Vulnerability Name:

CVE-2021-27135 (CCN-196820)

Assigned:2021-02-10
Published:2021-02-10
Updated:2022-09-30
Summary:xterm before Patch #366 allows remote attackers to execute arbitrary code or cause a denial of service (segmentation fault) via a crafted UTF-8 combining character sequence.
CVSS v3 Severity:9.8 Critical (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
8.5 High (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/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): Low
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
9.6 Critical (REDHAT CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H)
8.3 High (REDHAT Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/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): Required
Scope:Scope (S): Changed
Impact Metrics:Confidentiality (C): High
Integrity (I): High
Availibility (A): High
CVSS v2 Severity:7.5 High (CVSS v2 Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
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-noinfo
CWE-787
Vulnerability Consequences:Denial of Service
References:Source: MITRE
Type: CNA
CVE-2021-27135

Source: FULLDISC
Type: Mailing List, Third Party Advisory
20210520 CVE-2021-31535 libX11 Insufficient Length Checks PoC and Archeology

Source: MLIST
Type: Mailing List, Third Party Advisory
[oss-security] 20210210 Re: Re: screen crash processing combining characters

Source: MISC
Type: Third Party Advisory
https://access.redhat.com/security/cve/CVE-2021-27135

Source: MISC
Type: Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=1927559

Source: CONFIRM
Type: Issue Tracking
https://bugzilla.suse.com/show_bug.cgi?id=1182091

Source: XF
Type: UNKNOWN
xterm-cve202127135-dos(196820)

Source: CONFIRM
Type: Patch, Third Party Advisory
https://github.com/ThomasDickey/xterm-snapshots/commit/82ba55b8f994ab30ff561a347b82ea340ba7075c

Source: CCN
Type: XTerm Web site
XTerm

Source: CONFIRM
Type: Release Notes, Vendor Advisory
https://invisible-island.net/xterm/xterm.log.html

Source: MLIST
Type: Mailing List, Third Party Advisory
[debian-lts-announce] 20210213 [SECURITY] [DLA 2558-1] xterm security update

Source: FEDORA
Type: Mailing List, Patch, Third Party Advisory
FEDORA-2021-e7a8e79fa8

Source: MISC
Type: Issue Tracking, Third Party Advisory
https://news.ycombinator.com/item?id=26524650

Source: GENTOO
Type: Third Party Advisory
GLSA-202208-22

Source: MISC
Type: Mailing List, Third Party Advisory
https://www.openwall.com/lists/oss-security/2021/02/09/7

Source: MISC
Type: Mailing List, Third Party Advisory
https://www.openwall.com/lists/oss-security/2021/02/09/9

Source: CCN
Type: oss-sec Mailing List, Wed, 10 Feb 2021 21:25:57 +0530
Re: Re: screen crash processing combining characters

Vulnerable Configuration:Configuration 1:
  • cpe:/a:invisible-island:xterm:*:*:*:*:*:*:*:* (Version < 366)

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

    • Configuration 3:
  • cpe:/o:fedoraproject:fedora:33:*:*:*:*:*:*:*

    • Configuration RedHat 1:
  • cpe:/a:redhat:enterprise_linux:8:*:*:*:*:*:*:*

    • Configuration RedHat 2:
  • cpe:/a:redhat:enterprise_linux:8::appstream:*:*:*:*:*

    • Configuration RedHat 3:
  • cpe:/o:redhat:enterprise_linux:7:*:*:*:*:*:*:*

    • Configuration RedHat 4:
  • cpe:/o:redhat:enterprise_linux:7::client:*:*:*:*:*

    • Configuration RedHat 5:
  • cpe:/o:redhat:enterprise_linux:7::computenode:*:*:*:*:*

    • Configuration RedHat 6:
  • cpe:/o:redhat:enterprise_linux:7::server:*:*:*:*:*

    • Configuration RedHat 7:
  • cpe:/o:redhat:enterprise_linux:7::workstation:*:*:*:*:*

