Vulnerabilities (CVE)

Filtered by vendor Haproxy Subscribe
Total 23 CVE
CVE Vendors Products Updated CVSS v2 CVSS v3
CVE-2021-40346 2 Debian, Haproxy 2 Debian Linux, Haproxy 2021-09-17 5.0 MEDIUM 7.5 HIGH
An integer overflow exists in HAProxy 2.0 through 2.5 in htx_add_header that can be exploited to perform an HTTP request smuggling attack, allowing an attacker to bypass all configured http-request HAProxy ACLs and possibly other ACLs.
CVE-2021-39240 3 Debian, Fedoraproject, Haproxy 3 Debian Linux, Fedora, Haproxy 2021-09-14 5.0 MEDIUM 7.5 HIGH
An issue was discovered in HAProxy 2.2 before 2.2.16, 2.3 before 2.3.13, and 2.4 before 2.4.3. It does not ensure that the scheme and path portions of a URI have the expected characters. For example, the authority field (as observed on a target HTTP/2 server) might differ from what the routing rules were intended to achieve.
CVE-2021-39242 3 Debian, Fedoraproject, Haproxy 3 Debian Linux, Fedora, Haproxy 2021-09-14 5.0 MEDIUM 7.5 HIGH
An issue was discovered in HAProxy 2.2 before 2.2.16, 2.3 before 2.3.13, and 2.4 before 2.4.3. It can lead to a situation with an attacker-controlled HTTP Host header, because a mismatch between Host and authority is mishandled.
CVE-2021-39241 3 Debian, Fedoraproject, Haproxy 3 Debian Linux, Fedora, Haproxy 2021-09-14 5.0 MEDIUM 5.3 MEDIUM
An issue was discovered in HAProxy 2.0 before 2.0.24, 2.2 before 2.2.16, 2.3 before 2.3.13, and 2.4 before 2.4.3. An HTTP method name may contain a space followed by the name of a protected resource. It is possible that a server would interpret this as a request for that protected resource, such as in the "GET /admin? HTTP/1.1 /static/images HTTP/1.1" example.
CVE-2019-11323 1 Haproxy 1 Haproxy 2021-07-21 4.3 MEDIUM 5.9 MEDIUM
HAProxy before 1.9.7 mishandles a reload with rotated keys, which triggers use of uninitialized, and very predictable, HMAC keys. This is related to an include/types/ssl_sock.h error.
CVE-2020-11100 3 Debian, Haproxy, Redhat 3 Debian Linux, Haproxy, Openshift Container Platform 2020-12-24 6.5 MEDIUM 8.8 HIGH
In hpack_dht_insert in hpack-tbl.c in the HPACK decoder in HAProxy 1.8 through 2.x before 2.1.4, a remote attacker can write arbitrary bytes around a certain location on the heap via a crafted HTTP/2 request, possibly causing remote code execution.
CVE-2019-18277 1 Haproxy 1 Haproxy 2020-08-24 4.3 MEDIUM 7.5 HIGH
A flaw was found in HAProxy before 2.0.6. In legacy mode, messages featuring a transfer-encoding header missing the "chunked" value were not being correctly rejected. The impact was limited but if combined with the "http-reuse always" setting, it could be used to help construct an HTTP request smuggling attack against a vulnerable component employing a lenient parser that would ignore the content-length header as soon as it saw a transfer-encoding one (even if not entirely valid according to the specification).
CVE-2019-14241 1 Haproxy 1 Haproxy 2020-08-24 5.0 MEDIUM 7.5 HIGH
HAProxy through 2.0.2 allows attackers to cause a denial of service (ha_panic) via vectors related to htx_manage_client_side_cookies in proto_htx.c.
CVE-2019-19330 3 Canonical, Debian, Haproxy 3 Ubuntu Linux, Debian Linux, Haproxy 2020-04-01 7.5 HIGH 9.8 CRITICAL
The HTTP/2 implementation in HAProxy before 2.0.10 mishandles headers, as demonstrated by carriage return (CR, ASCII 0xd), line feed (LF, ASCII 0xa), and the zero character (NUL, ASCII 0x0), aka Intermediary Encapsulation Attacks.
CVE-2019-14243 1 Haproxy 1 Proxyprotocol 2019-12-16 5.0 MEDIUM 7.5 HIGH
headerv2.go in mastercactapus proxyprotocol before 0.0.2, as used in the mastercactapus caddy-proxyprotocol plugin through 0.0.2 for Caddy, allows remote attackers to cause a denial of service (webserver panic and daemon crash) via a crafted HAProxy PROXY v2 request with truncated source/destination address data.
