Bug 1699734
Summary: | CVE-2019-11072 lighttpd: signed integer overflow causing denial of service [epel-all] | ||
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Product: | [Fedora] Fedora EPEL | Reporter: | Dhananjay Arunesh <darunesh> |
Component: | lighttpd | Assignee: | Gwyn Ciesla <gwync> |
Status: | NEW --- | QA Contact: | Fedora Extras Quality Assurance <extras-qa> |
Severity: | medium | Docs Contact: | |
Priority: | medium | ||
Version: | epel7 | CC: | gs-fedoraproject.org, gs-redhat.com, gwync, matthias, rhbugs |
Target Milestone: | --- | Keywords: | Security, SecurityTracking |
Target Release: | --- | ||
Hardware: | Unspecified | ||
OS: | Unspecified | ||
Whiteboard: | |||
Fixed In Version: | Doc Type: | No Doc Update | |
Doc Text: | Story Points: | --- | |
Clone Of: | Environment: | ||
Last Closed: | Type: | --- | |
Regression: | --- | Mount Type: | --- |
Documentation: | --- | CRM: | |
Verified Versions: | Category: | --- | |
oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
Cloudforms Team: | --- | Target Upstream Version: | |
Embargoed: | |||
Bug Depends On: | |||
Bug Blocks: | 1699732 |
Description
Dhananjay Arunesh
2019-04-15 06:13:57 UTC
Use the following template to for the 'fedpkg update' request to submit an update for this issue as it contains the top-level parent bug(s) as well as this tracking bug. This will ensure that all associated bugs get updated when new packages are pushed to stable. ===== # bugfix, security, enhancement, newpackage (required) type=security # low, medium, high, urgent (required) severity=medium # testing, stable request=testing # Bug numbers: 1234,9876 bugs=1699732,1699734 # Description of your update notes=Security fix for [PUT CVEs HERE] # Enable request automation based on the stable/unstable karma thresholds autokarma=True stable_karma=3 unstable_karma=-3 # Automatically close bugs when this marked as stable close_bugs=True # Suggest that users restart after update suggest_reboot=False ====== Additionally, you may opt to use the bodhi web interface to submit updates: https://bodhi.fedoraproject.org/updates/new https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-11072 was disputed by a lighttpd developer (me), as the CVE was grossly written and poorly scoped. From the CVE: "NOTE: The developer states "The feature which can be abused to cause the crash is a new feature in lighttpd 1.4.50, and is not enabled by default. It must be explicitly configured in the config file (e.g. lighttpd.conf). Certain input will trigger an abort() in lighttpd when that feature is enabled. lighttpd detects the underflow or realloc() will fail (in both 32-bit and 64-bit executables), also detected in lighttpd. Either triggers an explicit abort() by lighttpd. This is not exploitable beyond triggering the explicit abort() with subsequent application exit." If RedHat/Fedora packages of lighttpd 1.4.50 - lighttpd 1.4.53 did not explicitly enable server.http-parseopts option "url-path-2f-decode" => "enable" in lighttpd.conf, then the CVE does not apply and this issue can be closed. Reference: https://redmine.lighttpd.net/issues/2945 The feature which can be abused to cause the crash is a new feature in lighttpd 1.4.50, and is not enabled by default. It must be explicitly configured in the config file (e.g. lighttpd.conf) with: server.http-parseopts = ( "url-path-2f-decode" => "enable" ) and can be disabled in the config file (or commented out) with: server.http-parseopts = ( "url-path-2f-decode" => "disable" ) losing only the functionality of that feature. The bug is fixed in lighttpd 1.4.54, and server.http-parseopts option "url-path-2f-decode" => "enable" becomes enabled by default in lighttpd 1.4.54, so please do not explicitly disable this feature in RedHat/Fedora packages from lighttpd 1.4.54 onwards. |