PT-2020-14500 · Openssl+4 · Openssl+4
Published
2019-05-07
·
Updated
2024-06-15
·
CVE-2020-15572
CVSS v3.1
7.5
High
| Vector | AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Name of the Vulnerable Software and Affected Versions
Tor versions prior to 0.4.3.6
Description
The issue is caused by an out-of-bounds memory access, allowing a remote denial-of-service (crash) attack against Tor instances built to use Mozilla Network Security Services (NSS). This problem only occurs when Tor is built with the NSS library, which requires the "--enable-nss" flag, as Tor is compiled with OpenSSL by default.
Recommendations
For Tor versions prior to 0.4.3.6, update to version 0.4.3.6 or later to resolve the issue. As a temporary workaround, consider avoiding the use of the NSS library by compiling Tor with OpenSSL, which is the default configuration.
Fix
DoS
Out of bounds Read
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Weakness Enumeration
Related Identifiers
Affected Products
Alt Linux
Nss
Openssl
Suse
Tor