CVE catalog

CVE-2016-2570

squid: CVE-2016-2570

Severity: High · CVSS 7.5CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published: Feb 27, 2016, 12:00:00 AM UTC
Source: [NVD] · [CVE record]
EPSS: 8.95% · Oct 25, 2026

The Edge Side Includes (ESI) parser in Squid 3.x before 3.5.15 and 4.x before 4.0.7 does not check buffer limits during XML parsing, which allows remote HTTP servers to cause a denial of service (assertion failure and daemon exit) via a crafted XML document, related to esi/CustomParser.cc and esi/CustomParser.h.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	squid	sid	`7.7-1`	not affected
Debian	squid	forky	`7.7-1`	not affected
Debian	squid	trixie	`6.13-2+deb13u3`	not affected
Debian	squid	trixie-security	`6.13-2+deb13u2`	not affected
Debian	squid	bookworm	`5.7-2+deb12u5`	not affected
Debian	squid	bookworm-security	`5.7-2+deb12u6`	not affected
Ubuntu	squid3	16.04	`3.3.8-1ubuntu16`	vulnerable
Ubuntu	squid3	16.04	`3.3.8-1ubuntu17`	vulnerable
Ubuntu	squid3	16.04	`3.5.12-1ubuntu6`	vulnerable
Ubuntu	squid3	16.04	`3.5.12-1ubuntu7`	vulnerable
Ubuntu	squid3	16.04	`3.5.12-1ubuntu7.1`	vulnerable
Ubuntu	squid3	16.04	`3.5.12-1ubuntu7.2`	vulnerable
Ubuntu	squid3	16.04	`3.5.12-1ubuntu7.3`	vulnerable
Ubuntu	squid3	16.04	`3.5.12-1ubuntu7.4`	vulnerable
Ubuntu	squid3	16.04	`3.5.12-1ubuntu7.5`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	squid	source	sid	`Not affected`	unimportant	Not reported	Not reported
Debian	squid	source	forky	`Not affected`	unimportant	Not reported	Not reported
Debian	squid	source	trixie	`Not affected`	unimportant	Not reported	Not reported
Debian	squid	source	bookworm	`Not affected`	unimportant	Not reported	Not reported
Ubuntu	squid3	deb	16.04	`3.5.12-1ubuntu7.5`	Not reported	UBUNTU-CVE-2016-2570	Not reported

OpenFactory catalog packages

Matching against OpenFactory catalog package versions is in progress.

[Debian 12 (Bookworm)]

[squid]Unknown
Details (4)
- 5.7-2+deb12u5 · amd64 · bookworm
  Not affected
  dsa · squid · debian · bookworm
- 5.7-2+deb12u5 · arm64 · bookworm
  Not affected
  dsa · squid · debian · bookworm
- 5.7-2+deb12u6 · amd64 · bookworm-security
  Not affected
  dsa · squid · debian · bookworm
- 5.7-2+deb12u6 · arm64 · bookworm-security
  Not affected
  dsa · squid · debian · bookworm
[squid-cgi]Unknown
Source package: [squid]
Details (4)
- 5.7-2+deb12u5 · amd64 · bookworm
  Not affected
  dsa · squid · debian · bookworm
- 5.7-2+deb12u5 · arm64 · bookworm
  Not affected
  dsa · squid · debian · bookworm
- 5.7-2+deb12u6 · amd64 · bookworm-security
  Not affected
  dsa · squid · debian · bookworm
- 5.7-2+deb12u6 · arm64 · bookworm-security
  Not affected
  dsa · squid · debian · bookworm
[squidclient]Unknown
Source package: [squid]
Details (4)
- 5.7-2+deb12u5 · amd64 · bookworm
  Not affected
  dsa · squid · debian · bookworm
- 5.7-2+deb12u5 · arm64 · bookworm
  Not affected
  dsa · squid · debian · bookworm
- 5.7-2+deb12u6 · amd64 · bookworm-security
  Not affected
  dsa · squid · debian · bookworm
- 5.7-2+deb12u6 · arm64 · bookworm-security
  Not affected
  dsa · squid · debian · bookworm
[squid-common]Unknown
Source package: [squid]
Details (4)
- 5.7-2+deb12u5 · all · bookworm
  Not affected
  dsa · squid · debian · bookworm
- 5.7-2+deb12u5 · all · bookworm
  Not affected
  dsa · squid · debian · bookworm
- 5.7-2+deb12u6 · all · bookworm-security
  Not affected
  dsa · squid · debian · bookworm
- 5.7-2+deb12u6 · all · bookworm-security
  Not affected
  dsa · squid · debian · bookworm
[squid-openssl]Unknown
Source package: [squid]
Details (4)
- 5.7-2+deb12u5 · amd64 · bookworm
  Not affected
  dsa · squid · debian · bookworm
- 5.7-2+deb12u5 · arm64 · bookworm
  Not affected
  dsa · squid · debian · bookworm
- 5.7-2+deb12u6 · amd64 · bookworm-security
  Not affected
  dsa · squid · debian · bookworm
- 5.7-2+deb12u6 · arm64 · bookworm-security
  Not affected
  dsa · squid · debian · bookworm
[squid-purge]Unknown
Source package: [squid]
Details (4)
- 5.7-2+deb12u5 · amd64 · bookworm
  Not affected
  dsa · squid · debian · bookworm
- 5.7-2+deb12u5 · arm64 · bookworm
  Not affected
  dsa · squid · debian · bookworm
- 5.7-2+deb12u6 · amd64 · bookworm-security
  Not affected
  dsa · squid · debian · bookworm
- 5.7-2+deb12u6 · arm64 · bookworm-security
  Not affected
  dsa · squid · debian · bookworm

Observed: Oct 23, 2026, 5:20:25 PM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]