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CVE-2018-18456

The function Object::isName() in Object.h (called from Gfx::opSetFillColorN) in Xpdf 4.00 allows...

5.5 MediumFix available

The function Object::isName() in Object.h (called from Gfx::opSetFillColorN) in Xpdf 4.00 allows remote attackers to cause a denial of service (stack-based buffer over-read) via a crafted pdf file, as demonstrated by pdftoppm.

Attack profile

How easy it is to exploit

Attack vector
Local
Complexity
Low
Privileges needed
None
User interaction
Required

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
High

Exploit likelihood

1.26%Up 0.3 points since Apr 14, 2021
90%50%10%1%

What each source reports

NVD Score used 5.5

The function Object::isName() in Object.h (called from Gfx::opSetFillColorN) in Xpdf 4.00 allows remote attackers to cause a denial of service (stack-based buffer over-read) via a crafted pdf file, as demonstrated by pdftoppm.

Record
CVE-2018-18456
CVSS 3.0
5.5 MediumCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CVSS 2.0
4.3 MediumAV:N/AC:M/Au:N/C:N/I:N/A:P
Weakness
CWE-125
Updated
2026-11-02
CVE List No score

The function Object::isName() in Object.h (called from Gfx::opSetFillColorN) in Xpdf 4.00 allows remote attackers to cause a denial of service (stack-based buffer over-read) via a crafted pdf file, as demonstrated by pdftoppm.

Record
CVE-2018-18456
Updated
2026-11-02
EUVDEUVD-2018-10184 No score

The function Object::isName() in Object.h (called from Gfx::opSetFillColorN) in Xpdf 4.00 allows remote attackers to cause a denial of service (stack-based buffer over-read) via a crafted pdf file, as demonstrated by pdftoppm.

Record
EUVD-2018-10184
Updated
2026-11-03
GitHub AdvisoriesGHSA-cjwm-4p9f-wr64 5.5

The function Object::isName() in Object.h (called from Gfx::opSetFillColorN) in Xpdf 4.00 allows...

The function Object::isName() in Object.h (called from Gfx::opSetFillColorN) in Xpdf 4.00 allows remote attackers to cause a denial of service (stack-based buffer over-read) via a crafted pdf file, as demonstrated by pdftoppm.

Record
GHSA-cjwm-4p9f-wr64
CVSS 3.0
5.5 MediumCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Weakness
CWE-125
Updated
2026-11-02
OSV 5.5

The function Object::isName() in Object.h (called from Gfx::opSetFillColorN) in Xpdf 4.00 allows remote attackers to cause a denial of service (stack-based buffer over-read) via a crafted pdf file, as demonstrated by pdftoppm.

Record
CVE-2018-18456
CVSS 3.0
5.5 MediumCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVDEBIAN-CVE-2018-18456 5.5

The function Object::isName() in Object.h (called from Gfx::opSetFillColorN) in Xpdf 4.00 allows remote attackers to cause a denial of service (stack-based buffer over-read) via a crafted pdf file, as demonstrated by pdftoppm.

Record
DEBIAN-CVE-2018-18456
CVSS 3.0
5.5 MediumCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2018-18456 5.5

The function Object::isName() in Object.h (called from Gfx::opSetFillColorN) in Xpdf 4.00 allows remote attackers to cause a denial of service (stack-based buffer over-read) via a crafted pdf file, as demonstrated by pdftoppm.

Record
UBUNTU-CVE-2018-18456
CVSS 3.0
5.5 MediumCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVSUSE-SU-2023:4187-1 No score

Security update for poppler

This update for poppler fixes the following issues:

  • CVE-2019-13287: Fixed an out-of-bounds read vulnerability in the function SplashXPath:strokeAdjust. (bsc#1140745)
  • CVE-2018-18456: Fixed a stack-based buffer over-read via a crafted pdf file. (bsc#1112428)
  • CVE-2018-18454: Fixed heap-based buffer over-read) via a crafted pdf file. (bsc#1112424)
  • CVE-2020-36023: Fixed a stack bugger overflow in FoFiType1C:cvtGlyph. (bsc#1214256)
Record
SUSE-SU-2023:4187-1
Updated
2026-11-02
OSVSUSE-SU-2023:4362-1 No score

Security update for poppler

This update for poppler fixes the following issues:

