CVE-2013-1623
The TLS and DTLS implementations in wolfSSL CyaSSL before 2.5.0 do not properly consider timing...
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.
Exploit likelihood
What each source reports
NVD Score used
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.
- Record
CVE-2013-1623- CVSS 2.0
- 4.3 Medium
AV:N/AC:M/Au:N/C:P/I:N/A:N - Weakness
- CWE-310
- Updated
- 2026-11-02
CVE List No score
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.
- Record
CVE-2013-1623- Updated
- 2026-11-02
EUVDEUVD-2013-1658 No score
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.
- Record
EUVD-2013-1658- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-5g8p-qpcj-85w5 No score
The TLS and DTLS implementations in wolfSSL CyaSSL before 2.5.0 do not properly consider timing...
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.
- Record
GHSA-5g8p-qpcj-85w5- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
mysql-5.1Debian:6.0 From an advisory covering 32 CVEs |
before 5.1.72-2, plus listed versions 5.1.49-35.1.50-15.1.51-15.1.53-15.1.54-1 Show 18 moreShow less5.1.54-25.1.55-15.1.56-15.1.57-15.1.57-1.15.1.57-1.25.1.57-1.35.1.57-25.1.57-35.1.57-3.15.1.58-15.1.61-0+squeeze15.1.61-25.1.61-35.1.62-15.1.62-1+m68k5.1.63-0+squeeze15.1.66-0+squeeze1 |
5.1.72-2 |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | ||
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2013-1623 is a medium vulnerability (CVSS 4.3) in Yassl Cyassl, published February 8, 2013. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.42%, the 84th percentile. No source names a fixed version.
References
isg.rhul.ac.uk/tls/TLStiming.pdf
openwall.com/lists/oss-security/2013/02/05/24
secunia.com/advisories/53372
security.gentoo.org/glsa/glsa-201308-06.xml
yassl.com/yaSSL/Blog/Entries/2013/2/5_WolfSSL%2C_provider_of_CyaSSL_Embedded_SSL%2C_releases_first_embedded_TLS_and_DTLS_protocol_fix_for_Lucky_Thirteen_Attack.html
nvd.nist.gov/vuln/detail/CVE-2013-1623
github.com/advisories/GHSA-5g8p-qpcj-85w5