Predictive Vulnerability Intelligence.

Product

  • Product
  • Pricing
  • Documentation

Company

  • About
  • Partnerships
  • Blog
  • Support

Legal

  • Terms
  • Privacy
  • Data Licensing

© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2013-1740

17
FAUCET Score

CVE-2013-1740 describes a vulnerability in Mozilla Network Security Services (NSS) versions prior to 3.15.4, specifically within the ssl_Do1stHandshake function. When the TLS False Start feature is enabled, this flaw allows man-in-the-middle attackers to spoof SSL servers using an arbitrary X.509 certificate during specific handshake traffic. Rated with a CVSS score of 5.8, it has a network attack vector and medium attack complexity, potentially leading to partial confidentiality and integrity compromise. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
<= 3.15.3CPE matchmatch criteria
cpe:2.3:a:mozilla:network_security_services:*:*:*:*:*:*:*:*
3.2CPE matchmatch criteria
cpe:2.3:a:mozilla:network_security_services:3.2:*:*:*:*:*:*:*
3.2.1CPE matchmatch criteria
cpe:2.3:a:mozilla:network_security_services:3.2.1:*:*:*:*:*:*:*
3.3CPE matchmatch criteria
cpe:2.3:a:mozilla:network_security_services:3.3:*:*:*:*:*:*:*
3.3.1CPE matchmatch criteria
cpe:2.3:a:mozilla:network_security_services:3.3.1:*:*:*:*:*:*:*

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
1.93%
Probability of exploitation in next 30 days
EPSS Percentile
77.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0193 is in the 61st 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 (4)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: nss-0:3.16.1-2.el5
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: nspr-0:4.10.6-1.el6_5
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: nss-0:3.16.1-4.el6_5
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: nss-util-0:3.16.1-1.el6_5
View patch

Vendor Advisories (1)

redhatCVE-2013-1740Moderate

nss: false start PR_Recv information disclosure security issue

Jan 5, 2014

References

lists.opensuse.org / opensuse-security-announce/2014-02/msg00004.html
lists.opensuse.org / opensuse-security-announce/2014-02/msg00005.html
bugs.gentoo.org / show_bug.cgi
bugzilla.mozilla.org / show_bug.cgi
Exploit
bugzilla.redhat.com / show_bug.cgi
developer.mozilla.org / docs/NSS/NSS_3.15.4_release_notes
seclists.org / fulldisclosure/2014/Dec/23
exchange.xforce.ibmcloud.com / vulnerabilities/90394
oracle.com / technetwork/topics/security/cpujan2015-1972971.html
oracle.com / technetwork/topics/security/cpujan2016-2367955.html
oracle.com / technetwork/topics/security/cpujul2014-1972956.html
oracle.com / technetwork/topics/security/cpuoct2014-1972960.html
oracle.com / technetwork/topics/security/ovmbulletinjul2016-3090546.html
securityfocus.com / archive/1/534161/100/0/threaded
securityfocus.com / bid/64944
ubuntu.com / usn/USN-2088-1
vmware.com / security/advisories/VMSA-2014-0012.html