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CVE-2013-4351

17
FAUCET Score

CVE-2013-4351 describes a vulnerability in GnuPG versions 1.4.x, 2.0.x, and 2.1.x where a key flags subpacket with all bits cleared is misinterpreted as having all bits set. This flaw could allow remote attackers to bypass intended cryptographic protections by manipulating subkey usage. With a CVSS score of 5.8, this vulnerability has a medium attack complexity and could lead to partial confidentiality and integrity impacts. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
1.4.0CPE matchmatch criteria
cpe:2.3:a:gnupg:gnupg:1.4.0:*:*:*:*:*:*:*
1.4.2CPE matchmatch criteria
cpe:2.3:a:gnupg:gnupg:1.4.2:*:*:*:*:*:*:*
1.4.3CPE matchmatch criteria
cpe:2.3:a:gnupg:gnupg:1.4.3:*:*:*:*:*:*:*
1.4.4CPE matchmatch criteria
cpe:2.3:a:gnupg:gnupg:1.4.4:*:*:*:*:*:*:*
1.4.5CPE matchmatch criteria
cpe:2.3:a:gnupg:gnupg:1.4.5:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.8MEDIUM

AV:N/AC:M/Au:N/C:P/I:P/A:N

Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
NONE
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
4.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
2.52%
Probability of exploitation in next 30 days
EPSS Percentile
83.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0252 is in the 74th percentile among its peer group of 19,958 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

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

Remediation

Patch Available

Vendor Patches (3)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: gnupg-0:1.4.5-18.el5_10
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: gnupg2-0:2.0.10-6.el5_10
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: gnupg2-0:2.0.14-6.el6_4
View patch

Vendor Advisories (1)

redhatCVE-2013-4351Low

gnupg: treats no-usage-permitted keys as all-usages-permitted

Mar 12, 2013

References

lists.opensuse.org / opensuse-updates/2013-10/msg00003.html
lists.opensuse.org / opensuse-updates/2013-10/msg00006.html
rhn.redhat.com / errata/RHSA-2013-1459.html
bugzilla.redhat.com / show_bug.cgi
thread.gmane.org / gmane.comp.encryption.gpg.devel/17712/focus=18138
ubuntu.com / usn/usn-1987-1
debian.org / security/2013/dsa-2773
debian.org / security/2013/dsa-2774
openwall.com / lists/oss-security/2013/09/13/4