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Vulnerability Details : CVE-2020-11945

An issue was discovered in Squid before 5.0.2. A remote attacker can replay a sniffed Digest Authentication nonce to gain access to resources that are otherwise forbidden. This occurs because the attacker can overflow the nonce reference counter (a short integer). Remote code execution may occur if the pooled token credentials are freed (instead of replayed as valid credentials).
Publish Date : 2020-04-23 Last Update Date : 2021-03-17
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- CVSS Scores & Vulnerability Types

CVSS Score
7.5
Confidentiality Impact Partial (There is considerable informational disclosure.)
Integrity Impact Partial (Modification of some system files or information is possible, but the attacker does not have control over what can be modified, or the scope of what the attacker can affect is limited.)
Availability Impact Partial (There is reduced performance or interruptions in resource availability.)
Access Complexity Low (Specialized access conditions or extenuating circumstances do not exist. Very little knowledge or skill is required to exploit. )
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s) Execute CodeOverflow
CWE ID 190

- Related OVAL Definitions

Title Definition Id Class Family
RHSA-2020:2040: squid security update (Important) oval:com.redhat.rhsa:def:20202040 unix
RHSA-2020:2041: squid:4 security update (Important) oval:com.redhat.rhsa:def:20202041 unix
OVAL (Open Vulnerability and Assessment Language) definitions define exactly what should be done to verify a vulnerability or a missing patch. Check out the OVAL definitions if you want to learn what you should do to verify a vulnerability.

- Products Affected By CVE-2020-11945

# Product Type Vendor Product Version Update Edition Language
1 OS Canonical Ubuntu Linux 16.04 * * * Version Details Vulnerabilities
2 OS Canonical Ubuntu Linux 18.04 * * * Version Details Vulnerabilities
3 OS Canonical Ubuntu Linux 19.10 * * * Version Details Vulnerabilities
4 OS Canonical Ubuntu Linux 20.04 * * * Version Details Vulnerabilities
5 OS Debian Debian Linux 9.0 * * * Version Details Vulnerabilities
6 OS Debian Debian Linux 10.0 * * * Version Details Vulnerabilities
7 OS Fedoraproject Fedora 30 * * * Version Details Vulnerabilities
8 OS Fedoraproject Fedora 31 * * * Version Details Vulnerabilities
9 OS Fedoraproject Fedora 32 * * * Version Details Vulnerabilities
10 OS Opensuse Leap 15.1 * * * Version Details Vulnerabilities
11 Application Squid-cache Squid * * * * Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Canonical Ubuntu Linux 4
Debian Debian Linux 2
Fedoraproject Fedora 3
Opensuse Leap 1
Squid-cache Squid 1

- References For CVE-2020-11945

https://github.com/squid-cache/squid/commit/eeebf0f37a72a2de08348e85ae34b02c34e9a811
http://www.squid-cache.org/Versions/v4/changesets/squid-4-eeebf0f37a72a2de08348e85ae34b02c34e9a811.patch
http://master.squid-cache.org/Versions/v4/changesets/squid-4-eeebf0f37a72a2de08348e85ae34b02c34e9a811.patch
https://github.com/squid-cache/squid/pull/585
http://www.openwall.com/lists/oss-security/2020/04/23/2 CONFIRM
https://bugzilla.suse.com/show_bug.cgi?id=1170313 CONFIRM
https://www.debian.org/security/2020/dsa-4682
DEBIAN DSA-4682
http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00018.html
SUSE openSUSE-SU-2020:0623
https://security.gentoo.org/glsa/202005-05
GENTOO GLSA-202005-05
https://lists.fedoraproject.org/archives/list/[email protected]/message/4FWQRYZJPHAZBLXJ56FPCHJN5X2FP3VA/
FEDORA FEDORA-2020-848065cc4c
https://lists.fedoraproject.org/archives/list/[email protected]/message/RV2VZWFJNO3B56IVN56HHKJASG5DYUIX/
FEDORA FEDORA-2020-a6a921a591
https://lists.fedoraproject.org/archives/list/[email protected]/message/H4MWXEZAJSOGRJSS2JCJK4WBSND4IV46/
FEDORA FEDORA-2020-56e809930e
https://usn.ubuntu.com/4356-1/
UBUNTU USN-4356-1
https://lists.debian.org/debian-lts-announce/2020/07/msg00009.html
MLIST [debian-lts-announce] 20200710 [SECURITY] [DLA 2278-1] squid3 security update
https://security.netapp.com/advisory/ntap-20210304-0004/ CONFIRM

- Metasploit Modules Related To CVE-2020-11945

There are not any metasploit modules related to this CVE entry (Please visit www.metasploit.com for more information)


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