Description
The Poco::Net::X509Certificate::verify method in the NetSSL library in POCO C++ Libraries before 1.4.6p4 allows man-in-the-middle attackers to spoof SSL servers via crafted DNS PTR records that are requested during comparison of a server name to a wildcard domain name in an X.509 certificate.
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 14 | poco | 1.3.6p1-5 | — |
| Debian 13 | poco | 1.3.6p1-5 | — |
| Debian 12 | poco | 1.3.6p1-5 | — |
| Debian 7 | poco | 1.3.6p1-4+deb7u1 | DLA-1239-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | poco | 1.3.6p1-4+deb7u1build1 | — |
Advisories 1
- DLA-1239-1 poco - security update Debian Security (DSA / DLA) · Mar 9, 2026
References
- FEDORA-2016-4a3e5618eb vendor-advisory
- VU#118748 third-party-advisory
- https://raw.githubusercontent.com/pocoproject/poco/poco-1.4.6p4-release/CHANGELOG
- FEDORA-2016-0b3a611401 vendor-advisory