CVE-2020-11945
9.8
CRITICAL · CVSS 3.1 · EPSS 27.2% (pctl 98)
Patch early
EPSS 27.2% — above the 10% action threshold.
Description
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).
Scoring
| CVSS | 9.8 (CRITICAL, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| EPSS | 27.25% — more likely to be exploited than 98% of all CVEs |
| Weakness | CWE-190 |
| On CISA KEV | no |
| Public exploit | none known |
| Published | 2020-04-23 |
| Last modified | 2026-06-17 |
Affected (5)
| Vendor | Product |
|---|---|
| canonical | ubuntu linux |
| debian | debian linux |
| fedoraproject | fedora |
| opensuse | leap |
| squid-cache | squid |
References
- http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00018.html
- http://master.squid-cache.org/Versions/v4/changesets/squid-4-eeebf0f37a72a2de08348e85ae34b02c34e9a811.patch
- http://www.openwall.com/lists/oss-security/2020/04/23/2
- http://www.squid-cache.org/Versions/v4/changesets/squid-4-eeebf0f37a72a2de08348e85ae34b02c34e9a811.patch
- https://bugzilla.suse.com/show_bug.cgi?id=1170313
- https://github.com/squid-cache/squid/commit/eeebf0f37a72a2de08348e85ae34b02c34e9a811
- https://github.com/squid-cache/squid/pull/585
- https://lists.debian.org/debian-lts-announce/2020/07/msg00009.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4FWQRYZJPHAZBLXJ56FPCHJN5X2FP3VA/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/H4MWXEZAJSOGRJSS2JCJK4WBSND4IV46/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RV2VZWFJNO3B56IVN56HHKJASG5DYUIX/
- https://security.gentoo.org/glsa/202005-05
- https://security.netapp.com/advisory/ntap-20210304-0004/
- https://usn.ubuntu.com/4356-1/
- https://www.debian.org/security/2020/dsa-4682
- http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00018.html
- http://master.squid-cache.org/Versions/v4/changesets/squid-4-eeebf0f37a72a2de08348e85ae34b02c34e9a811.patch
- http://www.openwall.com/lists/oss-security/2020/04/23/2
- http://www.squid-cache.org/Versions/v4/changesets/squid-4-eeebf0f37a72a2de08348e85ae34b02c34e9a811.patch
- https://bugzilla.suse.com/show_bug.cgi?id=1170313
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