Bug 1520861 (CVE-2017-8819, CVE-2017-8820, CVE-2017-8821, CVE-2017-8822, CVE-2017-8823) - CVE-2017-8820 CVE-2017-8821 CVE-2017-8822 CVE-2017-8819 CVE-2017-8823 tor: Multiple vulnerabilities
Summary: CVE-2017-8820 CVE-2017-8821 CVE-2017-8822 CVE-2017-8819 CVE-2017-8823 tor: Mu...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2017-8819, CVE-2017-8820, CVE-2017-8821, CVE-2017-8822, CVE-2017-8823
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1520864
Blocks:
TreeView+ depends on / blocked
 
Reported: 2017-12-05 10:20 UTC by Andrej Nemec
Modified: 2021-10-21 11:57 UTC (History)
4 users (show)

Fixed In Version: tor 0.2.5.16, tor 0.2.8.17, tor 0.2.9.14, tor 0.3.0.13, tor 0.3.1.9
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Clone Of:
Environment:
Last Closed: 2021-10-21 11:57:45 UTC


Attachments (Terms of Use)

Description Andrej Nemec 2017-12-05 10:20:55 UTC
CVE-2017-8819

In Tor before 0.2.5.16, 0.2.6 through 0.2.8 before 0.2.8.17, 0.2.9 before 0.2.9.14, 0.3.0 before 0.3.0.13, and 0.3.1 before 0.3.1.9, the replay-cache protection mechanism is ineffective for v2 onion services, aka TROVE-2017-009. An attacker can send many INTRODUCE2 cells to trigger this issue.

CVE-2017-8820

In Tor before 0.2.5.16, 0.2.6 through 0.2.8 before 0.2.8.17, 0.2.9 before 0.2.9.14, 0.3.0 before 0.3.0.13, and 0.3.1 before 0.3.1.9, remote attackers can cause a denial of service (NULL pointer dereference and application crash) against directory authorities via a malformed descriptor, aka TROVE-2017-010.

CVE-2017-8821

In Tor before 0.2.5.16, 0.2.6 through 0.2.8 before 0.2.8.17, 0.2.9 before 0.2.9.14, 0.3.0 before 0.3.0.13, and 0.3.1 before 0.3.1.9, an attacker can cause a denial of service (application hang) via crafted PEM input that signifies a public key requiring a password, which triggers an attempt by the OpenSSL library to ask the user for the password, aka TROVE-2017-011.

CVE-2017-8822

In Tor before 0.2.5.16, 0.2.6 through 0.2.8 before 0.2.8.17, 0.2.9 before 0.2.9.14, 0.3.0 before 0.3.0.13, and 0.3.1 before 0.3.1.9, relays (that have incompletely downloaded descriptors) can pick themselves in a circuit path, leading to a degradation of anonymity, aka TROVE-2017-012.

CVE-2017-8823

In Tor before 0.2.5.16, 0.2.6 through 0.2.8 before 0.2.8.17, 0.2.9 before 0.2.9.14, 0.3.0 before 0.3.0.13, and 0.3.1 before 0.3.1.9, there is a use-after-free in onion service v2 during intro-point expiration because the expiring list is mismanaged in certain error cases, aka TROVE-2017-013.

External References:

https://blog.torproject.org/new-stable-tor-releases-security-fixes-0319-03013-02914-02817-02516

Comment 1 Andrej Nemec 2017-12-05 10:22:01 UTC
Created tor tracking bugs for this issue:

Affects: epel-6 [bug 1520864]


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