Vulnerability Name:

CVE-2017-8823 (CCN-135809)

Assigned:2017-12-01
Published:2017-12-01
Updated:2017-12-21
Summary: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.
CVSS v3 Severity:8.1 High (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H)
7.1 High (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): High
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): High
Availibility (A): High
7.5 High (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
6.5 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:H/E:U/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
CVSS v2 Severity:6.8 Medium (CVSS v2 Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Medium
Authentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): Partial
Availibility (A): Partial
7.8 High (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:C)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Complete
Vulnerability Type:CWE-416
Vulnerability Consequences:Denial of Service
References:Source: MITRE
Type: CNA
CVE-2017-8823

Source: CCN
Type: Tor Blog, December 01, 2017
New stable Tor releases, with security fixes: 0.3.1.9, 0.3.0.13, 0.2.9.14, 0.2.8.17, 0.2.5.16

Source: CONFIRM
Type: Vendor Advisory
https://blog.torproject.org/new-stable-tor-releases-security-fixes-0319-03013-02914-02817-02516

Source: CONFIRM
Type: Issue Tracking, Vendor Advisory
https://bugs.torproject.org/24313

Source: CONFIRM
Type: Vendor Advisory
https://bugs.torproject.org/24430

Source: XF
Type: UNKNOWN
tor-cve20178823-dos(135809)

Source: DEBIAN
Type: Third Party Advisory
DSA-4054

Vulnerable Configuration:Configuration 1:
  • cpe:/a:tor_project:tor:*:*:*:*:*:*:*:* (Version < 0.2.5.16)
  • OR cpe:/a:tor_project:tor:*:*:*:*:*:*:*:* (Version >= 0.2.6 and < 0.2.8.17)
  • OR cpe:/a:tor_project:tor:*:*:*:*:*:*:*:* (Version >= 0.2.9 and < 0.2.9.14)
  • OR cpe:/a:tor_project:tor:*:*:*:*:*:*:*:* (Version >= 0.3.0 and < 0.3.0.13)
  • OR cpe:/a:tor_project:tor:*:*:*:*:*:*:*:* (Version >= 0.3.1 and < 0.3.1.9)

    • Configuration 2:
  • cpe:/o:debian:debian_linux:8.0:*:*:*:*:*:*:*
  • OR cpe:/o:debian:debian_linux:9.0:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:org.opensuse.security:def:20178823
    V
    		CVE-2017-8823
    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:26318
    P
    		Security update for MozillaThunderbird (Moderate)
    2020-12-01
    oval:org.opensuse.security:def:25247
    P
    		Security update for libpng16 (Moderate)
    2020-12-01
    oval:org.opensuse.security:def:25622
    P
    		Security update for wavpack (Moderate)
    2020-12-01
    oval:org.opensuse.security:def:24982
    P
    		Security update for the Linux Kernel (Important)
    2020-12-01
    oval:org.opensuse.security:def:26353
    P
    		Security update for tor (Moderate)
    2020-12-01
    oval:org.opensuse.security:def:25331
    P
    		Security update for samba (Important)
    2020-12-01
    oval:org.opensuse.security:def:25636
    P
    		Security update for libproxy (Important)
    2020-12-01
    oval:org.opensuse.security:def:25109
    P
    		Security update for audit (Moderate)
    2020-12-01
    oval:org.opensuse.security:def:25481
    P
    		Security update for the Linux Kernel (Important)
    2020-12-01
    oval:org.opensuse.security:def:24907
    P
    		Security update for glibc (Moderate)
    2020-12-01
    oval:org.opensuse.security:def:25680
    P
    		Security update for krb5 (Moderate)
    2020-12-01
    oval:org.opensuse.security:def:25190
    P
    		Security update for virglrenderer (Important)
    2020-12-01
    oval:org.opensuse.security:def:25534
    P
    		Security update for adns (Important)
    2020-12-01
    oval:org.opensuse.security:def:24918
    P
    		Security update for java-1_8_0-openjdk (Important)
    2020-12-01
    oval:com.ubuntu.bionic:def:201788230000000
    V
    		CVE-2017-8823 on Ubuntu 18.04 LTS (bionic) - medium.
    2017-12-03
    oval:com.ubuntu.artful:def:20178823000
    V
    		CVE-2017-8823 on Ubuntu 17.10 (artful) - untriaged.
    2017-12-03
    oval:com.ubuntu.xenial:def:20178823000
    V
    		CVE-2017-8823 on Ubuntu 16.04 LTS (xenial) - medium.
    2017-12-03
    oval:com.ubuntu.xenial:def:201788230000000
    V
    		CVE-2017-8823 on Ubuntu 16.04 LTS (xenial) - medium.
    2017-12-03
    oval:com.ubuntu.bionic:def:20178823000
    V
    		CVE-2017-8823 on Ubuntu 18.04 LTS (bionic) - medium.
    2017-12-03
    oval:com.ubuntu.cosmic:def:20178823000
    V
    		CVE-2017-8823 on Ubuntu 18.10 (cosmic) - medium.
    2017-12-03
    oval:com.ubuntu.cosmic:def:201788230000000
    V
    		CVE-2017-8823 on Ubuntu 18.10 (cosmic) - medium.
    2017-12-03
    oval:com.ubuntu.trusty:def:20178823000
    V
    		CVE-2017-8823 on Ubuntu 14.04 LTS (trusty) - medium.
    2017-12-03
    BACK
    tor_project tor *
    tor_project tor *
    tor_project tor *
    tor_project tor *
    tor_project tor *
    debian debian linux 8.0
    debian debian linux 9.0