Input validation error in GnuPG - CVE-2015-1607
Published: November 20, 2019 / Updated: July 17, 2020
Vulnerability identifier: #VU30594
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2015-1607
CWE-ID: CWE-20
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: GNU
Affected software:
GnuPG
GnuPG
Detailed vulnerability description
The vulnerability allows a local non-authenticated attacker to perform a denial of service (DoS) attack.
kbx/keybox-search.c in GnuPG before 1.4.19, 2.0.x before 2.0.27, and 2.1.x before 2.1.2 does not properly handle bitwise left-shifts, which allows remote attackers to cause a denial of service (invalid read operation) via a crafted keyring file, related to sign extensions and "memcpy with overlapping ranges."
How to mitigate CVE-2015-1607
Install update from vendor's website.
Sources
- http://git.gnupg.org/cgi-bin/gitweb.cgi?p=gnupg.git;a=commit;h=2183683bd633818dd031b090b5530951de76f392
- http://www.openwall.com/lists/oss-security/2015/02/13/14
- http://www.openwall.com/lists/oss-security/2015/02/14/6
- http://www.securityfocus.com/bid/72610
- http://www.ubuntu.com/usn/usn-2554-1/
- https://blog.fuzzing-project.org/5-Multiple-issues-in-GnuPG-found-through-keyring-fuzzing-TFPA-0012015.html
- https://lists.gnupg.org/pipermail/gnupg-announce/2015q1/000361.html
- https://lists.gnupg.org/pipermail/gnupg-announce/2015q1/000362.html
- https://lists.gnupg.org/pipermail/gnupg-announce/2015q1/000363.html