CVE-2016-4574
First published: Mon Jun 13 2016(Updated: )
Off-by-one error in the append_utf8_value function in the DN decoder (dn.c) in Libksba before 1.3.4 allows remote attackers to cause a denial of service (out-of-bounds read) via invalid utf-8 encoded data. NOTE: this vulnerability exists because of an incomplete fix for CVE-2016-4356.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| GnuPG Libksba | <=1.3.3 | |
| Ubuntu Linux | =12.04 | |
| Ubuntu Linux | =14.04 | |
| Ubuntu Linux | =15.10 | |
| Ubuntu Linux | =16.04 | |
| openSUSE | =42.1 | |
| openSUSE | =13.2 |
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Reference Links
- http://git.gnupg.org/cgi-bin/gitweb.cgi?p=libksba.git;a=commit;h=6be61daac047d8e6aa941eb103f8e71a1d4e3c75
- http://lists.opensuse.org/opensuse-updates/2016-05/msg00087.html
- http://lists.opensuse.org/opensuse-updates/2016-06/msg00028.html
- http://www.openwall.com/lists/oss-security/2016/05/10/3
- http://www.openwall.com/lists/oss-security/2016/05/10/4
- http://www.ubuntu.com/usn/USN-2982-1
- http://git.gnupg.org/cgi-bin/gitweb.cgi?p=libksba.git%3Ba=commit%3Bh=6be61daac047d8e6aa941eb103f8e71a1d4e3c75
Frequently Asked Questions
What is the severity of CVE-2016-4574?
CVE-2016-4574 is considered to have a medium severity rating due to its potential to cause denial of service.
How do I fix CVE-2016-4574?
To fix CVE-2016-4574, update Libksba to version 1.3.4 or later.
Which software versions are affected by CVE-2016-4574?
Affected software versions for CVE-2016-4574 include Libksba versions prior to 1.3.4 and specific versions of Ubuntu and openSUSE.
What type of vulnerability is CVE-2016-4574?
CVE-2016-4574 is an off-by-one error that leads to an out-of-bounds read.
Can CVE-2016-4574 be exploited remotely?
Yes, CVE-2016-4574 can be exploited remotely by attackers using invalid UTF-8 encoded data.
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- vendor/gnupg
- canonical/gnupg libksba
- version/gnupg libksba/1.3.3
- vendor/canonical
- canonical/ubuntu linux
- version/ubuntu linux/12.04
- version/ubuntu linux/14.04
- version/ubuntu linux/15.10
- version/ubuntu linux/16.04
- vendor/opensuse
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- version/opensuse/42.1
- version/opensuse/13.2