UBUNTU-CVE-2021-23351

See a problem?
Please try reporting it to the source first.
Source
https://ubuntu.com/security/CVE-2021-23351
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-23351.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2021-23351
Related
Published
2021-03-08T05:15:00Z
Modified
2025-04-23T15:01:54Z
Severity
  • 4.9 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
[none]
Details

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.

References

Affected packages

Ubuntu:22.04:LTS / golang-github-pires-go-proxyproto

Package

Name
golang-github-pires-go-proxyproto
Purl
pkg:deb/ubuntu/golang-github-pires-go-proxyproto@0.4.2-1?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

0.*

0.4.2-1

Ecosystem specific 

{
    "ubuntu_priority": "medium"
}

Ubuntu:24.10 / golang-github-pires-go-proxyproto

Package

Name
golang-github-pires-go-proxyproto
Purl
pkg:deb/ubuntu/golang-github-pires-go-proxyproto@0.7.0-1?arch=source&distro=oracular

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

0.*

0.7.0-1

Ecosystem specific 

{
    "ubuntu_priority": "medium"
}

Ubuntu:24.04:LTS / golang-github-pires-go-proxyproto

Package

Name
golang-github-pires-go-proxyproto
Purl
pkg:deb/ubuntu/golang-github-pires-go-proxyproto@0.7.0-1?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

0.*

0.6.0-2
0.7.0-1

Ecosystem specific 

{
    "ubuntu_priority": "medium"
}

Ubuntu:25.04 / golang-github-pires-go-proxyproto

Package

Name
golang-github-pires-go-proxyproto
Purl
pkg:deb/ubuntu/golang-github-pires-go-proxyproto@0.7.0-1?arch=source&distro=plucky

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

0.*

0.7.0-1

Ecosystem specific 

{
    "ubuntu_priority": "medium"
}