The SMB parser in tcpdump before 4.9.3 has buffer over-reads in print-smb.c:print_trans() for \MAILSLOT\BROWSE and \PIPE\LANMAN.

Published 7 y ago 2019-10-03 · modified 4 mo ago 2026-06-17 · JSON

CVSS

9.8

v3.1 · CNA

CISA KEV

not known exploited

EPSS

4.1%

percentile 91%

Public exploits

none known

The SMB parser in tcpdump before 4.9.3 has buffer over-reads in print-smb.c:print_trans() for \MAILSLOT\BROWSE and \PIPE\LANMAN.

CISA SSVC assessment

Exploitation: none
Automatable: no
Technical impact: total
Assessed: 11 mo ago 2025-12-03

Exploit prediction (EPSS)

4.13% probability of exploitation in the next 30 days, higher than 91% of all scored CVEs.

CVSS scores

Assigned by	Version	Score	Vector
CISA ADP	3.1	9.8	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`
NVD	3.1	7.5	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`
CNA	3.1	9.8	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`
NVD	2.0	5.0	`AV:N/AC:L/Au:N/C:N/I:N/A:P`

Classification

Weakness

CWE-125 Out-of-bounds Read

References

github.com /the-tcpdump-group/tcpdump/blob/tcpdump-4.9/CHANGES · x_refsource_MISC, x_transferred
github.com /the-tcpdump-group/tcpdump/commit/96480ab95308cd9234b4f09b175ebf60e17792c6 · x_refsource_CONFIRM, x_transferred
lists.debian.org /debian-lts-announce/2019/10/msg00015.html · mailing-list, x_refsource_MLIST, x_transferred
lists.opensuse.org /opensuse-security-announce/2019-10/msg00050.html · vendor-advisory, x_refsource_SUSE, x_transferred
lists.opensuse.org /opensuse-security-announce/2019-10/msg00053.html · vendor-advisory, x_refsource_SUSE, x_transferred
seclists.org /bugtraq/2019/Oct/28 · mailing-list, x_refsource_BUGTRAQ, x_transferred
debian.org /security/2019/dsa-4547 · vendor-advisory, x_refsource_DEBIAN, x_transferred
lists.fedoraproject.org /archives/list/package-announce%40lists.fedoraproject.org/message/R2UDPOSGVJQIYC33SQBXMDXH · vendor-advisory, x_refsource_FEDORA, x_transferred
lists.fedoraproject.org /archives/list/package-announce%40lists.fedoraproject.org/message/FNYXF3IY2X65IOD422SA6EQU · vendor-advisory, x_refsource_FEDORA, x_transferred
lists.fedoraproject.org /archives/list/package-announce%40lists.fedoraproject.org/message/62XY42U6HY3H2APR5EHNWCZ7 · vendor-advisory, x_refsource_FEDORA, x_transferred
support.apple.com /kb/HT210788 · x_refsource_CONFIRM, x_transferred
seclists.org /bugtraq/2019/Dec/23 · mailing-list, x_refsource_BUGTRAQ, x_transferred
seclists.org /fulldisclosure/2019/Dec/26 · mailing-list, x_refsource_FULLDISC, x_transferred
security.netapp.com /advisory/ntap-20200120-0001/ · x_refsource_CONFIRM, x_transferred
usn.ubuntu.com /4252-2/ · vendor-advisory, x_refsource_UBUNTU, x_transferred
usn.ubuntu.com /4252-1/ · vendor-advisory, x_refsource_UBUNTU, x_transferred

Sources

CVE List: CVE-2018-16451
NVD: CVE-2018-16451

vulnwire keeps one entry per vulnerability: the CVE id wins, then GHSA; records that alias each other are merged. Machine-readable: JSON.