Internet Bug Bounty: CVE-2017-5341 The OTV parser in tcpdump before 4.9.0 has a buffer overflow in print-otv.c:otv_print()

2017-02-0217:21:27

geeknik

hackerone.com

9.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

7.5 High

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:P/I:P/A:P

0.007 Low

EPSS

Percentile

77.1%

Reported to the project maintainers in 2016. The function sig_print() did receive a correct caplen parameter value but didn’t use it correctly which could cause a read outside of buffer. Fixed by https://github.com/the-tcpdump-group/tcpdump/commit/409ffe94529df3d8bb8258bf99586f821756cb29.