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CVE-2023-49285Denial of Service in HTTP Message Processing in Squid
- 8.6HighCVSS base score
- 88.1%Exploitation in 30 daysEPSS · top 0.2% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. Due to a Buffer Overread bug Squid is vulnerable to a Denial of Service attack against Squid HTTP Message processing. This bug is fixed by Squid version 6.5. Users are advised to upgrade. There are no known workarounds for this vulnerability.
Timeline
ID reserved
By GitHub_M
- 10 days later
· 10 days later
Published
- 15 months later
· 15 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 3.1 | High8.6 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H |
| NVDNVD · Modified | 3.1 | High7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 88.1% · top 0.2% of all CVEs (14 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.6.
Affected products
- affected >= 2.2, < 6.5
References
References9
- https://github.com/squid-cache/squid/security/advisories/GHSA-8w9r-p88v-mmx9 (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://github.com/squid-cache/squid/commit/77b3fb4df0f126784d5fd4967c28ed40eb8d521b (opens in a new tab)x_refsource_MISCx_transferred
- https://github.com/squid-cache/squid/commit/deee944f9a12c9fd399ce52f3e2526bb573a9470 (opens in a new tab)x_refsource_MISCx_transferred
- http://www.squid-cache.org/Versions/v5/SQUID-2023_7.patch (opens in a new tab)x_refsource_MISCx_transferred
- http://www.squid-cache.org/Versions/v6/SQUID-2023_7.patch (opens in a new tab)x_refsource_MISCx_transferred
- https://lists.fedoraproject.org/archives/list/[email protected]/message/MEV66D3PAAY6K7TWDT3WZBLCPLASFJDC/ (opens in a new tab)x_transferred
- https://lists.fedoraproject.org/archives/list/[email protected]/message/A5QASTMCUSUEW3UOMKHZJB3FTONWSRXS/ (opens in a new tab)x_transferred
- https://lists.debian.org/debian-lts-announce/2024/01/msg00003.html (opens in a new tab)x_transferred
- https://security.netapp.com/advisory/ntap-20240119-0004/ (opens in a new tab)x_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2023-53278 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2023-49285)Record last updated .