1. Gentoo Linux Security Advisory
| Advisory Reference | GLSA 200512-09 / cURL |
| Release Date | December 16, 2005 |
| Latest Revision | December 16, 2005: 01 |
| Impact | low |
| Exploitable | local |
| Package | Vulnerable versions | Unaffected versions | Architecture(s) |
| net-misc/curl | < 7.15.1 | >= 7.15.1 | All supported architectures |
Related bugreports: #114710
cURL is vulnerable to local arbitrary code execution via buffer overflow due to the insecure parsing of URLs.
cURL is a command line tool for transferring files with URL syntax, supporting numerous protocols.
Stefan Esser from the Hardened-PHP Project has reported a vulnerability in cURL that allows for a local buffer overflow when cURL attempts to parse specially crafted URLs. The URL can be specially crafted in one of two ways: the URL could be malformed in a way that prevents a terminating null byte from being added to either a hostname or path buffer; or the URL could contain a "?" separator in the hostname portion, which causes a "/" to be prepended to the resulting string.
An attacker capable of getting cURL to parse a maliciously crafted URL could cause a denial of service or execute arbitrary code with the privileges of the user making the call to cURL. An attacker could also escape open_basedir or safe_mode pseudo-restrictions when exploiting this problem from within a PHP program when PHP is compiled with libcurl.
There is no known workaround at this time.
All cURL users should upgrade to the latest version:
Code Listing 3.1: Resolution |
# emerge --sync # emerge --ask --oneshot --verbose ">=net-misc/curl-7.15.1" |