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CVE-2018-18459

The function DCTStream::getBlock in Stream.cc in Xpdf 4.00 allows remote attackers to cause a...

5.5 Medium

The function DCTStream::getBlock in Stream.cc in Xpdf 4.00 allows remote attackers to cause a denial of service (NULL pointer dereference) 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

1.14%Up 0.2 points since Apr 14, 2021
90%50%10%1%

What each source reports

NVD Score used 5.5

The function DCTStream::getBlock in Stream.cc in Xpdf 4.00 allows remote attackers to cause a denial of service (NULL pointer dereference) via a crafted pdf file, as demonstrated by pdftoppm.

Record
CVE-2018-18459
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-476
Updated
2026-11-02
CVE List No score

The function DCTStream::getBlock in Stream.cc in Xpdf 4.00 allows remote attackers to cause a denial of service (NULL pointer dereference) via a crafted pdf file, as demonstrated by pdftoppm.

Record
CVE-2018-18459
Updated
2026-11-02
EUVDEUVD-2018-10187 No score

The function DCTStream::getBlock in Stream.cc in Xpdf 4.00 allows remote attackers to cause a denial of service (NULL pointer dereference) via a crafted pdf file, as demonstrated by pdftoppm.

Record
EUVD-2018-10187
Updated
2026-11-03
GitHub AdvisoriesGHSA-6p6g-2h65-337p 5.5

The function DCTStream::getBlock in Stream.cc in Xpdf 4.00 allows remote attackers to cause a...

The function DCTStream::getBlock in Stream.cc in Xpdf 4.00 allows remote attackers to cause a denial of service (NULL pointer dereference) via a crafted pdf file, as demonstrated by pdftoppm.

Record
GHSA-6p6g-2h65-337p
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-476
Updated
2026-11-02
OSV 5.5

The function DCTStream::getBlock in Stream.cc in Xpdf 4.00 allows remote attackers to cause a denial of service (NULL pointer dereference) via a crafted pdf file, as demonstrated by pdftoppm.

Record
CVE-2018-18459
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-2018-18459 5.5

The function DCTStream::getBlock in Stream.cc in Xpdf 4.00 allows remote attackers to cause a denial of service (NULL pointer dereference) via a crafted pdf file, as demonstrated by pdftoppm.

Record
DEBIAN-CVE-2018-18459
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-2018-18459 5.5

The function DCTStream::getBlock in Stream.cc in Xpdf 4.00 allows remote attackers to cause a denial of service (NULL pointer dereference) via a crafted pdf file, as demonstrated by pdftoppm.

Record
UBUNTU-CVE-2018-18459
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

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
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
Show 8 moreShow less
Affected packages
PackageAffectedFixed
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-2018-18459 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 1.14%, the 66th percentile. No source names a fixed version.

References

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