Buffer overflow in Squid-Cache Squid
CVE-2023-46847
Squid is vulnerable to a Denial of Service, where a remote attacker can perform buffer overflow attack by writing up to 2 MB of arbitrary data to heap memory when Squid is configured to accept HTTP Digest Authentication.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H.
EPSS exploit prediction
EPSS: 0.785 (99.6th percentile), scored .
High probability of exploitation in the next 30 days — patch promptly. 100th percentile — 99.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.884 · newest: 0.785 · change: -0.098
Affected products
- Squid-Cache Squid
- Red Hat Enterprise Linux 6 Extended Lifecycle Support — versions 7:3.4.14-15.el6_10.1, 7:3.1.23-24.el6_10.1
- Red Hat Enterprise Linux 7 — versions 7:3.5.20-17.el7_9.9
- Red Hat Enterprise Linux 7.6 Advanced Update Support — versions 7:3.5.20-12.el7_6.2
- Red Hat Enterprise Linux 7.6 Advanced Update Support(disable Again In 2026 - Sprhel-7118) — versions 7:3.5.20-12.el7_6.2
- Red Hat Enterprise Linux 7.7 Advanced Update Support — versions 7:3.5.20-13.el7_7.1
- Red Hat Enterprise Linux 8 — versions 8080020231030214932.63b34585, 8090020231030224841.a75119d5
- Red Hat Enterprise Linux 8.1 Update Services For SAP Solutions — versions 8010020231101141358.c27ad7f8
- Red Hat Enterprise Linux 8.2 Advanced Update Support — versions 8020020231101135052.4cda2c84
- Red Hat Enterprise Linux 8.2 Telecommunications Update Service — versions 8020020231101135052.4cda2c84
Weakness classification (CWE)
Public proof-of-concept exploits
References
- access.redhat.com/errata/RHSA-2023:6266 (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2023:6267 (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2023:6268 (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2023:6748 (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2023:6801 (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2023:6803 (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2023:6804 (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2023:6805 (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2023:6810 (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2023:6882 (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2023-46847?
- CVE-2023-46847 is a high-severity vulnerability in Squid-Cache Squid, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 8.6/10. Published 2023-11-03.
- How severe is CVE-2023-46847?
- High severity. CVSS v3 base score is 8.6 out of 10.
- Is CVE-2023-46847 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.