libproxy: uncontrolled recursion via an infinite stream response leading to stack exhaustion
Published Sep 9, 2020
7.5
HIGHCVSS 3.1
EPSS 4.37%
Description
url::recvline in url.cpp in libproxy 0.4.x through 0.4.15 allows a remote HTTP server to trigger uncontrolled recursion via a response composed of an infinite stream that lacks a newline character. This leads to stack exhaustion.
Affected products
No data.
Configuration 1
- ≥ 0.4.0 · ≤ 0.4.15
Configuration 2
- 9.0
- 10.0
Configuration 3
- 31
- 32
- 33
Configuration 5
- 16.04
- 18.04
- 20.04
No data.
Red Hat Enterprise Linux 8
libproxy-0:0.4.15-5.5.el8_10
Fixed · RHEA-2024:8852
Red Hat Enterprise Linux 8
libproxy-0:0.4.15-5.5.el8_10
Fixed · RHEA-2024:8852
Red Hat Enterprise Linux 8.8 Extended Update Support
libproxy-0:0.4.15-5.4.el8_8
Fixed · RHSA-2024:6205
Red Hat Enterprise Linux 6
libproxy
Out of support scope
Red Hat Enterprise Linux 7
libproxy
Out of support scope
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 8 | libproxy-0:0.4.15-5.5.el8_10 | Fixed | RHEA-2024:8852 |
| Red Hat Enterprise Linux 8 | libproxy-0:0.4.15-5.5.el8_10 | Fixed | RHEA-2024:8852 |
| Red Hat Enterprise Linux 8.8 Extended Update Support | libproxy-0:0.4.15-5.4.el8_8 | Fixed | RHSA-2024:6205 |
| Red Hat Enterprise Linux 6 | libproxy | Out of support scope | n/a |
| Red Hat Enterprise Linux 7 | libproxy | Out of support scope | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
Red Hat has determined this flaw to be of moderate impact as the attack triggers an uncontrolled recursion beyond the attacker's control and results in a DoS, which can cause service disruptions but does not directly enable privilege escalation or arbitrary code execution.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
1 other source (Red Hat) ▾
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
No CVSS v3.0 score for this CVE.
AV:N/AC:L/Au:N/C:N/I:N/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (21 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 4.37% (0.04367) | 90.95th | v5 (v2026.06.15) |
| Jun 15, 2026 | 4.28% (0.04284) | 89.80th | v5 (v2026.06.15) |
| Nov 21, 2025 | 0.24% (0.00239) | 46.89th | v4 (v2025.03.14) |
| Nov 18, 2025 | 3.56% (0.03558) | 86.52th | v4 (v2025.03.14) |
| Mar 17, 2025 | 0.90% (0.00902) | 74.08th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.43% (0.00432) | 75.34th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.39% (0.00394) | 72.71th | v3 (v2023.03.01) |
| Nov 8, 2023 | 0.39% (0.00394) | 70.42th | v3 (v2023.03.01) |
| Jul 19, 2023 | 3.51% (0.03510) | 90.29th | v3 (v2023.03.01) |
| May 26, 2023 | 2.51% (0.02507) | 88.54th | v3 (v2023.03.01) |
| May 13, 2023 | 2.31% (0.02313) | 88.09th | v3 (v2023.03.01) |
| Apr 16, 2023 | 1.64% (0.01643) | 85.68th | v3 (v2023.03.01) |
| Mar 7, 2023 | 1.42% (0.01415) | 84.41th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.54% (0.01537) | 74.52th | v2 (v2022.01.01) |
| Feb 23, 2023 | 1.54% (0.01537) | 74.48th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.54% (0.01537) | 72.41th | v2 (v2022.01.01) |
| Feb 4, 2022 | 16.31% (0.16306) | 92.84th | v2 (v2022.01.01) |
| Feb 3, 2022 | 8.66% (0.08659) | 85.81th | v1 |
| Jan 6, 2022 | 8.66% (0.08659) | 85.64th | v1 |
| Sep 1, 2021 | 2.07% (0.02069) | 77.27th | v1 |
| Apr 14, 2021 | 2.07% (0.02069) | 0.00th | v1 |
References (13)
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00030.html vendor-advisoryx_refsource_SUSEMailing ListThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00033.html vendor-advisoryx_refsource_SUSEMailing ListThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2020-25219 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1880349 Issue Tracking
- https://github.com/libproxy/libproxy/issues/134 x_refsource_MISCExploitThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/09/msg00012.html mailing-listx_refsource_MLISTThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CNID6EZVOVH7EZB7KFU2EON54CFDIVUR/ vendor-advisoryx_refsource_FEDORA
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JF5JSONJNO64ARWRVOS6K6HSIPHEF3H2/ vendor-advisoryx_refsource_FEDORA
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SSVZAAVHBJR3Z4MZNR55QW3OQFAS2STH/ vendor-advisoryx_refsource_FEDORA
- https://nvd.nist.gov/vuln/detail/CVE-2020-25219
- https://usn.ubuntu.com/4514-1/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2020-25219
- https://www.debian.org/security/2020/dsa-4800 vendor-advisoryx_refsource_DEBIANThird Party Advisory
Change history (0)
No recorded changes yet.