Vulnerability Name:

CVE-2016-6866 (CCN-125123)

Assigned:2016-08-18
Published:2016-08-18
Updated:2017-02-17
Summary:slock allows attackers to bypass the screen lock via vectors involving an invalid password hash, which triggers a NULL pointer dereference and crash.
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)
6.5 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: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
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: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
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-476
Vulnerability Consequences:Denial of Service
References:Source: MITRE
Type: CNA
CVE-2016-6866

Source: CCN
Type: slock GIT Repository
fix CVE-2016-6866

Source: CONFIRM
Type: Patch, Vendor Advisory
http://git.suckless.org/slock/commit/?id=d8bec0f6fdc8a246d78cb488a0068954b46fcb29

Source: MISC
Type: Third Party Advisory
http://s1m0n.dft-labs.eu/files/slock/slock.txt

Source: CCN
Type: oss-sec Mailing List, Thu, 18 Aug 2016 11:44:56 -0700
CVE request - slock, all versions NULL pointer dereference

Source: MLIST
Type: Mailing List, Third Party Advisory
[oss-security] 20160818 CVE request - slock, all versions NULL pointer dereference

Source: MLIST
Type: Mailing List, Third Party Advisory
[oss-security] 20160818 Re: CVE request - slock, all versions NULL pointer dereference

Source: BID
Type: Third Party Advisory, VDB Entry
92546

Source: CCN
Type: BID-92546
slock CVE-2016-6866 NULL Pointer Dereference Denial of Service Vulnerability

Source: XF
Type: UNKNOWN
slock-cve20166866-dos(125123)

Source: FEDORA
Type: Third Party Advisory
FEDORA-2016-1b7e66c08b

Source: FEDORA
Type: Third Party Advisory
FEDORA-2016-985b68721b

Vulnerable Configuration:Configuration 1:
  • cpe:/a:suckless:slock:*:*:*:*:*:*:*:* (Version <= 1.3)

  • Configuration 2:
  • cpe:/o:fedoraproject:fedora:24:*:*:*:*:*:*:*
  • OR cpe:/o:fedoraproject:fedora:25:*:*:*:*:*:*:*

  • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:com.ubuntu.bionic:def:201668660000000
    V
    CVE-2016-6866 on Ubuntu 18.04 LTS (bionic) - low.
    2017-02-15
    oval:com.ubuntu.artful:def:20166866000
    V
    CVE-2016-6866 on Ubuntu 17.10 (artful) - low.
    2017-02-15
    oval:com.ubuntu.trusty:def:20166866000
    V
    CVE-2016-6866 on Ubuntu 14.04 LTS (trusty) - low.
    2017-02-15
    oval:com.ubuntu.xenial:def:201668660000000
    V
    CVE-2016-6866 on Ubuntu 16.04 LTS (xenial) - low.
    2017-02-15
    oval:com.ubuntu.bionic:def:20166866000
    V
    CVE-2016-6866 on Ubuntu 18.04 LTS (bionic) - low.
    2017-02-15
    oval:com.ubuntu.xenial:def:20166866000
    V
    CVE-2016-6866 on Ubuntu 16.04 LTS (xenial) - low.
    2017-02-15
    oval:com.ubuntu.cosmic:def:20166866000
    V
    CVE-2016-6866 on Ubuntu 18.10 (cosmic) - low.
    2017-02-15
    oval:com.ubuntu.cosmic:def:201668660000000
    V
    CVE-2016-6866 on Ubuntu 18.10 (cosmic) - low.
    2017-02-15
    oval:com.ubuntu.precise:def:20166866000
    V
    CVE-2016-6866 on Ubuntu 12.04 LTS (precise) - low.
    2017-02-15
    BACK
    suckless slock *
    fedoraproject fedora 24
    fedoraproject fedora 25