CVE-2019-1010220: tcpdump.org tcpdump 4.9.2 is affected by: CWE-126: Buffer Over-read

Routine

LOW 3.3DOWNGRADE

CVE-2019-1010220 is a low-severity flaw (CVSS 3.3) affecting tcpdump. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

tcpdump.org tcpdump 4.9.2 is affected by: CWE-126: Buffer Over-read. The impact is: May expose Saved Frame Pointer, Return Address etc. on stack. The component is: line 234: "ND_PRINT((ndo, "%s", buf));", in function named "print_prefix", in "print-hncp.c". The attack vector is: The victim must open a specially crafted pcap file.

Why this priority

No elevated risk signals yet

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	3.3 (Low)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	1.3% (top 29%)
CISA exploited list	No
Weakness	CWE-126, CWE-125
Published	2019-07-22
Last modified	2026-06-17

Publisher (CNA): DWF · Vendor: tcpdump

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2019-07-22 18:15 UTCPublished CVE record published
2026-06-17 02:09 UTCUpdated Record last modified

tcpdump tcpdump DOWNGRADE

Affected: 4.9.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 4.9.2

1. Check installed version

apt-cache policy tcpdump || rpm -q tcpdump || tcpdump --version

2. No fixed release: DOWNGRADE to a release before 4.9.2 (Debian / Ubuntu)

apt-cache madison tcpdump sudo apt install tcpdump=<VERSION_BEFORE_4.9.2> sudo apt-mark hold tcpdump

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list tcpdump sudo dnf downgrade tcpdump-<VERSION_BEFORE_4.9.2> sudo dnf versionlock add tcpdump

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2019-1010220?

tcpdump: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2019-1010220 being exploited?

CVE-2019-1010220 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2019-1010220 affect?

CVE-2019-1010220 affects tcpdump. Severity is low (CVSS 3.3). tcpdump.org tcpdump 4.9.2 is affected by: CWE-126: Buffer Over-read. The impact is: May expose Saved Frame Pointer, Return Address etc. on stack. The component is: line 234: "ND_PRINT((ndo, "%s", buf));", in function named "print_prefix", i

How urgent is CVE-2019-1010220?

Priority 29/100. No elevated risk signals yet.

Related CVEs

CVE-2018-16301 HIGH 7.8 UPGRADE The command-line argument parser in tcpdump before 4.99.0 has a buffer overflow in tcpdump.c:read_infile()
CVE-2023-1801 MEDIUM 6.5 DOWNGRADE The SMB protocol decoder in tcpdump version 4.99.3 can perform an out-of-bounds write when decoding a crafted
CVE-2020-8037 HIGH 7.5 DOWNGRADE MITIGATE The ppp decapsulator in tcpdump 4.9.3 can be convinced to allocate a large amount of memory.
CVE-2020-8036 HIGH 7.5 DOWNGRADE The tok2strbuf() function in tcpdump 4.10.0-PRE-GIT was used by the SOME/IP dissector in an unsafe way.
CVE-2019-15167 CRITICAL 9.1 UPGRADE The VRRP parser in tcpdump before 4.9.3 has a buffer over-read in print-vrrp.c:vrrp_print() for VRRP version 3

References

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