Buffer overflow in Libproxy Project
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.036 (88.9th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 89th percentile — 88.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.036 · newest: 0.036 · change: 0.000
Affected products
- Libproxy Project
- Debian Linux — versions 9.0, 10.0
- Fedoraproject Fedora — versions 32, 33
- openSUSE Leap — versions 15.1, 15.2
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/libproxy/libproxy/pull/126 (Third Party Advisory)
- bugs.debian.org/968366 (Third Party Advisory, Issue Tracking)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.opensuse.org/opensuse-security-announce/2020-10/msg00030.html (vendor-advisory, Third Party Advisory, Issue Tracking)
- lists.opensuse.org/opensuse-security-announce/2020-10/msg00033.html (vendor-advisory, Third Party Advisory, Issue Tracking)
- lists.debian.org/debian-lts-announce/2020/11/msg00024.html (mailing-list, Mailing List, Third Party Advisory)
- www.debian.org/security/2020/dsa-4800 (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-26154?
- CVE-2020-26154 is a critical-severity vulnerability in Libproxy Project, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 9.8/10. Published 2020-09-30.
- How severe is CVE-2020-26154?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2020-26154 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.