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Vulnerability record · CVE-2013-1620 · published 8 February 2013

CVE-2013-1620: Mozilla network security services observable discrepancy vulnerability

Mozilla · Network Security Services

The TLS implementation in Mozilla Network Security Services (NSS) does not properly consider timing side-channel attacks on a noncompliant MAC check operation during the processing of malformed CBC padding, which allows remote attackers to conduct distinguishing attacks and plaintext-recovery attacks via statistical analysis of timing data for crafted packets, a related issue to CVE-2013-0169.

4.3 CVSS 2.0 Medium EPSS 3.7% · top 10.6% CWE-203 · Observable discrepancy
4.3CVSS 2.0 base score
3.7%EPSS exploitation probability, 30 days
NoNot in CISA KEV
15Affected product versions listed by NVD
38References
16 Jun 2026Last modified by NVD

Description

The TLS implementation in Mozilla Network Security Services (NSS) does not properly consider timing side-channel attacks on a noncompliant MAC check operation during the processing of malformed CBC padding, which allows remote attackers to conduct distinguishing attacks and plaintext-recovery attacks via statistical analysis of timing data for crafted packets, a related issue to CVE-2013-0169.

AV:N/AC:M/Au:N/C:P/I:N/A:N

Affected products

15 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10761 Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2013-04/msg00009.html Broken Link
http://lists.opensuse.org/opensuse-security-announce/2013-04/msg00010.html Broken Link
http://openwall.com/lists/oss-security/2013/02/05/24 Mailing ListThird Party Advisory
http://rhn.redhat.com/errata/RHSA-2013-1135.html Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2013-1144.html Third Party Advisory
http://seclists.org/fulldisclosure/2014/Dec/23 Mailing ListThird Party Advisory
http://security.gentoo.org/glsa/glsa-201406-19.xml Third Party Advisory
http://www.isg.rhul.ac.uk/tls/TLStiming.pdf Technical DescriptionThird Party Advisory
http://www.oracle.com/technetwork/topics/security/cpuapr2014-1972952.html Third Party Advisory
http://www.oracle.com/technetwork/topics/security/cpujan2014-1972949.html Third Party Advisory
http://www.oracle.com/technetwork/topics/security/cpujan2015-1972971.html Third Party Advisory
http://www.oracle.com/technetwork/topics/security/cpujul2014-1972956.html Third Party Advisory
http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html Third Party Advisory
http://www.securityfocus.com/archive/1/534161/100/0/threaded Third Party AdvisoryVDB Entry
http://www.securityfocus.com/bid/57777 Third Party AdvisoryVDB Entry
http://www.securityfocus.com/bid/64758 Third Party AdvisoryVDB Entry
http://www.ubuntu.com/usn/USN-1763-1 Third Party Advisory
http://www.vmware.com/security/advisories/VMSA-2014-0012.html Third Party Advisory
http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10761 Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2013-04/msg00009.html Broken Link
http://lists.opensuse.org/opensuse-security-announce/2013-04/msg00010.html Broken Link
http://openwall.com/lists/oss-security/2013/02/05/24 Mailing ListThird Party Advisory
http://rhn.redhat.com/errata/RHSA-2013-1135.html Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2013-1144.html Third Party Advisory
http://seclists.org/fulldisclosure/2014/Dec/23 Mailing ListThird Party Advisory
http://security.gentoo.org/glsa/glsa-201406-19.xml Third Party Advisory
http://www.isg.rhul.ac.uk/tls/TLStiming.pdf Technical DescriptionThird Party Advisory
http://www.oracle.com/technetwork/topics/security/cpuapr2014-1972952.html Third Party Advisory
http://www.oracle.com/technetwork/topics/security/cpujan2014-1972949.html Third Party Advisory
http://www.oracle.com/technetwork/topics/security/cpujan2015-1972971.html Third Party Advisory
http://www.oracle.com/technetwork/topics/security/cpujul2014-1972956.html Third Party Advisory
http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html Third Party Advisory
http://www.securityfocus.com/archive/1/534161/100/0/threaded Third Party AdvisoryVDB Entry
http://www.securityfocus.com/bid/57777 Third Party AdvisoryVDB Entry
http://www.securityfocus.com/bid/64758 Third Party AdvisoryVDB Entry
http://www.ubuntu.com/usn/USN-1763-1 Third Party Advisory
http://www.vmware.com/security/advisories/VMSA-2014-0012.html Third Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2013-1620), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.