Description
Multiple integer overflows in io/prprf.c in Mozilla Netscape Portable Runtime (NSPR) before 4.12 allow remote attackers to cause a denial of service (buffer overflow) or possibly have unspecified other impact via a long string to a PR_*printf function.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | firefox-esr | 45.0esr-1 | — |
| Debian 14 | nspr | 2:4.12-1 | — |
| Debian 13 | firefox-esr | 45.0esr-1 | — |
| Debian 13 | nspr | 2:4.12-1 | — |
| Debian 12 | firefox-esr | 45.0esr-1 | — |
| Debian 12 | nspr | 2:4.12-1 | — |
| Debian 8 | nspr | 2:4.12-1+debu8u1 | DSA-3687-1 |
| Debian 7 | nspr | 2:4.9.2-1+deb7u4 | DLA-513-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | nspr | 2:4.12-0ubuntu0.16.04.1 | USN-3028-1 |
| Ubuntu 16.04 LTS | thunderbird | 1:45.2.0+build1-0ubuntu0.16.04.1 | USN-3023-1 |
| Ubuntu 14.04 LTS | nspr | 2:4.12-0ubuntu0.14.04.1 | USN-3028-1 |
| Ubuntu 14.04 LTS | thunderbird | 1:45.2.0+build1-0ubuntu0.14.04.3 | USN-3023-1 |
Advisories 4
- USN-3028-1 nspr vulnerability Ubuntu Security Notices (USN) · Apr 22, 2026
- USN-3023-1 thunderbird vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DLA-513-1 nspr - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-3687-1 nspr - security update Debian Security (DSA / DLA) · Mar 9, 2026
References
- [dev-tech-nspr] 20160217 [ANNOUNCE] NSPR 4.12 Release mailing-list
- 92385 vdb-entry
- 1036590 vdb-entry
- https://hg.mozilla.org/projects/nspr/rev/96381e3aaae2
- https://bugzilla.mozilla.org/show_bug.cgi?id=1174015
- USN-3023-1 vendor-advisory