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CVE-2016-4021

The read_binary function in buffer.c in pgpdump before 0.30 allows context-dependent attackers to...

7.5 HighFix available

The read_binary function in buffer.c in pgpdump before 0.30 allows context-dependent attackers to cause a denial of service (infinite loop and CPU consumption) via crafted input, as demonstrated by the \xa3\x03 string.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
High

Exploit likelihood

1.82%Up 0.7 points since Feb 4, 2022
90%50%10%1%

What each source reports

NVD Score used 7.5

The read_binary function in buffer.c in pgpdump before 0.30 allows context-dependent attackers to cause a denial of service (infinite loop and CPU consumption) via crafted input, as demonstrated by the \xa3\x03 string.

Record
CVE-2016-4021
CVSS 3.0
7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.0
7.8 HighAV:N/AC:L/Au:N/C:N/I:N/A:C
Weakness
CWE-399
Updated
2026-11-02
CVE List No score

The read_binary function in buffer.c in pgpdump before 0.30 allows context-dependent attackers to cause a denial of service (infinite loop and CPU consumption) via crafted input, as demonstrated by the \xa3\x03 string.

Record
CVE-2016-4021
Updated
2026-11-02
EUVDEUVD-2016-5027 No score

The read_binary function in buffer.c in pgpdump before 0.30 allows context-dependent attackers to cause a denial of service (infinite loop and CPU consumption) via crafted input, as demonstrated by the \xa3\x03 string.

Record
EUVD-2016-5027
Updated
2026-11-03
GitHub AdvisoriesGHSA-5xfq-6ph6-q9hw 7.5

The read_binary function in buffer.c in pgpdump before 0.30 allows context-dependent attackers to...

The read_binary function in buffer.c in pgpdump before 0.30 allows context-dependent attackers to cause a denial of service (infinite loop and CPU consumption) via crafted input, as demonstrated by the \xa3\x03 string.

Record
GHSA-5xfq-6ph6-q9hw
CVSS 3.0
7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSV 7.5

The read_binary function in buffer.c in pgpdump before 0.30 allows context-dependent attackers to cause a denial of service (infinite loop and CPU consumption) via crafted input, as demonstrated by the \xa3\x03 string.

Record
CVE-2016-4021
CVSS 3.0
7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVDEBIAN-CVE-2016-4021 7.5

The read_binary function in buffer.c in pgpdump before 0.30 allows context-dependent attackers to cause a denial of service (infinite loop and CPU consumption) via crafted input, as demonstrated by the \xa3\x03 string.

Record
DEBIAN-CVE-2016-4021
CVSS 3.0
7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2016-4021 7.5

The read_binary function in buffer.c in pgpdump before 0.30 allows context-dependent attackers to cause a denial of service (infinite loop and CPU consumption) via crafted input, as demonstrated by the \xa3\x03 string.

Record
UBUNTU-CVE-2016-4021
CVSS 3.0
7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVMGASA-2016-0157 No score

Updated pgpdump packages fix security vulnerability

When pgpdump is run on specially crafted input, a denial of service condition occurs. The program runs with 100% CPU usage for an indefinite amount of time. A remote attacker is able to create a specially crafted input that is leading to CPU resource consumption resulting in denial of service (CVE-2016-4021).

Record
MGASA-2016-0157
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
pgpdump
Debian:12
before 0.31-0.1
0.31-0.1
pgpdump
Debian:13
before 0.31-0.1
0.31-0.1
pgpdump
Debian:14
before 0.31-0.1
0.31-0.1
pgpdump
Debian:7
before 0.27-1+deb7u1, plus listed versions
0.27-1
0.27-1+deb7u1
pgpdump
Mageia:5
before 0.30-1.mga5
0.30-1.mga5
pgpdump
Ubuntu:14.04:LTS
before 0.28-1+deb8u1build0.14.04.1, plus listed versions
0.27-10.28-1
0.28-1+deb8u1build0.14.04.1
pgpdump
Ubuntu:16.04:LTS
All versions, plus listed versions
0.28-10.29-1
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-2016-4021 is a high vulnerability (CVSS 7.5) in Pgpdump Project Pgpdump, published April 29, 2016. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.82%, the 78th percentile. Fixed in pgpdump 0.31-0.1.

References

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