Vulnerability Name:

CVE-2018-0491 (CCN-139858)

Assigned:2017-11-27
Published:2018-03-03
Updated:2019-03-26
Summary:A use-after-free issue was discovered in Tor 0.3.2.x before 0.3.2.10. It allows remote attackers to cause a denial of service (relay crash) because the KIST implementation allows a channel to be added more than once in the pending list.
CVSS v3 Severity:7.5 High (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
6.7 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): High
5.3 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)
4.8 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Low
CVSS v2 Severity:5.0 Medium (CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Partial
5.0 Medium (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Partial
Vulnerability Type:CWE-416
Vulnerability Consequences:Denial of Service
References:Source: MITRE
Type: CNA
CVE-2018-0491

Source: CCN
Type: Tor Blog, March 03, 2018
New stable Tor releases, with security fixes and DoS prevention: 0.3.2.10, 0.3.1.10, 0.2.9.15

Source: CONFIRM
Type: Vendor Advisory
https://blog.torproject.org/new-stable-tor-releases-security-fixes-and-dos-prevention-03210-03110-02915

Source: XF
Type: UNKNOWN
tor-cve20180491-dos(139858)

Source: CCN
Type: Packet Storm Security [07-09-2018]
Tor Browser 0.3.2.x Use-After-Free

Source: CONFIRM
Type: Issue Tracking, Mitigation, Vendor Advisory
https://trac.torproject.org/projects/tor/ticket/24700

Source: CONFIRM
Type: Issue Tracking, Patch, Vendor Advisory
https://trac.torproject.org/projects/tor/ticket/25117

Source: EXPLOIT-DB
Type: Exploit, Third Party Advisory, VDB Entry
44994

Vulnerable Configuration:Configuration 1:
  • cpe:/a:torproject:tor:*:*:*:*:*:*:*:* (Version >= 0.3.2.0 and < 0.3.2.10)

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:org.opensuse.security:def:20180491
    V
    		CVE-2018-0491
    2022-06-30
    oval:org.opensuse.security:def:113539
    P
    		tor-0.4.6.7-2.2 on GA media (Moderate)
    2022-01-17
    oval:org.opensuse.security:def:106934
    P
    		tor-0.4.6.7-2.2 on GA media (Moderate)
    2021-10-01
    oval:org.opensuse.security:def:26377
    P
    		Security update for kauth, kdelibs4 (Important)
    2020-12-01
    oval:org.opensuse.security:def:25306
    P
    		Security update for squid (Critical)
    2020-12-01
    oval:org.opensuse.security:def:25681
    P
    		Security update for xen (Important)
    2020-12-01
    oval:org.opensuse.security:def:25041
    P
    		Security update for libpcap (Important)
    2020-12-01
    oval:org.opensuse.security:def:26412
    P
    		Security update for tor (Moderate)
    2020-12-01
    oval:org.opensuse.security:def:25390
    P
    		Security update for python3 (Important)
    2020-12-01
    oval:org.opensuse.security:def:25695
    P
    		Security update for gcc9 (Moderate)
    2020-12-01
    oval:org.opensuse.security:def:25168
    P
    		Security update for libvirt (Important)
    2020-12-01
    oval:org.opensuse.security:def:25540
    P
    		Security update for java-1_7_1-ibm (Important)
    2020-12-01
    oval:org.opensuse.security:def:24966
    P
    		Security update for libu2f-host (Moderate)
    2020-12-01
    oval:org.opensuse.security:def:25739
    P
    		Security update for MozillaFirefox (Important)
    2020-12-01
    oval:org.opensuse.security:def:25249
    P
    		Security update for librsvg (Moderate)
    2020-12-01
    oval:org.opensuse.security:def:25593
    P
    		Security update for openvpn (Moderate)
    2020-12-01
    oval:org.opensuse.security:def:24977
    P
    		Security update for libxslt (Moderate)
    2020-12-01
    oval:com.ubuntu.bionic:def:201804910000000
    V
    		CVE-2018-0491 on Ubuntu 18.04 LTS (bionic) - medium.
    2018-03-05
    oval:com.ubuntu.artful:def:20180491000
    V
    		CVE-2018-0491 on Ubuntu 17.10 (artful) - medium.
    2018-03-05
    oval:com.ubuntu.xenial:def:20180491000
    V
    		CVE-2018-0491 on Ubuntu 16.04 LTS (xenial) - medium.
    2018-03-05
    oval:com.ubuntu.xenial:def:201804910000000
    V
    		CVE-2018-0491 on Ubuntu 16.04 LTS (xenial) - medium.
    2018-03-05
    oval:com.ubuntu.bionic:def:20180491000
    V
    		CVE-2018-0491 on Ubuntu 18.04 LTS (bionic) - medium.
    2018-03-05
    oval:com.ubuntu.cosmic:def:20180491000
    V
    		CVE-2018-0491 on Ubuntu 18.10 (cosmic) - medium.
    2018-03-05
    oval:com.ubuntu.cosmic:def:201804910000000
    V
    		CVE-2018-0491 on Ubuntu 18.10 (cosmic) - medium.
    2018-03-05
    oval:com.ubuntu.trusty:def:20180491000
    V
    		CVE-2018-0491 on Ubuntu 14.04 LTS (trusty) - medium.
    2018-03-05
    BACK
    torproject tor *