Bug 1180024 (CVE-2020-29511)

Summary:	VUL-0: CVE-2020-29511: go1.14,go1.15: The encoding/xml package in Go (all versions) does not correctly preserve the semantics of element namespace prefixes during tokenization round-trips, which allows an attacker to craft inputs that behav
Product:	[Novell Products] SUSE Security Incidents	Reporter:	Marcus Meissner <meissner>
Component:	Incidents	Assignee:	Security Team bot <security-team>
Status:	RESOLVED WONTFIX	QA Contact:	Security Team bot <security-team>
Severity:	Minor
Priority:	P3 - Medium	CC:	smash_bz, wolfgang.frisch
Version:	unspecified
Target Milestone:	---
Hardware:	Other
OS:	Other
URL:	https://smash.suse.de/issue/273375/
Whiteboard:	CVSSv3.1:SUSE:CVE-2020-29511:7.5:(AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N)
Found By:	Security Response Team	Services Priority:
Business Priority:		Blocker:	---
Marketing QA Status:	---	IT Deployment:	---

Description Marcus Meissner 2020-12-15 06:48:18 UTC

CVE-2020-29511

The encoding/xml package in Go (all versions) does not correctly preserve the
semantics of element namespace prefixes during tokenization round-trips, which
allows an attacker to craft inputs that behave in conflicting ways during
different stages of processing in affected downstream applications.

References:
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-29511
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-29511
https://github.com/mattermost/xml-roundtrip-validator/blob/master/advisories/unstable-elements.md

Comment 1 Wolfgang Frisch 2021-01-20 09:49:18 UTC

Upstream golang declared this bug as WONTFIX [1].
Affected users can workaround the vulnerability by using Mattermost's xml-roundtrip-validator [2].

[1] https://github.com/golang/go/issues/43168
[2] https://github.com/mattermost/xml-roundtrip-validator