3, 7.0.0 to 7.1.8, and 8.0.0 to 8.0.5 with a smuggling attack and scheme parsing. Upgrade to versions 7.1.9 and 8.0.6 or later versions.

HTTP Request Smuggling

There is a vulnerability in Apache Traffic Server 6.0.0 to 6.2.3

CVE-2020-1944 9.8 - Critical - March 23, 2020

There is a vulnerability in Apache Traffic Server 6.0.0 to 6.2.3, 7.0.0 to 7.1.8, and 8.0.0 to 8.0.5 with a smuggling attack and Transfer-Encoding and Content length headers. Upgrade to versions 7.1.9 and 8.0.6 or later versions.

HTTP Request Smuggling

Apache Traffic Server is vulnerable to HTTP/2 setting flood attacks

CVE-2019-10079 7.5 - High - October 22, 2019

Apache Traffic Server is vulnerable to HTTP/2 setting flood attacks. Earlier versions of Apache Traffic Server didn't limit the number of setting frames sent from the client using the HTTP/2 protocol. Users should upgrade to Apache Traffic Server 7.1.7, 8.0.4, or later versions.

Allocation of Resources Without Limits or Throttling

Some HTTP/2 implementations are vulnerable to unconstrained interal data buffering, potentially leading to a denial of service

CVE-2019-9517 7.5 - High - August 13, 2019

Some HTTP/2 implementations are vulnerable to unconstrained interal data buffering, potentially leading to a denial of service. The attacker opens the HTTP/2 window so the peer can send without constraint; however, they leave the TCP window closed so the peer cannot actually write (many of) the bytes on the wire. The attacker then sends a stream of requests for a large response object. Depending on how the servers queue the responses, this can consume excess memory, CPU, or both.

Allocation of Resources Without Limits or Throttling

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 ping floods, potentially leading to a denial of service

CVE-2019-9512 7.5 - High - August 13, 2019

Some HTTP/2 implementations are vulnerable to ping floods, potentially leading to a denial of service. The attacker sends continual pings to an HTTP/2 peer, causing the peer to build an internal queue of responses. Depending on how efficiently this data is queued, this can consume excess CPU, memory, or both.

Resource Exhaustion

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 reset flood, potentially leading to a denial of service

CVE-2019-9514 7.5 - High - August 13, 2019

Some HTTP/2 implementations are vulnerable to a reset flood, potentially leading to a denial of service. The attacker opens a number of streams and sends an invalid request over each stream that should solicit a stream of RST_STREAM frames from the peer. Depending on how the peer queues the RST_STREAM frames, this can consume excess memory, CPU, or both.

Allocation of Resources Without Limits or Throttling

Some HTTP/2 implementations are vulnerable to a settings flood, potentially leading to a denial of service

CVE-2019-9515 7.5 - High - August 13, 2019

Some HTTP/2 implementations are vulnerable to a settings flood, potentially leading to a denial of service. The attacker sends a stream of SETTINGS frames to the peer. Since the RFC requires that the peer reply with one acknowledgement per SETTINGS frame, an empty SETTINGS frame is almost equivalent in behavior to a ping. 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 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

Some HTTP/2 implementations are vulnerable to a flood of empty frames, potentially leading to a denial of service

CVE-2019-9518 7.5 - High - August 13, 2019

Some HTTP/2 implementations are vulnerable to a flood of empty frames, potentially leading to a denial of service. The attacker sends a stream of frames with an empty payload and without the end-of-stream flag. These frames can be DATA, HEADERS, CONTINUATION and/or PUSH_PROMISE. The peer spends time processing each frame disproportionate to attack bandwidth. This can consume excess CPU.

Allocation of Resources Without Limits or Throttling

sslheaders plugin extracts information from the client certificate and sets headers in the request based on the configuration of the plugin

CVE-2018-11783 7.5 - High - March 07, 2019

sslheaders plugin extracts information from the client certificate and sets headers in the request based on the configuration of the plugin. The plugin doesn't strip the headers from the request in some scenarios. This problem was discovered in versions 6.0.0 to 6.0.3, 7.0.0 to 7.1.5, and 8.0.0 to 8.0.1.

Information Disclosure

Adding method ACLs in remap.config can cause a segfault when the user makes a carefully crafted request

CVE-2018-1318 7.5 - High - August 29, 2018

Adding method ACLs in remap.config can cause a segfault when the user makes a carefully crafted request. This affects versions Apache Traffic Server (ATS) 6.0.0 to 6.2.2 and 7.0.0 to 7.1.3. To resolve this issue users running 6.x should upgrade to 6.2.3 or later versions and 7.x users should upgrade to 7.1.4 or later versions.

Improper Input Validation

Pages that are rendered using the ESI plugin can have access to the cookie header when the plugin is configured not to allow access

CVE-2018-8040 5.3 - Medium - August 29, 2018

Pages that are rendered using the ESI plugin can have access to the cookie header when the plugin is configured not to allow access. This affects Apache Traffic Server (ATS) versions 6.0.0 to 6.2.2 and 7.0.0 to 7.1.3. To resolve this issue users running 6.x should upgrade to 6.2.3 or later versions and 7.x users should upgrade to 7.1.4 or later versions.

Exposure of Resource to Wrong Sphere

A carefully crafted invalid TLS handshake can cause Apache Traffic Server (ATS) to segfault

CVE-2018-8022 7.5 - High - August 29, 2018

A carefully crafted invalid TLS handshake can cause Apache Traffic Server (ATS) to segfault. This affects version 6.2.2. To resolve this issue users running 6.2.2 should upgrade to 6.2.3 or later versions.

Improper Input Validation

When there are multiple ranges in a range request, Apache Traffic Server (ATS) will read the entire object from cache

CVE-2018-8005 5.3 - Medium - August 29, 2018

When there are multiple ranges in a range request, Apache Traffic Server (ATS) will read the entire object from cache. This can cause performance problems with large objects in cache. This affects versions 6.0.0 to 6.2.2 and 7.0.0 to 7.1.3. To resolve this issue users running 6.x users should upgrade to 6.2.3 or later versions and 7.x users should upgrade to 7.1.4 or later versions.

Resource Exhaustion

There are multiple HTTP smuggling and cache poisoning issues when clients making malicious requests interact with Apache Traffic Server (ATS)

CVE-2018-8004 6.5 - Medium - August 29, 2018

There are multiple HTTP smuggling and cache poisoning issues when clients making malicious requests interact with Apache Traffic Server (ATS). This affects versions 6.0.0 to 6.2.2 and 7.0.0 to 7.1.3. To resolve this issue users running 6.x should upgrade to 6.2.3 or later versions and 7.x users should upgrade to 7.1.4 or later versions.

HTTP Request Smuggling

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