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Fencer Intel
medium 5.8

CVE-2013-1740 json

The ssl_Do1stHandshake function in sslsecur.c in libssl in Mozilla Network Security Services (NSS) before 3.15.4, when the TLS False Start…

published 12y ago modified 4mo ago also EUVD-2013-1767

cvss
5.8
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.7%
EPSS 1.7% chance of exploitation in 30 days, percentile 76%
public exploits
0
none known

Summary

The ssl_Do1stHandshake function in sslsecur.c in libssl in Mozilla Network Security Services (NSS) before 3.15.4, when the TLS False Start feature is enabled, allows man-in-the-middle attackers to spoof SSL servers by using an arbitrary X.509 certificate during certain handshake traffic.

Patch / fix

  • nss Debian 14, Debian 13, Debian 12 2:3.15.4-1

debian advisories DEBIAN-CVE-2013-1740

  • nss RHEL 6 3.16.1-4.el6_5
  • nspr RHEL 6 4.10.6-1.el6_5
  • nss-util RHEL 6 3.16.1-1.el6_5
  • nss-tools RHEL 6 3.16.1-4.el6_5
  • nss-sysinit RHEL 6 3.16.1-4.el6_5
  • nss RHEL 5 3.16.1-2.el5
  • nss-tools RHEL 5 3.16.1-2.el5

red hat advisories RHSA-2014:0917RHSA-2014:1246

  • mozilla-nss openSUSE Tumbleweed 3.26.2-1.1

opensuse advisories openSUSE-SU-2024:10451-1

Is CVE-2013-1740 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2013-1740 updated cvss 4.3

nss: false start PR_Recv information disclosure security issue

  • Red Hat Enterprise Linux (v. 5 server) nss 3.16.1-2.el5, nss-tools 3.16.1-2.el5 Red Hat Enterprise Linux Desktop (v. 5 client) nss 3.16.1-2.el5, nss-tools 3.16.1-2.el5
    fixed: vendor fix RHSA-2014:1246
  • Red Hat Enterprise Linux Desktop (v. 6) nss 3.16.1-4.el6_5, nspr 4.10.6-1.el6_5, nss-util 3.16.1-1.el6_5, nss-tools 3.16.1-4.el6_5, nss-sysinit 3.16.1-4.el6_5 Red Hat Enterprise Linux Desktop Optional (v. 6) nss 3.16.1-4.el6_5, nspr 4.10.6-1.el6_5, nss-util 3.16.1-1.el6_5
    fixed: vendor fix RHSA-2014:0917
  • Red Hat Enterprise Linux Desktop Workstation (v. 5 client) nss 3.16.1-2.el5
    fixed: vendor fix RHSA-2014:1246
  • Red Hat Enterprise Linux HPC Node (v. 6) nss 3.16.1-4.el6_5, nspr 4.10.6-1.el6_5, nss-util 3.16.1-1.el6_5, nss-tools 3.16.1-4.el6_5, nss-sysinit 3.16.1-4.el6_5 Red Hat Enterprise Linux HPC Node Optional (v. 6) nss 3.16.1-4.el6_5, nspr 4.10.6-1.el6_5, nss-util 3.16.1-1.el6_5 Red Hat Enterprise Linux Server (v. 6) nss 3.16.1-4.el6_5, nspr 4.10.6-1.el6_5, nss-util 3.16.1-1.el6_5, nss-tools 3.16.1-4.el6_5, nss-sysinit 3.16.1-4.el6_5 Red Hat Enterprise Linux Server Optional (v. 6) nss 3.16.1-4.el6_5 Red Hat Enterprise Linux Workstation (v. 6) nss 3.16.1-4.el6_5, nspr 4.10.6-1.el6_5, nss-util 3.16.1-1.el6_5, nss-tools 3.16.1-4.el6_5, nss-sysinit 3.16.1-4.el6_5 Red Hat Enterprise Linux Workstation Optional (v. 6) nss 3.16.1-4.el6_5
    fixed: vendor fix RHSA-2014:0917
  • Red Hat Enterprise Linux 7 nss, nss-tools, nss-sysinit
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.66% chance of exploitation in the next 30 days, higher than 76% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • bugzilla.mozilla.org https://bugzilla.mozilla.org/show_bug.cgi?id=919877 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 5.8 AV:N/AC:M/Au:N/C:P/I:P/A:N

Classification

Weakness

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.