CVE-2019-18679
High
Description
An issue was discovered in Squid 2.x, 3.x, and 4.x through 4.8. Due to incorrect data management, it is vulnerable to information disclosure when processing HTTP Digest Authentication. Nonce tokens contain the raw byte value of a pointer that sits within heap memory allocation. This information reduces ASLR protections and may aid attackers isolating memory areas to target for remote code execution attacks.
SeverityHigh
CVSS7.5
Exploit probability—
Product
Squid
PublishedNov 26, 2019
First seenNov 26, 2019
How to fix
Vendor advisories
- usn.ubuntu.com/4213-1/
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UEMOYTMCCFWK5NOXSXEIH5D2VGWVXR67/
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MTM74TU2BSLT5B3H4F3UDW53672NVLMC/
- security.gentoo.org/glsa/202003-34
- debian.org/security/2020/dsa-4682
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| squid-cache squid | 2.0 ≤ v ≤ 2.7, 3.0 ≤ v ≤ 3.5.28, 4.0 ≤ v ≤ 4.8, 2.7 | — |
| canonical ubuntu_linux | 16.04, 18.04, 19.04, 19.10 | — |
| debian debian_linux | 8.0 | — |
| fedoraproject fedora | 30, 31 | — |
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