Vulnerability Name:

CVE-2010-2023 (CCN-59043)

Assigned:2010-05-26
Published:2010-05-26
Updated:2018-10-10
Summary:transports/appendfile.c in Exim before 4.72, when a world-writable sticky-bit mail directory is used, does not verify the st_nlink field of mailbox files, which allows local users to cause a denial of service or possibly gain privileges by creating a hard link to another user's file.
CVSS v3 Severity:5.9 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): Low
Integrity (I): Low
Availibility (A): Low
CVSS v2 Severity:4.4 Medium (CVSS v2 Vector: AV:L/AC:M/Au:N/C:P/I:P/A:P)
3.2 Low (Temporal CVSS v2 Vector: AV:L/AC:M/Au:N/C:P/I:P/A:P/E:U/RL:OF/RC:C)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Medium
Authentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): Partial
Availibility (A): Partial
4.6 Medium (CCN CVSS v2 Vector: AV:L/AC:L/Au:N/C:P/I:P/A:P)
3.4 Low (CCN Temporal CVSS v2 Vector: AV:L/AC:L/Au:N/C:P/I:P/A:P/E:U/RL:OF/RC:C)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): Partial
Availibility (A): Partial
Vulnerability Type:CWE-362
Vulnerability Consequences:Gain Privileges
References:Source: FULLDISC
Type: UNKNOWN
20100603 Multiple vulnerabilities in Exim

Source: CCN
Type: Exim Bugzilla Bug 988
CVE-2010-2023 - vulnerability with world-writable sticky mbox mail directory

Source: CONFIRM
Type: UNKNOWN
http://bugs.exim.org/show_bug.cgi?id=988

Source: MITRE
Type: CNA
CVE-2010-2023

Source: MLIST
Type: UNKNOWN
[exim-dev] 20100524 Security issues in exim4 local delivery

Source: FEDORA
Type: UNKNOWN
FEDORA-2010-9506

Source: FEDORA
Type: UNKNOWN
FEDORA-2010-9524

Source: SUSE
Type: UNKNOWN
SUSE-SR:2010:014

Source: CCN
Type: SA40019
exim Hardlink Handling and MBX Locking Two Weaknesses

Source: SECUNIA
Type: Vendor Advisory
40019

Source: SECUNIA
Type: UNKNOWN
40123

Source: SECUNIA
Type: UNKNOWN
43243

Source: CONFIRM
Type: UNKNOWN
http://vcs.exim.org/viewvc/exim/exim-doc/doc-txt/ChangeLog?view=markup&pathrev=exim-4_72_RC2

Source: CONFIRM
Type: Patch
http://vcs.exim.org/viewvc/exim/exim-src/src/transports/appendfile.c?r1=1.24&r2=1.25

Source: CCN
Type: Exim Web site
exim Internet Mailer

Source: CCN
Type: OSVDB ID: 65158
Exim transports/appendfile.c Hardlink Handling Arbitrary File Overwrite

Source: BUGTRAQ
Type: UNKNOWN
20100603 Multiple vulnerabilities in Exim

Source: BID
Type: UNKNOWN
40451

Source: CCN
Type: BID-40451
Exim Sticky Mail Directory Local Privilege Escalation Vulnerability

Source: UBUNTU
Type: UNKNOWN
USN-1060-1

Source: VUPEN
Type: UNKNOWN
ADV-2010-1402

Source: VUPEN
Type: UNKNOWN
ADV-2011-0364

Source: CONFIRM
Type: UNKNOWN
https://bugzilla.redhat.com/show_bug.cgi?id=600093

Source: XF
Type: UNKNOWN
exim-mail-directory-priv-escalation(59043)

Source: XF
Type: UNKNOWN
exim-mail-directory-priv-escalation(59043)