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:org.opensuse.security:def:726
    P
    		Security update for ImageMagick (Moderate)
    2022-09-02
    oval:org.opensuse.security:def:3627
    P
    		Security update for openssl-1_1 (Important)
    2022-07-06
    oval:org.opensuse.security:def:3443
    P
    		ntp-4.2.8p15-4.19.1 on GA media (Moderate)
    2022-06-22
    oval:org.opensuse.security:def:3231
    P
    		xterm-330-11.3.1 on GA media (Moderate)
    2022-06-22
    oval:org.opensuse.security:def:94861
    P
    		xterm-330-11.3.1 on GA media (Moderate)
    2022-06-22
    oval:org.opensuse.security:def:94555
    P
    		g3utils-1.1.37-3.11.2 on GA media (Moderate)
    2022-06-22
    oval:org.opensuse.security:def:393
    P
    		xterm-330-11.3.1 on GA media (Moderate)
    2022-06-10
    oval:org.opensuse.security:def:113608
    P
    		xterm-368-2.2 on GA media (Moderate)
    2022-01-17
    oval:org.opensuse.security:def:99485
    P
    		 (Moderate)
    2022-01-11
    oval:org.opensuse.security:def:99684
    P
    		 (Important)
    2021-10-15
    oval:org.opensuse.security:def:106991
    P
    		xterm-368-2.2 on GA media (Moderate)
    2021-10-01
    oval:org.opensuse.security:def:99992
    P
    		 (Low)
    2021-09-07
    oval:org.opensuse.security:def:101268
    P
    		go1.16-1.16.3-1.11.1 on GA media (Moderate)
    2021-08-09
    oval:org.opensuse.security:def:111592
    P
    		Security update for xterm (Important)
    2021-07-09
    oval:org.opensuse.security:def:111448
    P
    		Security update for xterm (Important)
    2021-06-23
    oval:org.opensuse.security:def:32951
    P
    		Security update for xterm (Important)
    2021-06-18
    oval:org.opensuse.security:def:64716
    P
    		Security update for xterm (Important)
    2021-06-18
    oval:org.opensuse.security:def:23927
    P
    		Security update for xterm (Important)
    2021-06-18
    oval:org.opensuse.security:def:57467
    P
    		Security update for xterm (Important)
    2021-06-18
    oval:org.opensuse.security:def:88459
    P
    		Security update for xterm (Important)
    2021-06-18
    oval:org.opensuse.security:def:84166
    P
    		Security update for xterm (Important)
    2021-06-18
    oval:org.opensuse.security:def:9735
    P
    		Security update for xterm (Important)
    2021-06-18
    oval:org.opensuse.security:def:92933
    P
    		Security update for xterm (Important)
    2021-06-18
    oval:org.opensuse.security:def:70245
    P
    		Security update for xterm (Important)
    2021-06-18
    oval:org.opensuse.security:def:31204
    P
    		Security update for xterm (Important)
    2021-06-18
    oval:org.opensuse.security:def:59757
    P
    		Security update for xterm (Important)
    2021-06-18
    oval:org.opensuse.security:def:99094
    P
    		Security update for xterm (Important)
    2021-06-18
    oval:org.opensuse.security:def:55918
    P
    		Security update for xterm (Important)
    2021-06-18
    oval:org.opensuse.security:def:86587
    P
    		Security update for xterm (Important)
    2021-06-18
    oval:org.opensuse.security:def:73838
    P
    		Security update for xterm (Important)
    2021-06-18
    oval:org.opensuse.security:def:82594
    P
    		Security update for xterm (Important)
    2021-06-18
    oval:org.opensuse.security:def:8983
    P
    		Security update for xterm (Important)
    2021-06-18
    oval:org.opensuse.security:def:92336
    P
    		Security update for xterm (Important)
    2021-06-18
    oval:org.opensuse.security:def:33676
    P
    		Security update for xterm (Important)
    2021-06-18
    oval:org.opensuse.security:def:69491
    P
    		Security update for xterm (Important)
    2021-06-18
    oval:org.opensuse.security:def:29387
    P
    		Security update for xterm (Important)
    2021-06-18
    oval:org.opensuse.security:def:57946
    P
    		Security update for xterm (Important)
    2021-06-18
    oval:org.opensuse.security:def:89154
    P
    		Security update for xterm (Important)
    2021-06-18
    oval:org.opensuse.security:def:107934
    P
    		Security update for xterm (Important)
    2021-06-18
    oval:org.opensuse.security:def:51591
    P
    		Security update for xterm (Important)
    2021-06-18
    oval:org.opensuse.security:def:84624
    P
    		Security update for xterm (Important)
    2021-06-18
    oval:org.opensuse.security:def:10105
    P
    		Security update for xterm (Important)
    2021-06-18
    oval:org.opensuse.security:def:93086
    P
    		Security update for xterm (Important)
    2021-06-18
    oval:org.opensuse.security:def:70426
    P
    		Security update for xterm (Important)
    2021-06-18
    oval:org.opensuse.security:def:31644
    P
    		Security update for xterm (Important)
    2021-06-18
    oval:org.opensuse.security:def:60293
    P
    		Security update for xterm (Important)
    2021-06-18
    oval:org.opensuse.security:def:99286
    P
    		Security update for xterm (Important)
    2021-06-18
    oval:org.opensuse.security:def:56038
    P
    		Security update for xterm (Important)
    2021-06-18
    oval:org.opensuse.security:def:87415
    P
    		Security update for xterm (Important)
    2021-06-18
    oval:org.opensuse.security:def:83302
    P
    		Security update for xterm (Important)
    2021-06-18
    oval:org.opensuse.security:def:9351
    P
    		Security update for xterm (Important)
    2021-06-18
    oval:org.opensuse.security:def:92535
    P
    		Security update for xterm (Important)
    2021-06-18
    oval:org.opensuse.security:def:33934
    P
    		Security update for xterm (Important)
    2021-06-18
    oval:org.opensuse.security:def:69676
    P
    		Security update for xterm (Important)
    2021-06-18
    oval:org.opensuse.security:def:30095
    P
    		Security update for xterm (Important)
    2021-06-18
    oval:org.opensuse.security:def:58774
    P
    		Security update for xterm (Important)
    2021-06-18
    oval:org.opensuse.security:def:89412
    P
    		Security update for xterm (Important)
    2021-06-18
    oval:org.opensuse.security:def:51915
    P
    		Security update for xterm (Important)
    2021-06-18
    oval:org.opensuse.security:def:85668
    P
    		Security update for xterm (Important)
    2021-06-18
    oval:org.opensuse.security:def:97083
    P
    		Security update for xterm (Important)
    2021-06-18
    oval:org.opensuse.security:def:10286
    P
    		Security update for xterm (Important)
    2021-06-18
    oval:org.opensuse.security:def:93239
    P
    		Security update for xterm (Important)
    2021-06-18
    oval:org.opensuse.security:def:8607
    P
    		Security update for xterm (Important)
    2021-06-18
    oval:org.opensuse.security:def:91949
    P
    		Security update for xterm (Important)
    2021-06-18
    oval:org.opensuse.security:def:32123
    P
    		Security update for xterm (Important)
    2021-06-18
    oval:org.opensuse.security:def:64532
    P
    		Security update for xterm (Important)
    2021-06-18
    oval:org.opensuse.security:def:23603
    P
    		Security update for xterm (Important)
    2021-06-18
    oval:org.opensuse.security:def:57027
    P
    		Security update for xterm (Important)
    2021-06-18
    oval:org.opensuse.security:def:88146
    P
    		Security update for xterm (Important)
    2021-06-18
    oval:org.opensuse.security:def:83422
    P
    		Security update for xterm (Important)
    2021-06-18
    oval:org.opensuse.security:def:9536
    P
    		Security update for xterm (Important)
    2021-06-18
    oval:org.opensuse.security:def:92734
    P
    		Security update for xterm (Important)
    2021-06-18
    oval:org.opensuse.security:def:34470
    P
    		Security update for xterm (Important)
    2021-06-18
    oval:org.opensuse.security:def:69875
    P
    		Security update for xterm (Important)
    2021-06-18
    oval:org.opensuse.security:def:101457
    P
    		Security update for xterm (Important)
    2021-06-18
    oval:org.opensuse.security:def:30215
    P
    		Security update for xterm (Important)
    2021-06-18
    oval:org.opensuse.security:def:59499
    P
    		Security update for xterm (Important)
    2021-06-18
    oval:org.opensuse.security:def:98899
    P
    		Security update for xterm (Important)
    2021-06-18
    oval:org.opensuse.security:def:55210
    P
    		Security update for xterm (Important)
    2021-06-18
    oval:org.opensuse.security:def:86108
    P
    		Security update for xterm (Important)
    2021-06-18
    oval:org.opensuse.security:def:97085
    P
    		Security update for xterm (Important)
    2021-06-18
    oval:org.opensuse.security:def:73654
    P
    		Security update for xterm (Important)
    2021-06-18
    oval:org.opensuse.security:def:8788
    P
    		Security update for xterm (Important)
    2021-06-18
    oval:org.opensuse.security:def:92144
    P
    		Security update for xterm (Important)
    2021-06-18
    oval:org.opensuse.security:def:46347
    P
    		Security update for xterm (Important)
    2021-06-14
    oval:org.opensuse.security:def:41081
    P
    		Security update for xterm (Important)
    2021-06-14
    oval:org.opensuse.security:def:41917
    P
    		Security update for xterm (Important)
    2021-06-14
    oval:org.opensuse.security:def:44080
    P
    		Security update for xterm (Important)
    2021-06-14
    oval:org.opensuse.security:def:38369
    P
    		Security update for xterm (Important)
    2021-06-14
    oval:org.opensuse.security:def:45511
    P
    		Security update for xterm (Important)
    2021-06-14
    oval:org.opensuse.security:def:39650
    P
    		Security update for xterm (Important)
    2021-06-14
    oval:com.redhat.rhsa:def:20210617
    P
    		RHSA-2021:0617: xterm security update (Important)
    2021-02-22
    oval:com.redhat.rhsa:def:20210611
    P
    		RHSA-2021:0611: xterm security update (Important)
    2021-02-18
    BACK
    invisible-island xterm *
    debian debian linux 9.0
    fedoraproject fedora 33