5.3
MEDIUM
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. 7, 2023, 3:37 a.m.

Source :

[email protected]

Remotely Exploitable :

Yes !

Impact Score :

3.6

Exploitability Score :

1.6
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.

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
: Total Affected Vendor : 3 | Products : 3
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

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).

Profile Photo
yiffOS/patches

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

Shell HTML

Updated: 2 years, 9 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 [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.
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:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2021-38165 weaknesses.

CAPEC-50: Password Recovery Exploitation Password Recovery Exploitation CAPEC-102: Session Sidejacking Session Sidejacking CAPEC-474: Signature Spoofing by Key Theft Signature Spoofing by Key Theft CAPEC-509: Kerberoasting Kerberoasting CAPEC-551: Modify Existing Service Modify Existing Service CAPEC-555: Remote Services with Stolen Credentials Remote Services with Stolen Credentials CAPEC-560: Use of Known Domain Credentials Use of Known Domain Credentials CAPEC-561: Windows Admin Shares with Stolen Credentials Windows Admin Shares with Stolen Credentials CAPEC-600: Credential Stuffing Credential Stuffing CAPEC-644: Use of Captured Hashes (Pass The Hash) Use of Captured Hashes (Pass The Hash) CAPEC-645: Use of Captured Tickets (Pass The Ticket) Use of Captured Tickets (Pass The Ticket) CAPEC-652: Use of Known Kerberos Credentials Use of Known Kerberos Credentials CAPEC-653: Use of Known Operating System Credentials Use of Known Operating System Credentials
Exploit Prediction

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

0.62 }} 0.18%

score

0.78562

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
: