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CVE-2017-5462

16
FAUCET Score

CVE-2017-5462 describes a flaw in the Network Security Services (NSS) library's DRBG number generation, specifically an issue where the internal state V did not correctly carry bits over. This vulnerability impacts Mozilla Firefox, Firefox ESR, and Thunderbird versions prior to their respective patched releases (e.g., Firefox < 53, Firefox ESR < 52.1, Thunderbird < 52.1), as well as Debian distributions utilizing these affected NSS versions. With a CVSSv3 score of 5.3 (Medium), this vulnerability has a network attack vector and low attack complexity, requiring no user interaction. While the potential impact is limited to a low integrity impact (I:L), there is no confidentiality or availability impact. Currently, there is no evidence of active exploitation, nor is public exploit code available (e.g., Metasploit, ExploitDB). Community discussion and media coverage for this CVE are minimal, indicating a low level of public attention.

Impacted Technologies

VendorProductVersion(s)CPE
8.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
< 45.9.0CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
< 53.0CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
52.0CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:52.0:*:*:*:*:*:*:*
< 3.28.4CPE matchmatch criteria
cpe:2.3:a:mozilla:network_security_services:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

5.3MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
1.4
CvssVersion
3.0

Exploit Intelligence

EPSS Score
2.64%
Probability of exploitation in next 30 days
EPSS Percentile
84.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0264 is in the 76th percentile among its peer group of 23,705 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, 0.1 Bluesky, 0.0 Mastodon, and 0.4 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 Patches (1)

mozillavendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

redhatCVE-2017-5462Moderate

nss: DRBG flaw in NSS

Apr 19, 2017

References

bugzilla.mozilla.org / show_bug.cgi
Issue Tracking
security.gentoo.org / glsa/201705-04
Third Party Advisory
debian.org / security/2017/dsa-3831
Third Party Advisory
debian.org / security/2017/dsa-3872
Third Party Advisory
mozilla.org / security/advisories/mfsa2017-10
Vendor Advisory
mozilla.org / security/advisories/mfsa2017-11
Vendor Advisory
mozilla.org / security/advisories/mfsa2017-12
Vendor Advisory
mozilla.org / security/advisories/mfsa2017-13
Vendor Advisory
securityfocus.com / bid/97940
Third Party AdvisoryVDB Entry
securitytracker.com / id/1038320
Third Party AdvisoryVDB Entry