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CVE-2017-7502

26
FAUCET Score

CVE-2017-7502 is a null pointer dereference vulnerability affecting Mozilla Network Security Services (NSS) versions 3.24.0 and later. A remote attacker can exploit this by sending empty SSLv2 messages, leading to a denial of service. With a CVSS score of 7.5 (HIGH), this vulnerability is easily exploitable over the network with low attack complexity and no user interaction, resulting in high availability impact. There is currently no known active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
3.24.0CPE matchmatch criteria
cpe:2.3:a:mozilla:network_security_services:3.24.0:*:*:*:*:*:*:*
3.25.0CPE matchmatch criteria
cpe:2.3:a:mozilla:network_security_services:3.25.0:*:*:*:*:*:*:*
3.25.1CPE matchmatch criteria
cpe:2.3:a:mozilla:network_security_services:3.25.1:*:*:*:*:*:*:*
3.26.0CPE matchmatch criteria
cpe:2.3:a:mozilla:network_security_services:3.26.0:*:*:*:*:*:*:*
3.26.2CPE matchmatch criteria
cpe:2.3:a:mozilla:network_security_services:3.26.2:*:*:*:*:*:*:*

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
4.30%
Probability of exploitation in next 30 days
EPSS Percentile
90.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0430 is in the 83rd percentile among its peer group of 51,506 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

Patch Available

Vendor Patches (4)

redhatpatch availablevia redhat_api
Product: Red Hat Container Development Kit 3.0
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: nss-0:3.28.4-3.el6_9
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: nss-0:3.28.4-1.2.el7_3
View patch
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: nss

Vendor Advisories (1)

redhatCVE-2017-7502Important

nss: Null pointer dereference when handling empty SSLv2 messages

May 30, 2017

References

access.redhat.com / errata/RHSA-2017:1364
access.redhat.com / errata/RHSA-2017:1365
access.redhat.com / errata/RHSA-2017:1567
access.redhat.com / errata/RHSA-2017:1712
hg.mozilla.org / projects/nss/rev/55ea60effd0d
Patch
debian.org / security/2017/dsa-3872
oracle.com / technetwork/security-advisory/cpuoct2017-3236626.html
securityfocus.com / bid/98744
Third Party AdvisoryVDB Entry
securitytracker.com / id/1038579