4.3

CVE-2013-1623: yassl cyassl Cryptographic Issues

Modified
Published 08-02-2013Last modified 06-08-2024

Vulnerability summary

CVE-2013-1623 is a medium (CVSS 4.3) Cryptographic Issues vulnerability in yassl cyassl. EPSS estimates a 2.42% chance of exploitation in the next 30 days, higher than 84.2% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 4.3, network access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
4.3/10
010
Medium · v2.0 (NVD)
EPSS score
2.42%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 1
DSA-2780-1

Timeline

  1. 08-02-2013
    PublishedVulnerability first disclosed.
  2. 06-08-2024
    Last modifiedVulnerability information updated.

Description

The TLS and DTLS implementations in wolfSSL CyaSSL before 2.5.0 do 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.

CVSS metrics

1 score · 1 source · 1 version

EPSS trend

Probability

2.42%

Chance of exploitation in the next 30 days

Percentile

84%

Versus all other CVEs

30-day change

No change 0.00 pp

From 2.42% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication (CVSS vector). Other conditions: not stated in public data.

Yassl1 product
  • cyassl≤ 2.4.6 | 0.2.0 | 0.3.0 | 0.4.0 | 0.5.0 | 0.5.5 | 0.6.0 | 0.6.2 | 0.6.3 | 0.8.0 | 0.9.0 | 0.9.6 | 0.9.8 | 0.9.9 | 1.0.0:rc1 | 1.0.0:rc2 | 1.0.0:rc3 | 1.0.2 | 1.0.3 | 1.0.6 | 1.1.0 | 1.2.0 | 1.3.0 | 1.4.0 | 1.5.0 | 1.5.4 | 1.5.6 | 1.6.0 | 1.6.5 | 1.8.0 | 1.9.0 | 2.0.0:rc1 | 2.0.0:rc2 | 2.0.0:rc3 | 2.0.2 | 2.0.6 | 2.0.8 | 2.2.0 | 2.3.0 | 2.4.0

1 vendor · 1 product

References

5 links