CVE-2013-1620

Network Security Services vulnerability

CVSS

4.3

EPSS

3.7%

EPSS pct

89th

Exploited

No known

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.

Affected vendor

Mozilla

Affected product

Network Security Services

CVSS vector

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

Weakness type (CWE)

CWE-203

Published

2013-02-08

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, medium attack complexity, requiring no authentication. Successful exploitation leads to partial impact to confidentiality.

Its EPSS score of 3.7% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 89% of all scored CVEs.

Check your external exposure to CVE-2013-1620

Confirm whether Mozilla Network Security Services is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2013-1620.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2013-1620

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2013-1620 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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