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CVE-2015-8313

20
FAUCET Score

CVE-2015-8313 describes a vulnerability in GnuTLS where the first byte of padding in CBC modes is incorrectly validated, affecting Debian Linux and GnuTLS products. This medium-severity vulnerability (CVSS 5.9) has a network attack vector and high attack complexity, potentially leading to high confidentiality impact without affecting integrity or availability. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 2.0.0, <= 2.12.24CPE matchmatch criteria
cpe:2.3:a:gnu:gnutls:*:*:*:*:*:*:*:*
7.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*
8.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
9.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
10.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.9MEDIUM

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
2.2
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.69%
Probability of exploitation in next 30 days
EPSS Percentile
74.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0169 is in the 52nd percentile among its peer group of 19,958 CVEs.

Social Chatter

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

Vendor Advisories (1)

redhatCVE-2015-8313Low

gnutls: First byte of the padding in CBC mode is not checked

Dec 1, 2015

References

blog.hboeck.de / archives/877-A-little-POODLE-left-in-GnuTLS-old-versions.html
Third Party Advisory
bugzilla.redhat.com / show_bug.cgi
Issue TrackingThird Party Advisory
bugzilla.suse.com / show_bug.cgi
Issue TrackingPatchThird Party Advisory
security-tracker.debian.org / tracker/CVE-2015-8313
Third Party Advisory
debian.org / security/2015/dsa-3408
Third Party Advisory
securityfocus.com / archive/1/537012/100/0/threaded
Third Party AdvisoryVDB Entry
securityfocus.com / bid/78327
Third Party AdvisoryVDB Entry