Tor before 0.2.8.12 might allow remote attackers to cause a denial of service (client crash) via a crafted hidden service descriptor.

Security fix for CVE-2016-1254

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website.
Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

This update for tor fixes the following issues :

  - a hostile hidden service could cause tor clients to     crash (boo#1016343, CVE-2016-1254)

This update for tor updates to version 0.2.8.12 and fixes the following issues :

  - a hostile hidden service could cause tor clients to     crash (boo#1016343, CVE-2016-1254)

  - updated fallback directory list

  - updated geoip and geoip6 to the December 7 2016 Maxmind     GeoLite2 Country database.

  - When Tor leaves standby because of a new application     request, open circuits as needed to serve that request

  - Clients now respond to new application stream requests     immediately when they arrive, rather than waiting up to     one second before starting to handle them

It was discovered that Tor, a connection-based low-latency anonymous communication system, may read one byte past a buffer when parsing hidden service descriptors. This issue may enable a hostile hidden service to crash Tor clients depending on hardening options and malloc implementation.

It was discovered that Tor, a connection-based low-latency anonymous communication system, may read one byte past a buffer when parsing hidden service descriptors. This issue may enable a hostile hidden service to crash Tor clients depending on hardening options and malloc implementation.

For Debian 7 'Wheezy', these problems have been fixed in version 0.2.4.27-3.

We recommend that you upgrade your tor packages.

NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

ID	Name	Product	Family	Severity
96212	Fedora 25 : tor (2016-95b4e9077e)	Nessus	Fedora Local Security Checks	high
96207	Fedora 24 : tor (2016-76b646637e)	Nessus	Fedora Local Security Checks	high
96175	openSUSE Security Update : tor (openSUSE-2016-1527)	Nessus	SuSE Local Security Checks	high
96174	openSUSE Security Update : tor (openSUSE-2016-1526)	Nessus	SuSE Local Security Checks	high
95956	Debian DSA-3741-1 : tor - security update	Nessus	Debian Local Security Checks	high
95954	Debian DLA-754-1 : tor security update	Nessus	Debian Local Security Checks	high

Detections

Analytics

CVE-2016-1254

high

Tenable Plugins

high

high

high

high

high

high