  • CVE-2019-9545: Fixed a potential crash due to uncontrolled recursion in the JBIG parser (bsc#1128114).
  • CVE-2019-9631: Fixed an out of bounds read when converting a PDF to an image (bsc#1129202).
  • CVE-2022-37052: Fixed a reachable assertion when extracting pages of a PDf file (bsc#1214726).
  • CVE-2020-36023: Fixed a stack bugger overflow in FoFiType1C:cvtGlyph (bsc#1214256).
  • CVE-2019-13287: Fixed an out-of-bounds read vulnerability in the function SplashXPath:strokeAdjust (bsc#1140745).
  • CVE-2018-18456: Fixed a stack-based buffer over-read via a crafted pdf file (bsc#1112428).
  • CVE-2018-18454: Fixed heap-based buffer over-read via a crafted pdf file (bsc#1112424).
  • CVE-2019-14292: Fixed an out of bounds read in GfxState.cc (bsc#1143570).
  • CVE-2022-48545: Fixed an infinite recursion in Catalog::findDestInTree which can cause denial of service (bsc#1214723).
Record
SUSE-SU-2023:4362-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
xpdf
Debian:12
 All versions, plus listed versions
3.04+git20220601-13.04+git20231213-13.04+git20240118-13.04+git20240124-13.04+git20240202-1
Show 5 moreShow less
3.04+git20240613-13.04+git20250103-13.04+git20250304-13.04+git20260220-13.04+git20260802-1
 None known
xpdf
Debian:13
 All versions, plus listed versions
3.04+git20250304-13.04+git20260220-13.04+git20260802-1
 None known
xpdf
Debian:14
 All versions, plus listed versions
3.04+git20250304-13.04+git20260220-13.04+git20260802-1
 None known
poppler
openSUSE:Leap 15.4
 before 0.62.0-150000.4.28.2
0.62.0-150000.4.28.2
poppler
SUSE:Linux Enterprise Software Development Kit 12 SP5
 before 0.43.0-16.40.1
0.43.0-16.40.1
poppler-qt
SUSE:Linux Enterprise Software Development Kit 12 SP5
 before 0.43.0-16.40.1
0.43.0-16.40.1
poppler
SUSE:Linux Enterprise Server 12 SP5
 before 0.43.0-16.40.1
0.43.0-16.40.1
poppler-qt
SUSE:Linux Enterprise Server 12 SP5
 before 0.43.0-16.40.1
0.43.0-16.40.1
poppler
SUSE:Linux Enterprise Server for SAP Applications 12 SP5
 before 0.43.0-16.40.1
0.43.0-16.40.1
poppler-qt
SUSE:Linux Enterprise Server for SAP Applications 12 SP5
 before 0.43.0-16.40.1
0.43.0-16.40.1
Show 15 moreShow less
Affected packages
PackageAffectedFixed
ipe
Ubuntu:16.04:LTS
 All versions, plus listed versions
7.1.4-2.17.1.8-17.1.10-17.1.10-1.1
 None known
xpdf
Ubuntu:16.04:LTS
 All versions, plus listed versions
3.03-17ubuntu23.03-17ubuntu33.03-17ubuntu53.03-183.04-13.04-1build13.04-1ubuntu13.04-1ubuntu1.1
 None known
ipe
Ubuntu:18.04:LTS
 All versions, plus listed versions
7.2.7-27.2.7-3
 None known
xpdf
Ubuntu:18.04:LTS
 All versions, plus listed versions
3.04-4build13.04-53.04-5ubuntu23.04-6ubuntu13.04-7
 None known
ipe
Ubuntu:20.04:LTS
 All versions, plus listed versions
7.2.9-17.2.13-27.2.13-2build1
 None known
ipe
Ubuntu:22.04:LTS
 All versions, plus listed versions
7.2.23+dfsg1-27.2.24+dfsg1-17.2.24+dfsg1-1build1
 None known
xpdf
Ubuntu:22.04:LTS
 All versions, plus listed versions
3.04+git20210103-3build13.04+git20211021-13.04+git20211021-1ubuntu13.04+git20220201-1
 None known
ipe
Ubuntu:24.04:LTS
 All versions, plus listed versions
7.2.27+dfsg1-27.2.28-27.2.28-2.1build27.2.28-2.1build37.2.28-2.1build4
 None known
xpdf
Ubuntu:24.04:LTS
 All versions, plus listed versions
3.04+git20220601-1ubuntu13.04+git20220601-1ubuntu23.04+git20231213-13.04+git20240118-13.04+git20240124-1
Show 4 moreShow less
3.04+git20240202-13.04+git20240202-1build13.04+git20240202-1build23.04+git20240202-1build3
 None known
ipe
Ubuntu:25.10
 All versions, plus listed versions
7.2.30-1build1
 None known
xpdf
Ubuntu:25.10
 All versions, plus listed versions
3.04+git20250304-1
 None known
ipe
Ubuntu:26.10
 All versions, plus listed versions
7.2.30-1build27.2.30-2
 None known
xpdf
Ubuntu:26.10
 All versions, plus listed versions
3.04+git20260220-13.04+git20260220-1ubuntu13.04+git20260802-1
 None known
ipe
Ubuntu:26.04:LTS
 All versions, plus listed versions
7.2.30-1build17.2.30-1build2
 None known
xpdf
Ubuntu:26.04:LTS
 All versions, plus listed versions
3.04+git20250304-13.04+git20250304-1build13.04+git20260220-1
 None known

History

History
RecordedChangedSources
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2018-18456 is a medium vulnerability (CVSS 5.5) in Xpdfreader Xpdf, published October 18, 2018. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.26%, the 69th percentile. Fixed in poppler 0.62.0-150000.4.28.2.

References

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