CVE-2020-13253 — sd_wp_addr in hw/sd/sd

sd_wp_addr in hw/sd/sd.c in QEMU 4.2.0 uses an unvalidated address, which leads to an out-of-bounds read during sdhci_write() operations. A guest OS user can crash the QEMU process.

01What is this vulnerability?

sd_wp_addr in hw/sd/sd.c in QEMU 4.2.0 uses an unvalidated address, which leads to an out-of-bounds read during sdhci_write() operations. A guest OS user can crash the QEMU process.

02Affected products

Vendor	Product	Versions
n	a / n/a	n/a

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2020-05-27T14:09:55.000Z
• Last modified: 2024-08-04T12:11:19.480Z

09References

• lists.gnu.org — https://lists.gnu.org/archive/html/qemu-devel/2020-05/msg05835.html
• www.openwall.com — http://www.openwall.com/lists/oss-security/2020/05/27/2
• bugzilla.redhat.com — https://bugzilla.redhat.com/show_bug.cgi?id=1838546
• usn.ubuntu.com — https://usn.ubuntu.com/4467-1/
• lists.debian.org — https://lists.debian.org/debian-lts-announce/2020/09/msg00013.html
• security.gentoo.org — https://security.gentoo.org/glsa/202011-09
• lists.debian.org — https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html