CVE-2020-26154
url.cpp in libproxy through 0.4.15 is prone to a buffer overflow when PAC is enabled, as demonstrated by a large PAC file that is delivered without a Content-length header.
02 Description
url.cpp in libproxy through 0.4.15 is prone to a buffer overflow when PAC is enabled, as demonstrated by a large PAC file that is delivered without a Content-length header.
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 3.55% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 89.2% of scored records. A rank, not a probability.
- NVD base score
- 9.8 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- Red Hat severity
- Moderate. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2020-09-29 22:02Z6 YR AGO
- Last updated
- 2024-08-04 15:49Z2 YR AGO
- Reserved
- 2020-09-29
- Assigning CNA
- mitre
- Record state
- PUBLISHED
- Severity
- Not rated by the issuing CNA
- CNA CVSS vector
- Not published by the issuing CNA
- Weaknesses
- Data version
- 5.1
- Document digest
- 76dc215861872687ee613dda544b35489ac7591456a3afe74f1f177b44917572
05 Affected products
06 References
- github.comhttps://github.com/libproxy/libproxy/pull/126
- bugs.debian.orghttps://bugs.debian.org/968366
- lists.fedoraproject.orgFEDORA-2020-15b775b07ehttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3BID3HVHAF6DA3YJOFDBSAZSMR3ODNIW/
- lists.fedoraproject.orgFEDORA-2020-941b563a80https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WZVZXTFMFTSML3J6OOCDBDYH474BRJSW/
- lists.opensuse.orgopenSUSE-SU-2020:1676http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00030.html
- lists.opensuse.orgopenSUSE-SU-2020:1680http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00033.html
- lists.debian.org[debian-lts-announce] 20201113 [SECURITY] [DLA 2450-1] libproxy security updatehttps://lists.debian.org/debian-lts-announce/2020/11/msg00024.html
- www.debian.orgDSA-4800https://www.debian.org/security/2020/dsa-4800
07 Fixed in
Debian 12
- libproxy Fixed in 0.4.15-15
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- libproxy Fixed in 0.4.15-15
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- libproxy Fixed in 0.4.15-15
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 16.04 LTS
- libproxy Fixed in 0.4.11-5ubuntu1.2
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 18.04 LTS
- libproxy Fixed in 0.4.15-1ubuntu0.2
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 20.04 LTS
- libproxy Fixed in 0.4.15-10ubuntu1.2
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.