Bug 38068 – libxfont: Multiple issues (4.1)

Bug 38068 - libxfont: Multiple issues (4.1)


Summary:	libxfont: Multiple issues (4.1)

Status:	CLOSED WONTFIX

Product:	UCS
Classification:	Unclassified
Component:	Security updates
Version:	UCS 4.1
Hardware:	Other Linux

Importance:	P5 normal (vote)
Target Milestone:	UCS 4.1-x-errata
Assigned To:	UCS maintainers
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Depends on:	45621
Blocks:
	Show dependency tree / graph

Reported:	2015-03-17 17:40 CET by Arvid Requate
Modified:	2019-04-11 19:25 CEST (History)
CC List:	0 users

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What kind of report is it?:	Security Issue
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Max CVSS v3 score:	6.9 (AV:L/AC:M/Au:N/C:C/I:C/A:C)

Flags:	requate: Patch_Available+

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Description Arvid Requate

2015-03-17 17:40:20 CET

CVE-2015-1802 CVE-2015-1803 CVE-2015-1804:

Possible privilege escalation of local users against X server due to insufficient range checks in libxfont during parsing of BDF font files.

Comment 1 Arvid Requate

2015-03-17 17:47:37 CET

More details:

CVE-2015-1803:

Possible X server crash due to insufficient recognition of invalid BDF font data.

CVE-2015-1804:

Out-of-bounds memory read due to insufficient boundary checking on BDF font data.

Comment 2 Arvid Requate

2015-05-06 16:51:14 CEST

Fixed in upstream Debian package version 1:1.4.5-5

Comment 3 Arvid Requate

2017-10-30 19:53:55 CET

Upstream Debian package version 1:1.4.5-5+deb7u1 fixes:

* In the PatternMatch function in fontfile/fontdir.c in libXfont through 1.5.2 and 2.x before 2.0.2, an attacker with access to an X connection can cause a buffer over-read during pattern matching of fonts, leading to information disclosure or a crash (denial of service). This occurs because '\0' characters are incorrectly skipped in situations involving ? characters. (CVE-2017-13720)
* In the pcfGetProperties function in bitmap/pcfread.c in libXfont through 1.5.2 and 2.x before 2.0.2, a missing boundary check (for PCF files) could be used by local attackers authenticated to an Xserver for a buffer over-read, for information disclosure or a crash of the X server. (CVE-2017-13722)

Comment 4 Arvid Requate

2018-04-17 15:56:08 CEST

This issue has been filed against UCS 4.1.

UCS 4.1 is out of maintenance and many UCS components have vastly changed in later releases. Thus, this issue is now being closed.

If this issue still occurs in newer UCS versions, please use "Clone this bug" or reopen this issue. In this case please provide detailed information on how this issue is affecting you.