libksba: encoding of invalid utf-8 strings in DN decoder src/dn.c (append_quoted, append_atv)
Published Jun 13, 2016
7.5
HIGHCVSS 3.0
EPSS 2.93%
Description
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.
Affected products
No data.
Configuration 2
- 12.04
- 14.04
No data.
Red Hat Enterprise Linux 5
libksba
Will not fix
Red Hat Enterprise Linux 6
libksba
Will not fix
Red Hat Enterprise Linux 7
libksba
Will not fix
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | libksba | Will not fix | n/a |
| Red Hat Enterprise Linux 6 | libksba | Will not fix | n/a |
| Red Hat Enterprise Linux 7 | libksba | Will not fix | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
AV:N/AC:L/Au:N/C:N/I:N/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (12 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 2.93% (0.02928) | 86.59th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.93% (0.02928) | 85.23th | v5 (v2026.06.15) |
| Mar 30, 2025 | 1.41% (0.01409) | 78.72th | v4 (v2025.03.14) |
| Mar 29, 2025 | 3.58% (0.03581) | 79.33th | v4 (v2025.03.14) |
| Mar 17, 2025 | 1.41% (0.01409) | 79.17th | v4 (v2025.03.14) |
| Dec 12, 2024 | 2.25% (0.02252) | 89.97th | v3 (v2023.03.01) |
| Jun 26, 2023 | 2.25% (0.02252) | 87.98th | v3 (v2023.03.01) |
| Mar 7, 2023 | 2.23% (0.02228) | 87.74th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.32% (0.01319) | 71.27th | v2 (v2022.01.01) |
| Feb 23, 2023 | 1.32% (0.01319) | 71.23th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.32% (0.01319) | 69.22th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.32% (0.01319) | 44.98th | v2 (v2022.01.01) |
References (10)
- http://git.gnupg.org/cgi-bin/gitweb.cgi?p=libksba.git%3Ba=commit%3Bh=243d12fdec66a4360fbb3e307a046b39b5b4ffc3 x_refsource_CONFIRM
- http://www.openwall.com/lists/oss-security/2016/04/29/5 mailing-listx_refsource_MLIST
- http://www.openwall.com/lists/oss-security/2016/04/29/8 mailing-listx_refsource_MLIST
- http://www.openwall.com/lists/oss-security/2016/05/10/3 mailing-listx_refsource_MLIST
- http://www.ubuntu.com/usn/USN-2982-1 vendor-advisoryx_refsource_UBUNTU
- https://access.redhat.com/security/cve/CVE-2016-4356 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1211259 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2016-4356
- https://security.gentoo.org/glsa/201604-04 vendor-advisoryx_refsource_GENTOO
- https://www.cve.org/CVERecord?id=CVE-2016-4356
| Link | Providers | Tags |
|---|---|---|
| http://git.gnupg.org/cgi-bin/gitweb.cgi?p=libksba.git%3Ba=commit%3Bh=243d12fdec66a4360fbb3e307a046b39b5b4ffc3 | x_refsource_CONFIRM | |
| http://www.openwall.com/lists/oss-security/2016/04/29/5 | mailing-listx_refsource_MLIST | |
| http://www.openwall.com/lists/oss-security/2016/04/29/8 | mailing-listx_refsource_MLIST | |
| http://www.openwall.com/lists/oss-security/2016/05/10/3 | mailing-listx_refsource_MLIST | |
| http://www.ubuntu.com/usn/USN-2982-1 | vendor-advisoryx_refsource_UBUNTU | |
| https://access.redhat.com/security/cve/CVE-2016-4356 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1211259 | Issue Tracking | |
| https://nvd.nist.gov/vuln/detail/CVE-2016-4356 | ||
| https://security.gentoo.org/glsa/201604-04 | vendor-advisoryx_refsource_GENTOO | |
| https://www.cve.org/CVERecord?id=CVE-2016-4356 |
Change history (0)
No recorded changes yet.