5.3
MEDIUM CVSS 3.1
CVE-2021-38165
Lynx SSL/TLS Client Certificate Disclosure Vulnerability
Description

Lynx through 2.8.9 mishandles the userinfo subcomponent of a URI, which allows remote attackers to discover cleartext credentials because they may appear in SNI data.

INFO

Published Date :

Aug. 7, 2021, 6:15 p.m.

Last Modified :

Nov. 21, 2024, 6:16 a.m.

Remotely Exploit :

Yes !
Affected Products

The following products are affected by CVE-2021-38165 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Fedoraproject fedora
1 Debian debian_linux
1 Lynx_project lynx
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 2.0 LOW [email protected]
CVSS 3.1 MEDIUM [email protected]
Solution
Updating Lynx to the latest version addresses the SSL/TLS client certificate disclosure vulnerability.
  • Update the Lynx package.
  • Apply available updates from your distribution.
Public PoC/Exploit Available at Github

CVE-2021-38165 has a 1 public PoC/Exploit available at Github. Go to the Public Exploits tab to see the list.

References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2021-38165.

URL Resource
http://www.openwall.com/lists/oss-security/2021/08/07/11 Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/08/07/12 Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/08/07/9 Mailing List Third Party Advisory
https://bugs.debian.org/991971 Issue Tracking Third Party Advisory
https://github.com/w3c/libwww/blob/f010b4cc58d32f34b162f0084fe093f7097a61f0/Library/src/HTParse.c#L118 Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/08/msg00010.html Mailing List Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7YMUHFJJWTZ6HBHTYXVDPNZINGGURHDW/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/K6PZF7JNTFCOJ62HXZG4Q2NEHSZ6IO2V/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VKNK7GQBJBUBMJVNKVC7RTCYWUYMFJQW/
https://lynx.invisible-island.net/current/CHANGES.html Release Notes Third Party Advisory
https://www.debian.org/security/2021/dsa-4953 Third Party Advisory
https://www.openwall.com/lists/oss-security/2021/08/07/1 Mailing List Third Party Advisory
https://www.openwall.com/lists/oss-security/2021/08/07/11 Mailing List
http://www.openwall.com/lists/oss-security/2021/08/07/11 Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/08/07/12 Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/08/07/9 Mailing List Third Party Advisory
https://bugs.debian.org/991971 Issue Tracking Third Party Advisory
https://github.com/w3c/libwww/blob/f010b4cc58d32f34b162f0084fe093f7097a61f0/Library/src/HTParse.c#L118 Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/08/msg00010.html Mailing List Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7YMUHFJJWTZ6HBHTYXVDPNZINGGURHDW/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/K6PZF7JNTFCOJ62HXZG4Q2NEHSZ6IO2V/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VKNK7GQBJBUBMJVNKVC7RTCYWUYMFJQW/
https://lynx.invisible-island.net/current/CHANGES.html Release Notes Third Party Advisory
https://www.debian.org/security/2021/dsa-4953 Third Party Advisory
https://www.openwall.com/lists/oss-security/2021/08/07/1 Mailing List Third Party Advisory
https://www.openwall.com/lists/oss-security/2021/08/07/11 Mailing List
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2021-38165 is associated with the following CWEs:

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Various patches for yiffOS packages. Mirror of https://git.yiffos.gay/Core/patches

Shell HTML

Updated: 3 years, 8 months ago
0 stars 1 fork 1 watcher
Born at : Sept. 20, 2021, 12:30 a.m. This repo has been linked 1 different CVEs too.

