CVE-2015-8370 — Integer Underflow (Wrap or Wraparound) in Grub2

CWE-264CWE-191 — Integer Underflow (Wrap or Wraparound)CWE-787 — Out-of-bounds Write10 documents9 sources
Severity
7.4HIGHNVD
EPSS
5.1%
top 10.21%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
2
GNU Grub2Fedoraproject Fedora
Timeline
PublishedDec 16
Latest updateMay 14

Description

Multiple integer underflows in Grub2 1.98 through 2.02 allow physically proximate attackers to bypass authentication, obtain sensitive information, or cause a denial of service (disk corruption) via backspace characters in the (1) grub_username_get function in grub-core/normal/auth.c or the (2) grub_password_get function in lib/crypto.c, which trigger an "Off-by-two" or "Out of bounds overwrite" memory error.

CVSS vector

CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:HExploitability: 1.4 | Impact: 5.9

Affected Packages2 packages

▶Debiangnu/grub2< 2.02~beta2-33+3
▶NVDgnu/grub25 versions+4

Also affects: Fedora 23

Patches

Patch: www.oracle.com ↗Patch: www.oracle.com ↗

🔴Vulnerability Details

3
GHSA
GHSA-jjvg-65v4-v3cq: Multiple integer underflows in Grub2 1↗2022-05-14
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CVEList
CVE-2015-8370: Multiple integer underflows in Grub2 1↗2015-12-16
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OSV
CVE-2015-8370: Multiple integer underflows in Grub2 1↗2015-12-16
▶

📋Vendor Advisories

4
Microsoft
CVE-2015-8370: NIST NVD Details: https://nvd↗2020-08-11
▶
Ubuntu
GRUB vulnerability↗2015-12-15
▶
Red Hat
grub2: buffer overflow when checking password entered during bootup↗2015-12-10
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Debian
CVE-2015-8370: grub2 - Multiple integer underflows in Grub2 1.98 through 2.02 allow physically proximat...↗2015
▶

💬Community

2
Bugzilla
CVE-2015-8370 grub2: buffer overflow when checking password entered during bootup [fedora-all]↗2015-12-10
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Bugzilla
CVE-2015-8370 grub2: buffer overflow when checking password entered during bootup↗2015-12-01
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CVE-2015-8370 — Integer Underflow (Wrap or Wraparound) | cvebase