HIGH
squid: some code paths fail to check bounds in string object
Published Feb 27, 2016
7.5
HIGHCVSS 3.0
EPSS 31.19%
Description
Squid 3.x before 3.5.15 and 4.x before 4.0.7 does not properly append data to String objects, which allows remote servers to cause a denial of service (assertion failure and daemon exit) via a long string, as demonstrated by a crafted HTTP Vary header.
Affected products
No data.
OR
- 3.0
- 3.0
- 3.0
- 3.0
- 3.0
- 3.0
- 3.0
- 3.0
- 3.0
- 3.0.stable1
- 3.0.stable2
- 3.0.stable3
- 3.0.stable4
- 3.0.stable5
- 3.0.stable6
- 3.0.stable7
- 3.0.stable8
- 3.0.stable9
- 3.0.stable10
- 3.0.stable11
- 3.0.stable11
- 3.0.stable12
- 3.0.stable13
- 3.0.stable14
- 3.0.stable15
- 3.0.stable16
- 3.0.stable16
- 3.0.stable17
- 3.0.stable18
- 3.0.stable19
- 3.0.stable20
- 3.0.stable21
- 3.0.stable22
- 3.0.stable23
- 3.0.stable24
- 3.0.stable25
- 3.1
- 3.1.0.1
- 3.1.0.2
- 3.1.0.3
- 3.1.0.4
- 3.1.0.5
- 3.1.0.6
- 3.1.0.7
- 3.1.0.8
- 3.1.0.9
- 3.1.0.10
- 3.1.0.11
- 3.1.0.12
- 3.1.0.13
- 3.1.0.14
- 3.1.0.15
- 3.1.0.16
- 3.1.0.17
- 3.1.0.18
- 3.1.1
- 3.1.2
- 3.1.3
- 3.1.4
- 3.1.5
- 3.1.5.1
- 3.1.6
- 3.1.7
- 3.1.8
- 3.1.9
- 3.1.10
- 3.1.11
- 3.1.12
- 3.1.13
- 3.1.14
- 3.1.15
- 3.2.0.1
- 3.2.0.2
- 3.2.0.3
- 3.2.0.4
- 3.2.0.5
- 3.2.0.6
- 3.2.0.7
- 3.2.0.8
- 3.2.0.9
- 3.2.0.10
- 3.2.0.11
- 3.2.0.12
- 3.2.0.13
- 3.2.0.14
- 3.2.0.15
- 3.2.0.16
- 3.2.0.17
- 3.2.0.18
- 3.2.0.19
- 3.2.1
- 3.2.2
- 3.2.3
- 3.2.4
- 3.2.5
- 3.2.6
- 3.2.7
- 3.2.8
- 3.2.9
- 3.2.10
- 3.2.11
- 3.2.12
- 3.2.13
- 3.3.0
- 3.3.0.2
- 3.3.0.3
- 3.3.1
- 3.3.2
- 3.3.3
- 3.3.4
- 3.3.5
- 3.3.6
- 3.3.7
- 3.3.8
- 3.3.9
- 3.3.10
- 3.3.11
- 3.3.12
- 3.3.13
- 3.4.0.1
- 3.4.0.2
- 3.4.0.3
- 3.4.1
- 3.4.2
- 3.4.3
- 3.4.4
- 3.4.8
- 3.4.9
- 3.4.10
- 3.4.11
- 3.4.12
- 3.4.13
- 3.5.0.1
- 3.5.0.2
- 3.5.0.3
- 3.5.0.4
- 3.5.1
- 4.0.1
- 4.0.2
- 4.0.3
- 4.0.4
- 4.0.5
- 4.0.6
No data.
Red Hat Enterprise Linux 7
squid-7:3.5.20-2.el7
Fixed · RHSA-2016:2600
Red Hat Enterprise Linux 5
squid
Will not fix
Red Hat Enterprise Linux 6
squid
Will not fix
Red Hat Enterprise Linux 6
squid34
Will not fix
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 7 | squid-7:3.5.20-2.el7 | Fixed | RHSA-2016:2600 |
| Red Hat Enterprise Linux 5 | squid | Will not fix | n/a |
| Red Hat Enterprise Linux 6 | squid | Will not fix | n/a |
| Red Hat Enterprise Linux 6 | squid34 | Will not fix | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
Red Hat Product Security has rated this issue as having Moderate security impact. This issue is not currently planned to be addressed in future updates. For additional information, refer to the Issue Severity Classification: https://access.redhat.com/security/updates/classification/.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
7.5 HIGH NVD
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Impact None
Integrity Impact None
Availability Impact High
5.0 MEDIUM NVD
AV:N/AC:L/Au:N/C:N/I:N/A:P
Access Vector Network
Access Complexity Low
Authentication None
Confidentiality Impact None
Integrity Impact None
Availability Impact Partial
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
31.19% 0.31187
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.31187
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (43 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 31.19% (0.31187) | 98.22th | v5 (v2026.06.15) |
| Sep 22, 2026 | 31.19% (0.31187) | 98.19th | v5 (v2026.06.15) |
| Sep 21, 2026 | 35.37% (0.35367) | 98.42th | v5 (v2026.06.15) |
| Sep 6, 2026 | 31.19% (0.31187) | 98.15th | v5 (v2026.06.15) |
| Sep 5, 2026 | 35.37% (0.35367) | 98.39th | v5 (v2026.06.15) |
| Aug 30, 2026 | 31.19% (0.31187) | 98.14th | v5 (v2026.06.15) |
| Aug 28, 2026 | 35.37% (0.35367) | 98.38th | v5 (v2026.06.15) |