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2021-38165 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2021-38165 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Nov. 21, 2024

    Action Type Old Value New Value
    Added Reference http://www.openwall.com/lists/oss-security/2021/08/07/11
    Added Reference http://www.openwall.com/lists/oss-security/2021/08/07/12
    Added Reference http://www.openwall.com/lists/oss-security/2021/08/07/9
    Added Reference https://bugs.debian.org/991971
    Added Reference https://github.com/w3c/libwww/blob/f010b4cc58d32f34b162f0084fe093f7097a61f0/Library/src/HTParse.c#L118
    Added Reference https://lists.debian.org/debian-lts-announce/2021/08/msg00010.html
    Added Reference https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7YMUHFJJWTZ6HBHTYXVDPNZINGGURHDW/
    Added Reference https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/K6PZF7JNTFCOJ62HXZG4Q2NEHSZ6IO2V/
    Added Reference https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VKNK7GQBJBUBMJVNKVC7RTCYWUYMFJQW/
    Added Reference https://lynx.invisible-island.net/current/CHANGES.html
    Added Reference https://www.debian.org/security/2021/dsa-4953
    Added Reference https://www.openwall.com/lists/oss-security/2021/08/07/1
    Added Reference https://www.openwall.com/lists/oss-security/2021/08/07/11
  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • CVE Modified by [email protected]

    Nov. 07, 2023

    Action Type Old Value New Value
    Added Reference MITRE https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VKNK7GQBJBUBMJVNKVC7RTCYWUYMFJQW/ [No types assigned]
    Added Reference MITRE https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/K6PZF7JNTFCOJ62HXZG4Q2NEHSZ6IO2V/ [No types assigned]
    Added Reference MITRE https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7YMUHFJJWTZ6HBHTYXVDPNZINGGURHDW/ [No types assigned]
    Removed Reference MITRE https://lists.fedoraproject.org/archives/list/[email protected]/message/VKNK7GQBJBUBMJVNKVC7RTCYWUYMFJQW/
    Removed Reference MITRE https://lists.fedoraproject.org/archives/list/[email protected]/message/K6PZF7JNTFCOJ62HXZG4Q2NEHSZ6IO2V/
    Removed Reference MITRE https://lists.fedoraproject.org/archives/list/[email protected]/message/7YMUHFJJWTZ6HBHTYXVDPNZINGGURHDW/
  • Modified Analysis by [email protected]

    Dec. 02, 2021

    Action Type Old Value New Value
    Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/7YMUHFJJWTZ6HBHTYXVDPNZINGGURHDW/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/7YMUHFJJWTZ6HBHTYXVDPNZINGGURHDW/ Mailing List, Third Party Advisory
    Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/K6PZF7JNTFCOJ62HXZG4Q2NEHSZ6IO2V/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/K6PZF7JNTFCOJ62HXZG4Q2NEHSZ6IO2V/ Mailing List, Third Party Advisory
    Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/VKNK7GQBJBUBMJVNKVC7RTCYWUYMFJQW/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/VKNK7GQBJBUBMJVNKVC7RTCYWUYMFJQW/ Mailing List, Third Party Advisory
    Added CPE Configuration OR *cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* *cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* *cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*
  • CVE Modified by [email protected]

    Sep. 24, 2021

    Action Type Old Value New Value
    Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/7YMUHFJJWTZ6HBHTYXVDPNZINGGURHDW/ [No Types Assigned]
  • CVE Modified by [email protected]

    Sep. 20, 2021

    Action Type Old Value New Value
    Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/K6PZF7JNTFCOJ62HXZG4Q2NEHSZ6IO2V/ [No Types Assigned]
  • CVE Modified by [email protected]

    Sep. 08, 2021

    Action Type Old Value New Value
    Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/VKNK7GQBJBUBMJVNKVC7RTCYWUYMFJQW/ [No Types Assigned]
  • Reanalysis by [email protected]

    Aug. 24, 2021

    Action Type Old Value New Value
    Added CVSS V2 Metadata Victim must voluntarily interact with attack mechanism
    Removed CVSS V2 NIST (AV:N/AC:L/Au:N/C:P/I:N/A:N)
    Added CVSS V2 NIST (AV:N/AC:H/Au:N/C:P/I:N/A:N)
    Removed CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
    Added CVSS V3.1 NIST AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N
  • Initial Analysis by [email protected]

