CVE-2011-1554 [Medium] | Denial of Service in T1lib

Off-by-one error in t1lib 5.1.2 and earlier, as used in Xpdf before 3.02pl6, teTeX, and other products, allows remote attackers to cause a denial of service (application crash) via a PDF document containing a crafted Type 1 font that triggers an invalid memory read, integer overflow, and invalid pointer dereference, a different vulnerability than CVE-2011-0764.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-06-07	6.58%	4.26%	-2.32%
2	2025-03-30	10.39%	6.58%	-3.81%
3	2025-03-29	—	10.39%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-06-07

6.58%

4.26%

-2.32%

2025-03-30

10.39%

6.58%

-3.81%

2025-03-29

—

10.39%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
4.3	2.0	MEDIUM	`AV:N/AC:M/Au:N/C:N/I:N/A:P` Click to expand Access vector (AV:N) Can be exploited remotely over network reachability. Access complexity (AC:M) Exploitation needs some favorable conditions, but not exceptional ones. Authentication (AU:N) No authentication is required. Confidentiality impact (C:N) No confidentiality impact. Integrity impact (I:N) No integrity impact. Availability impact (A:P) Partial availability impact.	8.6	2.9	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

4.3

2.0

MEDIUM

AV:N/AC:M/Au:N/C:N/I:N/A:P Click to expand

Access vector (AV:N): Can be exploited remotely over network reachability.
Access complexity (AC:M): Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N): No authentication is required.
Confidentiality impact (C:N): No confidentiality impact.
Integrity impact (I:N): No integrity impact.
Availability impact (A:P): Partial availability impact.

8.6

2.9

[email protected]

OS Trackers for CVE-2011-1554

vendor	priority	summary	link
`debian`	unimportant	CVE-2011-1554 unimportant priority: Debian including 2 source packages (poppler, xpdf), 10 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 10.	https://security-tracker.debian.org/tracker/CVE-2011-1554
`gentoo`	normal	CVE-2011-1554: 1 GLSA(s) (201701-57), 1 atom(s) (media-libs/t1lib); latest impact normal.	https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2011-1554
`redhat`	medium	—	https://access.redhat.com/security/cve/CVE-2011-1554
`ubuntu`	low	CVE-2011-1554 low priority: Ubuntu including 1 source packages (t1lib), 8 status rows across 8 suites (dapper, hardy, karmic, lucid, maverick, natty, oneiric, upstream): released 4, ignored 3, needs-triage 1.	https://ubuntu.com/security/CVE-2011-1554

