Buffer overflow in Gnupg Libksba
CVE-2016-4356
The append_utf8_value function in the DN decoder (dn.c) in Libksba before 1.3.3 allows remote attackers to cause a denial of service (out-of-bounds read) by clearing the high bit of the byte after invalid utf-8 encoded data.
Vulnerability class: Buffer Overflow
EPSS: 0.029 (85.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Gnupg Libksba
- Canonical Ubuntu_linux — versions 12.04, 14.04
- N/a — versions n/a
Weakness classification (CWE)
References
- secalert@redhat.com (mailing-list, x_refsource_MLIST)
- secalert@redhat.com (x_refsource_UBUNTU, vendor-advisory)
- secalert@redhat.com (mailing-list, x_refsource_MLIST)
- secalert@redhat.com (mailing-list, x_refsource_MLIST)
- secalert@redhat.com (x_refsource_CONFIRM)
- secalert@redhat.com (vendor-advisory, x_refsource_GENTOO)
Frequently asked questions
- What is CVE-2016-4356?
- CVE-2016-4356 is a high-severity vulnerability in Gnupg Libksba, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.5/10. Published 2016-06-13.
- How severe is CVE-2016-4356?
- High severity. CVSS v3 base score is 7.5 out of 10.