    Aug. 14, 2021

    Action Type Old Value New Value
    Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:P/I:N/A:N)
    Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
    Changed Reference Type http://www.openwall.com/lists/oss-security/2021/08/07/11 No Types Assigned http://www.openwall.com/lists/oss-security/2021/08/07/11 Mailing List, Third Party Advisory
    Changed Reference Type http://www.openwall.com/lists/oss-security/2021/08/07/12 No Types Assigned http://www.openwall.com/lists/oss-security/2021/08/07/12 Mailing List, Third Party Advisory
    Changed Reference Type http://www.openwall.com/lists/oss-security/2021/08/07/9 No Types Assigned http://www.openwall.com/lists/oss-security/2021/08/07/9 Mailing List, Third Party Advisory
    Changed Reference Type https://bugs.debian.org/991971 No Types Assigned https://bugs.debian.org/991971 Issue Tracking, Third Party Advisory
    Changed Reference Type https://github.com/w3c/libwww/blob/f010b4cc58d32f34b162f0084fe093f7097a61f0/Library/src/HTParse.c#L118 No Types Assigned https://github.com/w3c/libwww/blob/f010b4cc58d32f34b162f0084fe093f7097a61f0/Library/src/HTParse.c#L118 Third Party Advisory
    Changed Reference Type https://lists.debian.org/debian-lts-announce/2021/08/msg00010.html No Types Assigned https://lists.debian.org/debian-lts-announce/2021/08/msg00010.html Mailing List, Third Party Advisory
    Changed Reference Type https://lynx.invisible-island.net/current/CHANGES.html No Types Assigned https://lynx.invisible-island.net/current/CHANGES.html Release Notes, Third Party Advisory
    Changed Reference Type https://www.debian.org/security/2021/dsa-4953 No Types Assigned https://www.debian.org/security/2021/dsa-4953 Third Party Advisory
    Changed Reference Type https://www.openwall.com/lists/oss-security/2021/08/07/1 No Types Assigned https://www.openwall.com/lists/oss-security/2021/08/07/1 Mailing List, Third Party Advisory
    Changed Reference Type https://www.openwall.com/lists/oss-security/2021/08/07/11 No Types Assigned https://www.openwall.com/lists/oss-security/2021/08/07/11 Mailing List
    Added CWE NIST CWE-522
    Added CPE Configuration OR *cpe:2.3:a:lynx_project:lynx:*:*:*:*:*:*:*:* versions up to (including) 2.8.9
    Added CPE Configuration OR *cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* *cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
  • CVE Modified by [email protected]

    Aug. 10, 2021

    Action Type Old Value New Value
    Added Reference https://www.debian.org/security/2021/dsa-4953 [No Types Assigned]
  • CVE Modified by [email protected]

    Aug. 09, 2021

    Action Type Old Value New Value
    Added Reference https://lists.debian.org/debian-lts-announce/2021/08/msg00010.html [No Types Assigned]
  • CVE Modified by [email protected]

    Aug. 08, 2021

    Action Type Old Value New Value
    Added Reference http://www.openwall.com/lists/oss-security/2021/08/07/12 [No Types Assigned]
    Added Reference http://www.openwall.com/lists/oss-security/2021/08/07/11 [No Types Assigned]
  • CVE Modified by [email protected]

    Aug. 07, 2021

    Action Type Old Value New Value
    Changed Description HTParse in Lynx through 2.8.9 mishandles the userinfo subcomponent of a URI, which allows remote attackers to discover cleartext credentials because they may appear in SNI data or HTTP headers. Lynx through 2.8.9 mishandles the userinfo subcomponent of a URI, which allows remote attackers to discover cleartext credentials because they may appear in SNI data.
    Removed Reference https://www.openwall.com/lists/oss-security/2021/08/07/7 [No Types Assigned]
    Added Reference https://www.openwall.com/lists/oss-security/2021/08/07/11 [No Types Assigned]
    Added Reference http://www.openwall.com/lists/oss-security/2021/08/07/9 [No Types Assigned]
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
Vulnerability Scoring Details
Base CVSS Score: 5.3
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact
Base CVSS Score: 2.6
Access Vector
Access Complexity
Authentication
Confidentiality Impact
Integrity Impact
Availability Impact
Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

2.89 }} -0.47%

score

0.85640

percentile