Vulnerable Configuration:Configuration 1:
  • cpe:/a:exim:exim:4.10:*:*:*:*:*:*:*
  • OR cpe:/a:exim:exim:4.20:*:*:*:*:*:*:*
  • OR cpe:/a:exim:exim:4.21:*:*:*:*:*:*:*
  • OR cpe:/a:exim:exim:4.22:*:*:*:*:*:*:*
  • OR cpe:/a:exim:exim:4.23:*:*:*:*:*:*:*
  • OR cpe:/a:exim:exim:4.24:*:*:*:*:*:*:*
  • OR cpe:/a:exim:exim:4.30:*:*:*:*:*:*:*
  • OR cpe:/a:exim:exim:4.31:*:*:*:*:*:*:*
  • OR cpe:/a:exim:exim:4.32:*:*:*:*:*:*:*
  • OR cpe:/a:exim:exim:4.33:*:*:*:*:*:*:*
  • OR cpe:/a:exim:exim:4.34:*:*:*:*:*:*:*
  • OR cpe:/a:exim:exim:4.40:*:*:*:*:*:*:*
  • OR cpe:/a:exim:exim:4.41:*:*:*:*:*:*:*
  • OR cpe:/a:exim:exim:4.42:*:*:*:*:*:*:*
  • OR cpe:/a:exim:exim:4.43:*:*:*:*:*:*:*
  • OR cpe:/a:exim:exim:4.44:*:*:*:*:*:*:*
  • OR cpe:/a:exim:exim:4.50:*:*:*:*:*:*:*
  • OR cpe:/a:exim:exim:4.51:*:*:*:*:*:*:*
  • OR cpe:/a:exim:exim:4.52:*:*:*:*:*:*:*
  • OR cpe:/a:exim:exim:4.53:*:*:*:*:*:*:*
  • OR cpe:/a:exim:exim:4.54:*:*:*:*:*:*:*
  • OR cpe:/a:exim:exim:4.60:*:*:*:*:*:*:*
  • OR cpe:/a:exim:exim:4.61:*:*:*:*:*:*:*
  • OR cpe:/a:exim:exim:4.62:*:*:*:*:*:*:*
  • OR cpe:/a:exim:exim:4.63:*:*:*:*:*:*:*
  • OR cpe:/a:exim:exim:4.64:*:*:*:*:*:*:*
  • OR cpe:/a:exim:exim:4.65:*:*:*:*:*:*:*
  • OR cpe:/a:exim:exim:4.66:*:*:*:*:*:*:*
  • OR cpe:/a:exim:exim:4.67:*:*:*:*:*:*:*
  • OR cpe:/a:exim:exim:4.68:*:*:*:*:*:*:*
  • OR cpe:/a:exim:exim:4.69:*:*:*:*:*:*:*
  • OR cpe:/a:exim:exim:4.70:*:*:*:*:*:*:*
  • OR cpe:/a:exim:exim:*:*:*:*:*:*:*:* (Version <= 4.71)

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:org.opensuse.security:def:20102023
    V
    		CVE-2010-2023
    2022-06-30
    oval:org.opensuse.security:def:112206
    P
    		exim-4.86.2-2.2 on GA media (Moderate)
    2022-01-17
    oval:org.opensuse.security:def:105737
    P
    		exim-4.86.2-2.2 on GA media (Moderate)
    2021-10-01
    oval:org.mitre.oval:def:13736
    P
    		USN-1060-1 -- exim4 vulnerabilities
    2014-06-30
    BACK
    exim exim 4.10
    exim exim 4.20
    exim exim 4.21
    exim exim 4.22
    exim exim 4.23
    exim exim 4.24
    exim exim 4.30
    exim exim 4.31
    exim exim 4.32
    exim exim 4.33
    exim exim 4.34
    exim exim 4.40
    exim exim 4.41
    exim exim 4.42
    exim exim 4.43
    exim exim 4.44
    exim exim 4.50
    exim exim 4.51
    exim exim 4.52
    exim exim 4.53
    exim exim 4.54
    exim exim 4.60
    exim exim 4.61
    exim exim 4.62
    exim exim 4.63
    exim exim 4.64
    exim exim 4.65
    exim exim 4.66
    exim exim 4.67
    exim exim 4.68
    exim exim 4.69
    exim exim 4.70
    exim exim *