Affected software / configurations for CVE-2011-1554

Vendor	Product	Version	Raw CPE
t1lib	t1lib	<= 5.1.2	cpe:2.3:a:t1lib:t1lib::::::::
t1lib	t1lib	0.1	cpe:2.3:a:t1lib:t1lib:0.1:alpha::::::
t1lib	t1lib	0.2	cpe:2.3:a:t1lib:t1lib:0.2:beta::::::
t1lib	t1lib	0.3	cpe:2.3:a:t1lib:t1lib:0.3:beta::::::
t1lib	t1lib	0.4	cpe:2.3:a:t1lib:t1lib:0.4:beta::::::
t1lib	t1lib	0.5	cpe:2.3:a:t1lib:t1lib:0.5:beta::::::
t1lib	t1lib	0.6	cpe:2.3:a:t1lib:t1lib:0.6:beta::::::
t1lib	t1lib	0.7	cpe:2.3:a:t1lib:t1lib:0.7:beta::::::
t1lib	t1lib	0.8	cpe:2.3:a:t1lib:t1lib:0.8:beta::::::
t1lib	t1lib	0.9	cpe:2.3:a:t1lib:t1lib:0.9:::::::*
t1lib	t1lib	0.9.1	cpe:2.3:a:t1lib:t1lib:0.9.1:::::::*
t1lib	t1lib	0.9.2	cpe:2.3:a:t1lib:t1lib:0.9.2:::::::*
t1lib	t1lib	1.0	cpe:2.3:a:t1lib:t1lib:1.0:::::::*
t1lib	t1lib	1.0.1	cpe:2.3:a:t1lib:t1lib:1.0.1:::::::*
t1lib	t1lib	1.1.0	cpe:2.3:a:t1lib:t1lib:1.1.0:::::::*
t1lib	t1lib	1.1.1	cpe:2.3:a:t1lib:t1lib:1.1.1:::::::*
t1lib	t1lib	1.2	cpe:2.3:a:t1lib:t1lib:1.2:::::::*
t1lib	t1lib	1.3	cpe:2.3:a:t1lib:t1lib:1.3:::::::*
t1lib	t1lib	1.3.1	cpe:2.3:a:t1lib:t1lib:1.3.1:::::::*
t1lib	t1lib	5.0.0	cpe:2.3:a:t1lib:t1lib:5.0.0:::::::*
t1lib	t1lib	5.0.1	cpe:2.3:a:t1lib:t1lib:5.0.1:::::::*
t1lib	t1lib	5.0.2	cpe:2.3:a:t1lib:t1lib:5.0.2:::::::*
t1lib	t1lib	5.1.0	cpe:2.3:a:t1lib:t1lib:5.1.0:::::::*
t1lib	t1lib	5.1.1	cpe:2.3:a:t1lib:t1lib:5.1.1:::::::*
foolabs	xpdf	0.5a	cpe:2.3:a:foolabs:xpdf:0.5a:::::::*
foolabs	xpdf	0.7a	cpe:2.3:a:foolabs:xpdf:0.7a:::::::*
foolabs	xpdf	0.91a	cpe:2.3:a:foolabs:xpdf:0.91a:::::::*
foolabs	xpdf	0.91b	cpe:2.3:a:foolabs:xpdf:0.91b:::::::*
foolabs	xpdf	0.91c	cpe:2.3:a:foolabs:xpdf:0.91c:::::::*
foolabs	xpdf	0.92a	cpe:2.3:a:foolabs:xpdf:0.92a:::::::*
foolabs	xpdf	0.92b	cpe:2.3:a:foolabs:xpdf:0.92b:::::::*
foolabs	xpdf	0.92c	cpe:2.3:a:foolabs:xpdf:0.92c:::::::*
foolabs	xpdf	0.92d	cpe:2.3:a:foolabs:xpdf:0.92d:::::::*
foolabs	xpdf	0.92e	cpe:2.3:a:foolabs:xpdf:0.92e:::::::*
foolabs	xpdf	0.93a	cpe:2.3:a:foolabs:xpdf:0.93a:::::::*
foolabs	xpdf	0.93b	cpe:2.3:a:foolabs:xpdf:0.93b:::::::*
foolabs	xpdf	0.93c	cpe:2.3:a:foolabs:xpdf:0.93c:::::::*
foolabs	xpdf	1.00a	cpe:2.3:a:foolabs:xpdf:1.00a:::::::*
foolabs	xpdf	3.0.1	cpe:2.3:a:foolabs:xpdf:3.0.1:::::::*
foolabs	xpdf	3.02pl1	cpe:2.3:a:foolabs:xpdf:3.02pl1:::::::*
foolabs	xpdf	3.02pl2	cpe:2.3:a:foolabs:xpdf:3.02pl2:::::::*
foolabs	xpdf	3.02pl3	cpe:2.3:a:foolabs:xpdf:3.02pl3:::::::*
foolabs	xpdf	3.02pl4	cpe:2.3:a:foolabs:xpdf:3.02pl4:::::::*
glyphandcog	xpdfreader	<= 3.02	cpe:2.3:a:glyphandcog:xpdfreader::::::::
glyphandcog	xpdfreader	0.2	cpe:2.3:a:glyphandcog:xpdfreader:0.2:::::::*
glyphandcog	xpdfreader	0.3	cpe:2.3:a:glyphandcog:xpdfreader:0.3:::::::*
glyphandcog	xpdfreader	0.4	cpe:2.3:a:glyphandcog:xpdfreader:0.4:::::::*
glyphandcog	xpdfreader	0.5	cpe:2.3:a:glyphandcog:xpdfreader:0.5:::::::*
glyphandcog	xpdfreader	0.6	cpe:2.3:a:glyphandcog:xpdfreader:0.6:::::::*
glyphandcog	xpdfreader	0.7	cpe:2.3:a:glyphandcog:xpdfreader:0.7:::::::*
glyphandcog	xpdfreader	0.80	cpe:2.3:a:glyphandcog:xpdfreader:0.80:::::::*
glyphandcog	xpdfreader	0.90	cpe:2.3:a:glyphandcog:xpdfreader:0.90:::::::*
glyphandcog	xpdfreader	0.91	cpe:2.3:a:glyphandcog:xpdfreader:0.91:::::::*
glyphandcog	xpdfreader	0.92	cpe:2.3:a:glyphandcog:xpdfreader:0.92:::::::*
glyphandcog	xpdfreader	0.93	cpe:2.3:a:glyphandcog:xpdfreader:0.93:::::::*
glyphandcog	xpdfreader	1.00	cpe:2.3:a:glyphandcog:xpdfreader:1.00:::::::*
glyphandcog	xpdfreader	1.01	cpe:2.3:a:glyphandcog:xpdfreader:1.01:::::::*
glyphandcog	xpdfreader	2.00	cpe:2.3:a:glyphandcog:xpdfreader:2.00:::::::*
glyphandcog	xpdfreader	2.01	cpe:2.3:a:glyphandcog:xpdfreader:2.01:::::::*
glyphandcog	xpdfreader	2.02	cpe:2.3:a:glyphandcog:xpdfreader:2.02:::::::*
glyphandcog	xpdfreader	2.03	cpe:2.3:a:glyphandcog:xpdfreader:2.03:::::::*
glyphandcog	xpdfreader	3.00	cpe:2.3:a:glyphandcog:xpdfreader:3.00:::::::*
glyphandcog	xpdfreader	3.01	cpe:2.3:a:glyphandcog:xpdfreader:3.01:::::::*
glyphandcog	xpdfreader	3.02	cpe:2.3:a:glyphandcog:xpdfreader:3.02:::::::*

References for CVE-2011-1554

URL	Tags
http://rhn.redhat.com/errata/RHSA-2012-1201.html
http://secunia.com/advisories/43823	Vendor Advisory
http://secunia.com/advisories/48985
http://securityreason.com/securityalert/8171
http://securitytracker.com/id?1025266
http://www.foolabs.com/xpdf/download.html	Patch
http://www.kb.cert.org/vuls/id/376500	US Government Resource
http://www.kb.cert.org/vuls/id/MAPG-8ECL8X	US Government Resource
http://www.mandriva.com/security/advisories?name=MDVSA-2012:144
http://www.securityfocus.com/archive/1/517205/100/0/threaded
http://www.toucan-system.com/advisories/tssa-2011-01.txt
http://www.vupen.com/english/advisories/2011/0728	Vendor Advisory
https://security.gentoo.org/glsa/201701-57

URL

CVE-2011-1554

Exploit prediction scoring system (EPSS) score for CVE-2011-1554

Common vulnerability scoring system (CVSS) metrics for CVE-2011-1554

Weakness enumeration for CVE-2011-1554

OS Trackers for CVE-2011-1554

Affected software / configurations for CVE-2011-1554

References for CVE-2011-1554