CVE-2018-20103 3 Canonical, Haproxy, Redhat 3 Ubuntu Linux, Haproxy, Openshift Container Platform 2019-10-03 5.0 MEDIUM 7.5 HIGH
An issue was discovered in dns.c in HAProxy through 1.8.14. In the case of a compressed pointer, a crafted packet can trigger infinite recursion by making the pointer point to itself, or create a long chain of valid pointers resulting in stack exhaustion.
CVE-2018-14645 3 Canonical, Haproxy, Redhat 5 Ubuntu Linux, Haproxy, Enterprise Linux and 2 more 2019-07-23 5.0 MEDIUM 7.5 HIGH
A flaw was discovered in the HPACK decoder of HAProxy, before 1.8.14, that is used for HTTP/2. An out-of-bounds read access in hpack_valid_idx() resulted in a remote crash and denial of service.
CVE-2015-3281 5 Canonical, Debian, Haproxy and 2 more 12 Ubuntu Linux, Debian Linux, Haproxy and 9 more 2019-06-26 5.0 MEDIUM N/A
The buffer_slow_realign function in HAProxy 1.5.x before 1.5.14 and 1.6-dev does not properly realign a buffer that is used for pending outgoing data, which allows remote attackers to obtain sensitive information (uninitialized memory contents of previous requests) via a crafted request.
CVE-2018-11469 2 Canonical, Haproxy 2 Ubuntu Linux, Haproxy 2019-06-11 4.3 MEDIUM 5.9 MEDIUM
Incorrect caching of responses to requests including an Authorization header in HAProxy 1.8.0 through 1.8.9 (if cache enabled) allows attackers to achieve information disclosure via an unauthenticated remote request, related to the proto_http.c check_request_for_cacheability function.
CVE-2018-20102 3 Canonical, Haproxy, Redhat 3 Ubuntu Linux, Haproxy, Openshift Container Platform 2019-06-11 5.0 MEDIUM 7.5 HIGH
An out-of-bounds read in dns_validate_dns_response in dns.c was discovered in HAProxy through 1.8.14. Due to a missing check when validating DNS responses, remote attackers might be able read the 16 bytes corresponding to an AAAA record from the non-initialized part of the buffer, possibly accessing anything that was left on the stack, or even past the end of the 8193-byte buffer, depending on the value of accepted_payload_size.
CVE-2018-20615 4 Canonical, Haproxy, Opensuse and 1 more 5 Ubuntu Linux, Haproxy, Leap and 2 more 2019-04-25 5.0 MEDIUM 7.5 HIGH
An out-of-bounds read issue was discovered in the HTTP/2 protocol decoder in HAProxy 1.8.x and 1.9.x through 1.9.0 which can result in a crash. The processing of the PRIORITY flag in a HEADERS frame requires 5 extra bytes, and while these bytes are skipped, the total frame length was not re-checked to make sure they were present in the frame.
CVE-2018-10184 2 Haproxy, Redhat 2 Haproxy, Enterprise Linux 2018-06-18 5.0 MEDIUM 7.5 HIGH
An issue was discovered in HAProxy before 1.8.8. The incoming H2 frame length was checked against the max_frame_size setting instead of being checked against the bufsize. The max_frame_size only applies to outgoing traffic and not to incoming, so if a large enough frame size is advertised in the SETTINGS frame, a wrapped frame will be defragmented into a temporary allocated buffer where the second fragment may overflow the heap by up to 16 kB. It is very unlikely that this can be exploited for code execution given that buffers are very short lived and their addresses not realistically predictable in production, but the likelihood of an immediate crash is absolutely certain.
CVE-2016-2102 1 Haproxy 1 Haproxy 2017-08-29 5.0 MEDIUM 5.3 MEDIUM
HAProxy statistics in openstack-tripleo-image-elements are non-authenticated over the network.
CVE-2012-2942 1 Haproxy 1 Haproxy 2017-08-29 5.1 MEDIUM N/A
Buffer overflow in the trash buffer in the header capture functionality in HAProxy before 1.4.21, when global.tune.bufsize is set to a value greater than the default and header rewriting is enabled, allows remote attackers to cause a denial of service and possibly execute arbitrary code via unspecified vectors.
CVE-2013-2175 4 Canonical, Debian, Haproxy and 1 more 4 Ubuntu Linux, Debian Linux, Haproxy and 1 more 2016-12-07 5.0 MEDIUM N/A
HAProxy 1.4 before 1.4.24 and 1.5 before 1.5-dev19, when configured to use hdr_ip or other "hdr_*" functions with a negative occurrence count, allows remote attackers to cause a denial of service (negative array index usage and crash) via an HTTP header with a certain number of values, related to the MAX_HDR_HISTORY variable.