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CVE-2016-4353

25
FAUCET Score

CVE-2016-4353 describes a denial-of-service vulnerability in Libksba versions prior to 1.3.3, affecting products like Canonical Ubuntu Linux and GnuPG Libksba. This flaw, rated High severity (CVSS 7.5), stems from improper handling of decoder stack overflows in ber-decoder.c, allowing remote attackers to crash the application via crafted BER data. The attack requires no user interaction or privileges, but its impact is limited to availability. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.3.2CPE matchmatch criteria
cpe:2.3:a:gnupg:libksba:*:*:*:*:*:*:*:*
12.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:lts:*:*:*
14.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
2.15%
Probability of exploitation in next 30 days
EPSS Percentile
80.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0215 is in the 65th percentile among its peer group of 51,485 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (3)

redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: libksba
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: libksba
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: libksba

Vendor Advisories (1)

redhatCVE-2016-4353Low

libksba: denial of service due to stack overflow in src/ber-decoder.c (push_decoder_state, pop_decoder_state)

Apr 8, 2015

References

git.gnupg.org / cgi-bin/gitweb.cgi
security.gentoo.org / glsa/201604-04
openwall.com / lists/oss-security/2016/04/29/5
openwall.com / lists/oss-security/2016/04/29/8
ubuntu.com / usn/USN-2982-1