Description
Multiple off-by-one errors in the cURL library (libcurl) 7.11.2 through 7.15.0 allow local users to trigger a buffer overflow and cause a denial of service or bypass PHP security restrictions via certain URLs that (1) are malformed in a way that prevents a terminating null byte from being added to either a hostname or path buffer, or (2) contain a "?" separator in the hostname portion, which causes a "/" to be prepended to the resulting string.
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 ↗Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 4 | curl +1 | 7.12.1-8.rhel4 | RHSA-2005:875 |
Advisories 2
- RHSA-2005:875 Red Hat Security Advisory: curl security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- DSA-919-2 curl - buffer overflow Debian Security (DSA / DLA) · Mar 9, 2026
References
- 17951 vdb-entry
- GLSA-200603-25 vendor-advisory
- ADV-2006-1779 vdb-entry
- TA06-132A third-party-advisory
- ADV-2005-2791 vdb-entry
- ADV-2006-0960 vdb-entry
- DSA-919 vendor-advisory
- 19433 third-party-advisory
- FEDORA-2005-1129 vendor-advisory
- RHSA-2005:875 vendor-advisory
- 20051207 Advisory 24/2005: libcurl URL parsing vulnerability mailing-list
- http://www.hardened-php.net/advisory_242005.109.html
- oval:org.mitre.oval:def:10855 vdb-entry signature
- ADV-2008-0924 vdb-entry
- USN-228-1 vendor-advisory
- 17977 third-party-advisory
- http://curl.haxx.se/docs/adv_20051207.html
- 18105 third-party-advisory
- 15756 vdb-entry
- APPLE-SA-2006-05-11 vendor-advisory
- APPLE-SA-2008-03-18 vendor-advisory
- 18336 third-party-advisory
- 19261 third-party-advisory
- GLSA-200512-09 vendor-advisory
- TSLSA-2005-0072 vendor-advisory
- 17965 third-party-advisory
- http://qa.openoffice.org/issues/show_bug.cgi?id=59032
- 19457 third-party-advisory
- http://docs.info.apple.com/article.html?artnum=307562
- 17960 third-party-advisory
- MDKSA-2005:224 vendor-advisory
- 17907 third-party-advisory
- 20077 third-party-advisory
- 18188 third-party-advisory
- 17961 third-party-advisory