golang-github-pires-go-proxyproto: CVE-2021-23351

Debian Bug report logs - #985025
golang-github-pires-go-proxyproto: CVE-2021-23351

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Message #5 received at submit@bugs.debian.org (full text, mbox, reply):

From: Salvatore Bonaccorso <carnil@debian.org>

To: Debian Bug Tracking System <submit@bugs.debian.org>

Subject: golang-github-pires-go-proxyproto: CVE-2021-23351

Date: Thu, 11 Mar 2021 22:01:45 +0100

Source: golang-github-pires-go-proxyproto
Version: 0.4.1-1
Severity: important
Tags: security upstream
Forwarded: https://github.com/pires/go-proxyproto/issues/69
X-Debbugs-Cc: carnil@debian.org, Debian Security Team <team@security.debian.org>

Hi,

The following vulnerability was published for golang-github-pires-go-proxyproto.

CVE-2021-23351[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.


If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.

For further information see:

[0] https://security-tracker.debian.org/tracker/CVE-2021-23351
    https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-23351
[1] https://github.com/pires/go-proxyproto/issues/69
[2] https://github.com/pires/go-proxyproto/commit/7f48261db810703d173f27f3309a808cc2b49b8b
[3] https://snyk.io/vuln/SNYK-GOLANG-GITHUBCOMPIRESGOPROXYPROTO-1081577

Regards,
Salvatore

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