Security update for curl SUSE Patch security@suse.de SUSE Security Team SUSE-SU-2017:2789-1 Final 1 1 2017-10-19T13:20:38Z current 2017-10-19T13:20:38Z 2017-10-19T13:20:38Z cve-database/bin/generate-cvrf.pl 2017-02-24T01:00:00Z Security update for curl This update for curl fixes the following security issues: - CVE-2017-1000254: FTP PWD response parser out of bounds read (bsc#1061876) The CVRF data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0). slestso13-curl-13319 Copyright SUSE LLC under the Creative Commons License 4.0 with Attribution (CC-BY-4.0) https://www.suse.com/support/update/announcement/2017/suse-su-20172789-1/ Link for SUSE-SU-2017:2789-1 https://lists.suse.com/pipermail/sle-security-updates/2017-October/003326.html E-Mail link for SUSE-SU-2017:2789-1 https://www.suse.com/support/security/rating/ SUSE Security Ratings https://bugzilla.suse.com/1061876 SUSE Bug 1061876 https://www.suse.com/security/cve/CVE-2017-1000254/ SUSE CVE CVE-2017-1000254 page SUSE Studio Onsite 1.3 libcurl-devel-7.19.7-1.20.53.6.1 libcurl-devel-7.19.7-1.20.53.6.1 as a component of SUSE Studio Onsite 1.3 libcurl may read outside of a heap allocated buffer when doing FTP. When libcurl connects to an FTP server and successfully logs in (anonymous or not), it asks the server for the current directory with the `PWD` command. The server then responds with a 257 response containing the path, inside double quotes. The returned path name is then kept by libcurl for subsequent uses. Due to a flaw in the string parser for this directory name, a directory name passed like this but without a closing double quote would lead to libcurl not adding a trailing NUL byte to the buffer holding the name. When libcurl would then later access the string, it could read beyond the allocated heap buffer and crash or wrongly access data beyond the buffer, thinking it was part of the path. A malicious server could abuse this fact and effectively prevent libcurl-based clients to work with it - the PWD command is always issued on new FTP connections and the mistake has a high chance of causing a segfault. The simple fact that this has issue remained undiscovered for this long could suggest that malformed PWD responses are rare in benign servers. We are not aware of any exploit of this flaw. This bug was introduced in commit [415d2e7cb7](https://github.com/curl/curl/commit/415d2e7cb7), March 2005. In libcurl version 7.56.0, the parser always zero terminates the string but also rejects it if not terminated properly with a final double quote. CVE-2017-1000254 SUSE Studio Onsite 1.3:libcurl-devel-7.19.7-1.20.53.6.1 moderate 2.6 AV:N/AC:H/Au:N/C:N/I:N/A:P To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". https://www.suse.com/support/update/announcement/2017/suse-su-20172789-1/ https://www.suse.com/security/cve/CVE-2017-1000254.html CVE-2017-1000254 https://bugzilla.suse.com/1061876 SUSE Bug 1061876