High severity · published Jul 11, 2019
CVE-2019-12527
An issue was discovered in Squid 4.0.23 through 4.7
8.8
CVSS
49%
EPSS
No
On KEV
Description
An issue was discovered in Squid 4.0.23 through 4.7. When checking Basic Authentication with HttpHeader::getAuth, Squid uses a global buffer to store the decoded data. Squid does not check that the decoded length isn't greater than the buffer, leading to a heap-based buffer overflow with user controlled data.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)49.0% · higher than 99% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DL
Debian Linux · Debian
10.0 · source: NVD
EL
Enterprise Linux · Redhat
8.0 · source: NVD
EL
Enterprise Linux Eus · Redhat
8.1; 8.2; 8.4; 8.6 · source: NVD
EL
Enterprise Linux Server Aus · Redhat
8.2; 8.4; 8.6 · source: NVD
EL
Enterprise Linux Server Tus · Redhat
8.2; 8.4; 8.6 · source: NVD
FE
Fedora · Fedoraproject
29 · source: NVD
SQ
Squid · Squid-cache
4.0.23 through 4.7 · source: NVD
UL
Ubuntu Linux · Canonical
16.04; 18.04; 19.04 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-12527
CVE.org
https://www.cve.org/CVERecord?id=CVE-2019-12527
Broken Link
http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00053.html
Broken Link
http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00056.html
Broken Link
http://www.securityfocus.com/bid/109143
Vendor Advisory
http://www.squid-cache.org/Versions/v4/changesets/
Patch
http://www.squid-cache.org/Versions/v4/changesets/squid-4-7f73e9c5d17664b882ed32590e6af310c247f320.patch
Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:2593
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