Bug 39440

Summary:	libidn: Multiple issues (4.1)
Product:	UCS	Reporter:	Arvid Requate <requate>
Component:	Security updates	Assignee:	Janek Walkenhorst <walkenhorst>
Status:	CLOSED FIXED	QA Contact:	Arvid Requate <requate>
Severity:	normal
Priority:	P2	CC:	gohmann
Version:	UCS 4.1	Flags:	requate: Patch_Available+
Target Milestone:	UCS 4.1-3-errata
Hardware:	Other
OS:	Linux
What kind of report is it?:	Security Issue	What type of bug is this?:	---
Who will be affected by this bug?:	---	How will those affected feel about the bug?:	---
User Pain:		Enterprise Customer affected?:
School Customer affected?:		ISV affected?:
Waiting Support:		Flags outvoted (downgraded) after PO Review:
Ticket number:		Bug group (optional):	Security
Max CVSS v3 score:
Bug Depends on:
Bug Blocks:	41949

Description Arvid Requate

2015-09-30 10:13:05 CEST

* The stringprep_utf8_to_ucs4 function in libidn before 1.31, as used in jabberd2 and other applications, allows context-dependent attackers to read system memory and possibly have other unspecified impact via invalid UTF-8 characters in a string, which triggers an out-of-bounds read (CVE-2015-2059)

GNU Libidn is a fully documented implementation of the Stringprep, Punycode and IDNA specifications. Libidn's purpose is to encode and decode internationalized domain names.

Possibly affects gnutls, wget, and curl

Comment 1 Arvid Requate

2016-05-23 18:17:29 CEST

Upstream Debian package version 1.25-2+deb7u1 fixes this issue.

Comment 2 Arvid Requate

2016-08-09 17:23:45 CEST

Upstream Debian package version 1.25-2+deb7u2 fixes the following issues:

* Solve out-of-bounds-read when reading one zero byte as input (CVE-2015-8948)
* out-of-bounds stack read in idna_to_ascii_4i (CVE-2016-6261)
* stringprep_utf8_nfkc_normalize reject invalid UTF-8 (CVE-2016-6263)

CVE-2015-8948: CVSS v2 base score: 2.6 (AV:N/AC:H/Au:N/C:P/I:N/A:N)
CVE-2016-6261: CVSS v2 base score: 2.6 (AV:N/AC:H/Au:N/C:P/I:N/A:N)
CVE-2016-6263: CVSS v2 base score: 2.6 (AV:N/AC:H/Au:N/C:N/I:N/A:P)

Comment 3 Janek Walkenhorst

2016-08-26 13:04:43 CEST

Tests (i386): OK
Advisory: libidn.yaml

Comment 4 Arvid Requate

2016-09-05 17:56:11 CEST

Verified:
* 1.25-2+deb7u2 imported and built
* No UCS patches
* Package update Ok (amd64)
* Advisory Ok

Comment 5 Janek Walkenhorst

2016-09-07 18:41:39 CEST

<http://errata.software-univention.de/ucs/4.1/240.html>