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.

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

EPSS: 0.858 (99.7th percentile) — read the EPSS interpretation.

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.

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(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
Red Hat Enterprise Linux 8.2 Update Services For Sap Solutions — versions 8020020231101135052.4cda2c84

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

Public proof-of-concept exploits

References

secalert@redhat.com (x_refsource_REDHAT, vendor-advisory, Third Party Advisory)
secalert@redhat.com (x_refsource_REDHAT, vendor-advisory, Third Party Advisory)
secalert@redhat.com (x_refsource_REDHAT, vendor-advisory, Third Party Advisory)
secalert@redhat.com (x_refsource_REDHAT, vendor-advisory, Third Party Advisory)
secalert@redhat.com (x_refsource_REDHAT, vendor-advisory, Third Party Advisory)
secalert@redhat.com (x_refsource_REDHAT, vendor-advisory, Third Party Advisory)
secalert@redhat.com (x_refsource_REDHAT, vendor-advisory, Third Party Advisory)
secalert@redhat.com (x_refsource_REDHAT, vendor-advisory, Third Party Advisory)
secalert@redhat.com (x_refsource_REDHAT, vendor-advisory, Third Party Advisory)
secalert@redhat.com (x_refsource_REDHAT, 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.