| Aug 24, 2026 | 31.19% (0.31187) | 98.13th | v5 (v2026.06.15) |
| Aug 23, 2026 | 35.37% (0.35367) | 98.37th | v5 (v2026.06.15) |
| Jun 15, 2026 | 30.67% (0.30670) | 98.00th | v5 (v2026.06.15) |
| Feb 23, 2026 | 70.32% (0.70316) | 98.65th | v4 (v2025.03.14) |
| Dec 28, 2025 | 71.40% (0.71402) | 98.66th | v4 (v2025.03.14) |
| Dec 27, 2025 | 62.24% (0.62242) | 98.30th | v4 (v2025.03.14) |
| Dec 13, 2025 | 71.40% (0.71402) | 98.65th | v4 (v2025.03.14) |
| Oct 28, 2025 | 67.60% (0.67602) | 98.50th | v4 (v2025.03.14) |
| Oct 27, 2025 | 57.55% (0.57555) | 98.05th | v4 (v2025.03.14) |
| Oct 1, 2025 | 67.60% (0.67602) | 98.53th | v4 (v2025.03.14) |
| Sep 7, 2025 | 57.55% (0.57555) | 98.09th | v4 (v2025.03.14) |
| Aug 20, 2025 | 67.99% (0.67989) | 98.52th | v4 (v2025.03.14) |
| Jul 30, 2025 | 65.76% (0.65757) | 98.42th | v4 (v2025.03.14) |
| Mar 30, 2025 | 74.15% (0.74153) | 98.75th | v4 (v2025.03.14) |
| Mar 29, 2025 | 72.87% (0.72869) | 98.39th | v4 (v2025.03.14) |
| Mar 28, 2025 | 74.15% (0.74153) | 98.75th | v4 (v2025.03.14) |
| Mar 27, 2025 | 72.87% (0.72869) | 98.65th | v4 (v2025.03.14) |
| Mar 20, 2025 | 74.15% (0.74153) | 98.79th | v4 (v2025.03.14) |
| Mar 19, 2025 | 72.87% (0.72869) | 98.68th | v4 (v2025.03.14) |
| Mar 17, 2025 | 74.15% (0.74153) | 98.76th | v4 (v2025.03.14) |
| Dec 12, 2024 | 95.67% (0.95672) | 99.50th | v3 (v2023.03.01) |
| Aug 13, 2024 | 95.67% (0.95672) | 99.46th | v3 (v2023.03.01) |
| Aug 10, 2024 | 90.97% (0.90967) | 98.91th | v3 (v2023.03.01) |
| Mar 28, 2024 | 95.67% (0.95672) | 99.37th | v3 (v2023.03.01) |
| Feb 22, 2024 | 95.49% (0.95495) | 99.32th | v3 (v2023.03.01) |
| Nov 16, 2023 | 94.97% (0.94965) | 99.09th | v3 (v2023.03.01) |
| Sep 10, 2023 | 94.44% (0.94443) | 98.90th | v3 (v2023.03.01) |
| Aug 8, 2023 | 94.97% (0.94965) | 98.97th | v3 (v2023.03.01) |
| Jul 8, 2023 | 94.29% (0.94292) | 98.81th | v3 (v2023.03.01) |
| Jul 5, 2023 | 96.62% (0.96623) | 99.42th | v3 (v2023.03.01) |
| May 29, 2023 | 95.72% (0.95722) | 99.09th | v3 (v2023.03.01) |
| May 8, 2023 | 95.34% (0.95338) | 98.98th | v3 (v2023.03.01) |
| Mar 7, 2023 | 93.14% (0.93137) | 98.46th | v3 (v2023.03.01) |
| Mar 6, 2023 | 16.31% (0.16306) | 96.13th | v2 (v2022.01.01) |
| Apr 1, 2022 | 16.31% (0.16306) | 95.78th | v2 (v2022.01.01) |
| Feb 4, 2022 | 16.31% (0.16306) | 92.84th | v2 (v2022.01.01) |
Weaknesses (2)
References (15)
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00010.html vendor-advisoryx_refsource_SUSE
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00040.html vendor-advisoryx_refsource_SUSE
- http://lists.opensuse.org/opensuse-updates/2016-08/msg00069.html vendor-advisoryx_refsource_SUSE
- http://rhn.redhat.com/errata/RHSA-2016-2600.html vendor-advisoryx_refsource_REDHAT
- http://www.openwall.com/lists/oss-security/2016/02/26/2 mailing-listx_refsource_MLIST
- http://www.securitytracker.com/id/1035101 vdb-entryx_refsource_SECTRACK
- http://www.squid-cache.org/Advisories/SQUID-2016_2.txt x_refsource_CONFIRMVendor Advisory
- http://www.squid-cache.org/Versions/v3/3.5/changesets/squid-3.5-13991.patch x_refsource_CONFIRM
- http://www.squid-cache.org/Versions/v4/changesets/squid-4-14552.patch x_refsource_CONFIRM
- https://access.redhat.com/security/cve/CVE-2016-2569 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1312257 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2016-2569
- https://security.gentoo.org/glsa/201607-01 vendor-advisoryx_refsource_GENTOO
- https://usn.ubuntu.com/3557-1/ vendor-advisoryx_refsource_UBUNTU
- https://www.cve.org/CVERecord?id=CVE-2016-2569
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published Feb 27, 2016
Updated Aug 5, 2024
Reserved Feb 26, 2016
Link CVE-2016-2569
CISA Vulnrichment
Updated n/a