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).

CVSS v3.0 9.8 CRITICAL
CVSS v2.0 7.5 HIGH

9.8^/10

CVSS v3.0 : CRITICAL

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

7.5^/10

CVSS v2.0 : HIGH

V2 Legend

Vector : AV:N/AC:L/Au:N/C:P/I:P/A:P

Exploitability : 10.0 / Impact : 6.4

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
https://github.com/squid-cache/squid/commit/eeebf0f37a72a2de08348e85ae34b02c34e9a811	Patch Third Party Advisory
http://www.squid-cache.org/Versions/v4/changesets/squid-4-eeebf0f37a72a2de08348e85ae34b02c34e9a811.patch	Patch Vendor Advisory
http://master.squid-cache.org/Versions/v4/changesets/squid-4-eeebf0f37a72a2de08348e85ae34b02c34e9a811.patch	Vendor Advisory
https://github.com/squid-cache/squid/pull/585	Patch Third Party Advisory
http://www.openwall.com/lists/oss-security/2020/04/23/2	Mailing List Third Party Advisory
https://bugzilla.suse.com/show_bug.cgi?id=1170313	Issue Tracking Third Party Advisory
https://www.debian.org/security/2020/dsa-4682	Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00018.html	Mailing List Third Party Advisory
https://security.gentoo.org/glsa/202005-05	Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4FWQRYZJPHAZBLXJ56FPCHJN5X2FP3VA/	Mailing List Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RV2VZWFJNO3B56IVN56HHKJASG5DYUIX/	Mailing List Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/H4MWXEZAJSOGRJSS2JCJK4WBSND4IV46/	Mailing List Third Party Advisory
https://usn.ubuntu.com/4356-1/	Third Party Advisory
https://lists.debian.org/debian-lts-announce/2020/07/msg00009.html	Mailing List Third Party Advisory
https://security.netapp.com/advisory/ntap-20210304-0004/	Third Party Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:squid-cache:squid::::::::
	cpe:2.3:a:squid-cache:squid::::::::
	cpe:2.3:a:squid-cache:squid::::::::

Configuration 2 (hide)

OR	cpe:2.3:o:debian:debian_linux:9.0:::::::*
	cpe:2.3:o:debian:debian_linux:10.0:::::::*

Configuration 3 (hide)

cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*

Configuration 4 (hide)

OR	cpe:2.3:o:fedoraproject:fedora:30:::::::*
	cpe:2.3:o:fedoraproject:fedora:31:::::::*
	cpe:2.3:o:fedoraproject:fedora:32:::::::*

Configuration 5 (hide)

OR	cpe:2.3:o:canonical:ubuntu_linux:16.04::::lts:::
	cpe:2.3:o:canonical:ubuntu_linux:18.04::::lts:::
	cpe:2.3:o:canonical:ubuntu_linux:19.10:::::::*
	cpe:2.3:o:canonical:ubuntu_linux:20.04::::lts:::

Information

Published : 2020-04-23 08:15

Updated : 2021-03-17 05:40

NVD link : CVE-2020-11945

Mitre link : CVE-2020-11945

JSON object : View

CWE

CWE-190

Integer Overflow or Wraparound

Products Affected

fedoraproject

fedora

canonical

ubuntu_linux

opensuse

leap

debian

debian_linux

squid-cache

squid

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9.8 /10