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.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 6.0 | mysql-5.1 | 5.1.72-2 | DSA-2780-1 |
Advisories 1
- DSA-2780-1 mysql-5.1 - several Debian Security (DSA / DLA) · Mar 9, 2026
References
- http://www.isg.rhul.ac.uk/tls/TLStiming.pdf
- [oss-security] 20130205 Re: CVE request: TLS CBC padding timing flaw in various SSL / TLS implementations mailing-list
- 53372 third-party-advisory
- GLSA-201308-06 vendor-advisory
- http://www.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