Description
Stack-based buffer overflow in the MHD_digest_auth_check function in libmicrohttpd before 0.9.32, when MHD_OPTION_CONNECTION_MEMORY_LIMIT is set to a large value, allows remote attackers to cause a denial of service (crash) or possibly execute arbitrary code via a long URI in an authentication header.
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 | libmicrohttpd | 0.9.32-1 | — |
| Debian 13 | libmicrohttpd | 0.9.32-1 | — |
| Debian 12 | libmicrohttpd | 0.9.32-1 | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP2 | libmicrohttpd | 0.9.30-5.1 | SUSE-SU-2017:1576-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP2 | libmicrohttpd | 0.9.30-5.1 | SUSE-SU-2017:1576-1 |
Advisories 1
- SUSE-SU-2017:1576-1 Security update for libmicrohttpd SUSE / openSUSE Security Updates · Feb 4, 2026
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1039390
- 64138 vdb-entry
- https://bugs.gentoo.org/show_bug.cgi?id=493450
- GLSA-201402-01 vendor-advisory
- https://gnunet.org/svn/libmicrohttpd/ChangeLog
- [oss-security] 20131209 Re: CVE request: two issues in libmicro mailing-list
- 55903 third-party-advisory