4.9 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
4 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:S/C:N/I:N/A:P
0.002 Low
EPSS
Percentile
51.0%
The package github.com/pires/go-proxyproto
before 0.5.0 are vulnerable to Denial of Service (DoS) via the parseVersion1()
function. The reader in this package is a default bufio.Reader
wrapping a net.Conn
. It will read from the connection until it finds a newline. Since no limits are implemented in the code, a deliberately malformed V1 header could be used to exhaust memory in a server process using this code - and create a DoS. This can be exploited by sending a stream starting with PROXY and continuing to send data (which does not contain a newline) until the target stops acknowledging. The risk here is small, because only trusted sources should be allowed to send proxy protocol headers.
CPE | Name | Operator | Version |
---|---|---|---|
github.com/pires/go-proxyproto | lt | 0.5.0 |
github.com/advisories/GHSA-fqh4-rh59-xhvf
github.com/pires/go-proxyproto/commit/7f48261db810703d173f27f3309a808cc2b49b8b
github.com/pires/go-proxyproto/issues/69
github.com/pires/go-proxyproto/pull/71
lists.fedoraproject.org/archives/list/[email protected]/message/4BNVGJMVI3ZTZ675EFPUHPGXCKCGSX46/
lists.fedoraproject.org/archives/list/[email protected]/message/C36IBVOZXRTWM7MGTRUTOM56P5RR74VU/
nvd.nist.gov/vuln/detail/CVE-2021-23351
snyk.io/vuln/SNYK-GOLANG-GITHUBCOMPIRESGOPROXYPROTO-1081577
4.9 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
4 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:S/C:N/I:N/A:P
0.002 Low
EPSS
Percentile
51.0%